Encycolorpedia

#c44744 Barwy Hex

#c44744 Paint ChipSzesnastkowykod kolour #c44744 jest odcieniem czerwony. W kolorze RGB model #c44744 składa się z 76.86% czerwonego, 27.84% zielonego i 26.67% niebieskiego. W kolorze HSL przestrzeń #c44744 ma odcień 1° (stopni), 52% nasycenie i 52% jasność. Kolor ten ma przybliżoną długość fali 609.5 nm.

Odmiany Kolorów

Nazwane Kolory

Schematy Kolorów

Pobieranie: GIMP GPL Adobe ASE (Adobe Swatch Exchange) Sketch Palette

#c44744 gradient liniowy do kompemetnarnego #09d7ff

  1. #c44744
  2. #c06461
  3. #b87d7e
  4. #ab949d
  5. #97abbd
  6. #74c1dd
  7. #09d7ff

Kolory monochromatyczne

  1. #ab3031
  2. #b33837
  3. #bb3f3e
  4. #c44744
  5. #cd4f4a
  6. #d55651
  7. #de5e58

Barwa

  1. #c44744
  2. #bc544e
  3. #b36059
  4. #aa6a63
  5. #9f736e
  6. #937c79
  7. #848484

Odcienie kolorów

#c44744 do białego

  1. #c44744
  2. #d26860
  3. #df867e
  4. #eaa49d
  5. #f3c2bc
  6. #fae0dd
  7. #ffffff / #fff

#c44744 do czarnego

  1. #c44744
  2. #a13d39
  3. #7f322f
  4. #5f2825
  5. #401e1b
  6. #241311
  7. #000000 / #000

Farba

Podobne farby

  1. Pantone / PMS

    1. ★ 2033 C
      #c54644
      ΔE = 0.267 / LRV ≈ 16.7%
    2. 8903 C
      #bd4649
      ΔE = 2.491 / LRV ≈ 15.7%
  2. Opaltone / OMS

    1. ★ 4331
      #c54743
      ΔE = 0.387 / LRV ≈ 16.8%
    2. 4493
      #c33037
      ΔE = 4.342 / LRV ≈ 14.0%
  3. Peintures MF

    1. ★ Phylox
      #c34642
      ΔE = 0.497 / LRV ≈ 16.4%
    2. Cha cha
      #c7404b
      ΔE = 3.337 / LRV ≈ 16.3%
  4. Earthpaint

    1. ★ 1-1-7 Delectable
      #c44747
      ΔE = 0.872 / LRV ≈ 16.7%
    2. 2-4-6 Shell Coral
      #b8554a
      ΔE = 3.403 / LRV ≈ 17.2%
  5. Laura Ashley

    1. ★ 316 Marasca Cherry
      #c14543
      ΔE = 0.892 / LRV ≈ 16.0%
    2. 47-7 Popsickle
      #ce4c56
      ΔE = 4.737 / LRV ≈ 19.0%
  6. California Paints

    1. ★ Hot Tin Roof
      #c84642
      ΔE = 0.950 / LRV ≈ 17.1%
    2. DEA 105 - Cherry Bomb
      #b73d3f
      ΔE = 4.090 / LRV ≈ 13.8%
  7. Brighto Paints

    1. ★ 6207 Brighto Red
      #c44b45
      ΔE = 0.974 / LRV ≈ 17.2%
    2. 2014 Red Chill
      #b75b4b
      ΔE = 5.026 / LRV ≈ 18.1%
  8. Porter Paints

    1. ★ Sunset Skyline / 132-7
      #c84341
      ΔE = 0.974 / LRV ≈ 16.7%
    2. Crossfire / 130-7
      #c24d3e
      ΔE = 3.020 / LRV ≈ 17.1%
  9. PPG Pittsburgh Paints

    1. ★ Sunset Skyline 132-7
      #c84341
      ΔE = 0.974 / LRV ≈ 16.7%
    2. Teaberry Blossom / PPG1189-7
      #b44940
      ΔE = 3.299 / LRV ≈ 14.8%
  10. CIL

    1. ★ Old Glory
      #c74b46
      ΔE = 1.256 / LRV ≈ 17.6%
    2. Poinsettia
      #b94448
      ΔE = 3.407 / LRV ≈ 14.9%
  11. Cloverdale Paint

    1. ★ Pointers Red / 8093
      #c74041
      ΔE = 1.314 / LRV ≈ 16.2%
    2. Rosie O Dell / AC122
      #ba4e50
      ΔE = 3.324 / LRV ≈ 16.5%
  12. Benjamin Moore

    1. ★ Geranium / 1307
      #c24d46
      ΔE = 1.316 / LRV ≈ 17.2%
    2. ★ Strawberry Red / 2003-20
      #c43e3e
      ΔE = 1.826 / LRV ≈ 15.5%
  13. ICI Paints

    1. ★ Old Glory 16YR 18/587
      #c2423f
      ΔE = 1.344 / LRV ≈ 15.7%
    2. 3173 Tea Dance 10YR 21/436
      #bd5754
      ΔE = 3.853 / LRV ≈ 18.3%
  14. RAL

    1. ★ RAL 030 50 60
      #cb4543
      ΔE = 1.358 / LRV ≈ 17.4%
    2. RAL 440-3
      #ba3c3e
      ΔE = 3.664 / LRV ≈ 14.0%
  15. Kelly-Moore

    1. ★ Christmas Red / AC219-R
      #c54245
      ΔE = 1.466 / LRV ≈ 16.2%
    2. Painter's Red / KM3688-5
      #cc3c4a
      ΔE = 3.724 / LRV ≈ 16.6%
  16. Disney

    1. ★ M1-2 Oh Boy Red!
      #be4541
      ΔE = 1.474 / LRV ≈ 15.6%
    2. 2B-70 Code Red
      #bd353b
      ΔE = 4.349 / LRV ≈ 13.7%
  17. Colortrend

    1. ★ 1101
      #c74b4a
      ΔE = 1.517 / LRV ≈ 17.7%
    2. 1095
      #b15250
      ΔE = 4.240 / LRV ≈ 16.0%
  18. Behr

    1. ★ Intrigue P160-6
      #bd4b48
      ΔE = 1.529 / LRV ≈ 16.3%
    2. Top Tomato P180-7
      #d04838
      ΔE = 4.640 / LRV ≈ 18.3%
  19. Taubmans

    1. ★ Sunset Skyline / T10 23C-2
      #c53f40
      ΔE = 1.553 / LRV ≈ 15.8%
    2. Wangaratta / T12 26.G1
      #d8414a
      ΔE = 4.153 / LRV ≈ 18.9%
  20. General Paint

    1. ★ Hot Spot / CL 1437N
      #be4441
      ΔE = 1.592 / LRV ≈ 15.5%
    2. Vigilante / CL 1517N
      #c8503d
      ΔE = 4.441 / LRV ≈ 18.4%
  21. Dupont

    1. ★ CAS77
      #ca4c48
      ΔE = 1.904 / LRV ≈ 18.2%
    2. CAS61
      #c84f53
      ΔE = 3.519 / LRV ≈ 18.5%
  22. Ford

    1. ★ Flamingo Red
      #ba4d49
      ΔE = 2.089 / LRV ≈ 16.2%
    2. Rosewood
      #bf484e
      ΔE = 3.163 / LRV ≈ 16.3%
  23. Mylands of London

    1. ★ Rowanberry
      #c1423b
      ΔE = 2.100 / LRV ≈ 15.6%
  24. Model Master

    1. ★ Model Master 28005
      #ce3e43
      ΔE = 2.220 / LRV ≈ 17.0%
    2. Model Master 2724
      #cd3b41
      ΔE = 2.387 / LRV ≈ 16.5%
  25. Crayola

    1. ★ Chestnut
      #b94e48
      ΔE = 2.221 / LRV ≈ 16.2%
    2. Mahogany
      #ca3435
      ΔE = 3.627 / LRV ≈ 15.3%
  26. Sigma

    1. ★ Warm Red / S 1080-Y90R
      #c4433a
      ΔE = 2.280 / LRV ≈ 16.1%
    2. Warm Red / S 2060-Y90R
      #be5d55
      ΔE = 4.936 / LRV ≈ 19.4%
  27. Caparol

    1. ★ 02/05
      #c43c40
      ΔE = 2.285 / LRV ≈ 15.3%
    2. 03/05
      #c44038
      ΔE = 2.612 / LRV ≈ 15.7%
  28. British Standard

    1. BS 4800 04 E 53 - Poppy / Carnival red
      #bd443c
      ΔE = 2.319 / LRV ≈ 15.3%
    2. BS381 537 - Signal red
      #bb4039
      ΔE = 3.180 / LRV ≈ 14.5%
  29. Asian Paints

    1. Code Red / X120
      #c1403a
      ΔE = 2.333 / LRV ≈ 15.3%
    2. Geranium / 509
      #b4544d
      ΔE = 3.582 / LRV ≈ 16.6%
  30. Craig & Rose

    1. Paulliac
      #bb5046
      ΔE = 2.376 / LRV ≈ 16.7%
  31. Nippon Paint

    1. Sashay Red / NP R 1260 A
      #cc3c3b
      ΔE = 2.419 / LRV ≈ 16.4%
    2. Talk Of The Town / NP AC 2070 A
      #d23c3e
      ΔE = 2.899 / LRV ≈ 17.3%
  32. Pratt & Lambert

    1. Vibrant Red 4-12
      #be3f3f
      ΔE = 2.428 / LRV ≈ 14.9%
    2. Red Clay 3-12
      #ad5049
      ΔE = 4.377 / LRV ≈ 15.1%
  33. Evonik-Degussa

    1. 116
      #c03e3b
      ΔE = 2.449 / LRV ≈ 15.0%
    2. 136
      #b73e46
      ΔE = 4.763 / LRV ≈ 14.0%
  34. Natural Color System / NCS

    1. S 3040-Y90R
      #ba5149
      ΔE = 2.450 / LRV ≈ 16.8%
    2. S 2060-Y90R
      #d03d39
      ΔE = 3.197 / LRV ≈ 17.0%
  35. Devoe Paint

    1. Poinsettia / 05YR 15/555
      #bc4446
      ΔE = 2.473 / LRV ≈ 15.3%
    2. Riding Hood / 30YR 15/550
      #b74935
      ΔE = 4.927 / LRV ≈ 15.1%
  36. Sto

    1. 33100
      #cc463d
      ΔE = 2.628 / LRV ≈ 17.6%
    2. 33201
      #c75351
      ΔE = 3.254 / LRV ≈ 18.9%
  37. Dutch Boy

    1. Tomato Bisque
      #b74845
      ΔE = 2.656 / LRV ≈ 15.1%
    2. Rocket Red
      #ba3b3d
      ΔE = 3.810 / LRV ≈ 13.9%
  38. Johnstone's Paint

    1. Rich Red
      #ba4a4b
      ΔE = 2.691 / LRV ≈ 15.8%
  39. Homebase

    1. Show Stopper
      #bc4b4d
      ΔE = 2.716 / LRV ≈ 16.3%
    2. Flame
      #d3423d
      ΔE = 3.373 / LRV ≈ 18.1%
  40. Crown Diamond

    1. 7216-65 Exclamation
      #b84e4c
      ΔE = 2.765 / LRV ≈ 16.2%
    2. 7218-65 Cardinal Feather
      #c25157
      ΔE = 4.382 / LRV ≈ 18.0%
  41. Wattyl

    1. Sacred Heart / C57W
      #ce454c
      ΔE = 2.912 / LRV ≈ 17.9%
    2. Red Barron / C58W
      #bf3d36
      ΔE = 3.330 / LRV ≈ 14.7%
  42. Coronado Paint

    1. 8053 - Grand Duke
      #c05449
      ΔE = 2.955 / LRV ≈ 18.0%
    2. 8093 - Pointers Red
      #c03636
      ΔE = 3.870 / LRV ≈ 14.1%
  43. Jotun

    1. 2452 / Strawberry Jam
      #b54e45
      ΔE = 2.955 / LRV ≈ 15.7%
    2. 2361 / Energi
      #b0483e
      ΔE = 4.225 / LRV ≈ 14.2%
  44. Berger

    1. Rosie O'Dell / AC122
      #c13d44
      ΔE = 2.966 / LRV ≈ 15.1%
    2. Scarlet Sumac / 8077
      #b34b42
      ΔE = 3.354 / LRV ≈ 15.0%
  45. Vista Paint

    1. Rosie O'Dell
      #c13d44
      ΔE = 2.966 / LRV ≈ 15.1%
    2. Scarlet Sumac
      #b34b42
      ΔE = 3.354 / LRV ≈ 15.0%
  46. Crown Paint

    1. Sticky Fingers
      #bc3f3a
      ΔE = 2.987 / LRV ≈ 14.6%
    2. Cuban Heat
      #c04939
      ΔE = 3.410 / LRV ≈ 16.3%
  47. Caran d'Ache

    1. 065 Russet
      #c7363b
      ΔE = 3.032 / LRV ≈ 15.1%
    2. 070 Scarlet
      #d02d30
      ΔE = 4.876 / LRV ≈ 15.5%
  48. GM / General Motors

    1. Sportsman Red
      #c93f36
      ΔE = 3.171 / LRV ≈ 16.2%
    2. Apricot Ice Mica
      #aa554f
      ΔE = 5.205 / LRV ≈ 15.6%
  49. Dunn-Edwards

    1. Pomegranate / 1358
      #c35550
      ΔE = 3.197 / LRV ≈ 18.7%
    2. Red Icon / 1452
      #c93543
      ΔE = 3.782 / LRV ≈ 15.4%
  50. Bristol

    1. Albury / P071-W6
      #d53f45
      ΔE = 3.300 / LRV ≈ 18.1%
    2. Wangaratta / P072-W6
      #d8414a
      ΔE = 4.153 / LRV ≈ 18.9%
  51. Resene

    1. Daredevil O57-163-043
      #cb483b
      ΔE = 3.304 / LRV ≈ 17.7%
    2. Clementine 10CW28
      #c14f3b
      ΔE = 4.291 / LRV ≈ 17.2%
  52. Levis

    1. Clear Red C70
      #c9464f
      ΔE = 3.308 / LRV ≈ 17.4%
    2. Shady Red C50
      #b05446
      ΔE = 4.481 / LRV ≈ 16.0%
  53. Tikkurila

    1. 0126 / Red
      #c5353d
      ΔE = 3.413 / LRV ≈ 14.8%
  54. Nerolac

    1. Adventure - 2189
      #d64043
      ΔE = 3.415 / LRV ≈ 18.4%
    2. Red Ranch - 4573
      #bb584a
      ΔE = 4.075 / LRV ≈ 18.0%
  55. Plascon

    1. Meadow Sweet R3-B1-2
      #cc4850
      ΔE = 3.428 / LRV ≈ 18.1%
    2. Dusty Peach R5-C1-3
      #bc5c58
      ΔE = 4.965 / LRV ≈ 19.1%
  56. Sherwin-Williams

    1. Enticing Red - 6600
      #b74e4f
      ΔE = 3.488 / LRV ≈ 16.1%
    2. Coral Bells - 6593
      #bb4b51
      ΔE = 3.922 / LRV ≈ 16.2%
  57. Chrysler

    1. Tangerine
      #cf463b
      ΔE = 3.517 / LRV ≈ 18.0%
    2. Coral
      #bf5757
      ΔE = 4.318 / LRV ≈ 18.6%
  58. Diamond Vogel

    1. Movie Star / 1116
      #c43944
      ΔE = 3.539 / LRV ≈ 15.1%
    2. Unmatched Beauty / 1110
      #b43f43
      ΔE = 4.657 / LRV ≈ 13.7%
  59. Glidden

    1. Poinsettia Red / 05YR 15/555
      #c33e49
      ΔE = 3.584 / LRV ≈ 15.5%
    2. Calypso Berry / PPG1185-7
      #c53a4b
      ΔE = 4.790 / LRV ≈ 15.4%
  60. Tollens

    1. T2076-3
      #ce4c51
      ΔE = 3.598 / LRV ≈ 18.9%
    2. UC002 Rouge Kyoto
      #d34236
      ΔE = 4.608 / LRV ≈ 18.0%
  61. Toyo Ink

    1. CF10093
      #b8484c
      ΔE = 3.612 / LRV ≈ 15.3%
    2. CF10087
      #dc3b47
      ΔE = 4.740 / LRV ≈ 18.8%
  62. 1829

    1. Oriental Red
      #b35145
      ΔE = 3.645 / LRV ≈ 15.9%
  63. Federal Standard

    1. Federal Standard 21302
      #ca4e3f
      ΔE = 3.661 / LRV ≈ 18.4%
    2. Federal Standard 11120
      #c23b31
      ΔE = 4.130 / LRV ≈ 14.8%
  64. Humbrol

    1. 100 Red Brown
      #c05648
      ΔE = 3.697 / LRV ≈ 18.3%
  65. Dulux Australia

    1. Mexican Flame / D10
      #c05054
      ΔE = 3.702 / LRV ≈ 17.6%
  66. Magnolia Home

    1. Vine Ripened Tomato / JG-25
      #b5494b
      ΔE = 3.734 / LRV ≈ 15.1%
  67. Clark+Kensington

    1. Apple of My Eye / 08C-7
      #b83e3a
      ΔE = 3.736 / LRV ≈ 13.9%
    2. Chilled Gazpacho / 09C-7
      #c65744
      ΔE = 4.976 / LRV ≈ 19.2%
  68. Brillux

    1. 27.18.21
      #bc5851
      ΔE = 3.748 / LRV ≈ 18.3%
  69. TRUMATCH

    1. 5-c5
      #b74f3f
      ΔE = 3.754 / LRV ≈ 16.0%
    2. 5-b3
      #cb3a32
      ΔE = 3.985 / LRV ≈ 16.0%
  70. Duron

    1. Lusty Red
      #cd303b
      ΔE = 3.758 / LRV ≈ 15.4%
    2. Gypsy Red
      #cc2735
      ΔE = 4.918 / LRV ≈ 14.5%
  71. Teknos

    1. GBI099
      #b65649
      ΔE = 3.906 / LRV ≈ 17.1%
  72. Dulux

    1. 26YR 14/548
      #b3463b
      ΔE = 4.025 / LRV ≈ 14.3%
    2. 31YR 18/648
      #cc4a39
      ΔE = 4.297 / LRV ≈ 18.0%
  73. Valspar Paint

    1. Hibiscus Tea
      #cc3d4c
      ΔE = 4.033 / LRV ≈ 16.7%
    2. Brick Facade
      #c15a4c
      ΔE = 4.513 / LRV ≈ 19.2%
  74. Kansai Paint

    1. Deep Red
      #b0514d
      ΔE = 4.067 / LRV ≈ 15.7%
    2. Tile Red
      #b75c55
      ΔE = 4.858 / LRV ≈ 18.4%
  75. Scib Paints

    1. Grand Duke / 8053
      #cb5345
      ΔE = 4.073 / LRV ≈ 19.3%
    2. Red Red / AC120
      #c4342d
      ΔE = 4.965 / LRV ≈ 14.4%
  76. Marston & Langinger

    1. Vatican Red
      #ba444c
      ΔE = 4.158 / LRV ≈ 15.1%
  77. Sico

    1. 6054-65 Tango Red
      #c25056
      ΔE = 4.187 / LRV ≈ 17.9%
    2. 6056-65 Valentine Card
      #b44f51
      ΔE = 4.244 / LRV ≈ 15.9%
  78. Fired Earth

    1. Red Card
      #d12d36
      ΔE = 4.306 / LRV ≈ 15.7%
  79. Olympic

    1. Calypso Berry A33-6
      #bc424c
      ΔE = 4.320 / LRV ≈ 15.1%
    2. Wet Coral A28-5
      #c95a4c
      ΔE = 5.057 / LRV ≈ 20.3%
  80. Colorhouse

    1. Petal .06
      #ba4133
      ΔE = 4.365 / LRV ≈ 14.5%
  81. Sikkens

    1. B6.40.40
      #b54b50
      ΔE = 4.488 / LRV ≈ 15.4%
    2. B5.39.45 (RAL 3017)
      #c75359
      ΔE = 4.829 / LRV ≈ 19.1%
  82. Focoltone

    1. 3342
      #b25453
      ΔE = 4.497 / LRV ≈ 16.4%
  83. AMC

    1. Grenadier Red
      #bf3333
      ΔE = 4.586 / LRV ≈ 13.7%
    2. Mandarin Orange
      #c64430
      ΔE = 5.009 / LRV ≈ 16.4%
  84. KILZ

    1. Red Flare / B532
      #ac4d48
      ΔE = 4.615 / LRV ≈ 14.5%
  85. Vallejo

    1. Vallejo 70.829 #130
      #b34e3c
      ΔE = 4.623 / LRV ≈ 15.4%
    2. Vallejo 70.909 #28
      #ba4833
      ΔE = 5.023 / LRV ≈ 15.3%
  86. Games Workshop - Citadel

    1. Martian Ironearth
      #c15a4b
      ΔE = 4.624 / LRV ≈ 19.2%
    2. Squig Orange
      #aa4f44
      ΔE = 5.032 / LRV ≈ 14.6%
  87. Australian Standard AS2700

    1. R23 Lollipop
      #cc5057
      ΔE = 4.663 / LRV ≈ 19.3%
  88. Lascaux

    1. Transoxide red / 171
      #be3f2f
      ΔE = 4.844 / LRV ≈ 14.7%
  89. Beckers

    1. Lingon 688 / S 4249-Y88R
      #c85a4b
      ΔE = 5.066 / LRV ≈ 20.1%

Symulacja Daltonizmu

Monochromacy

Dichromacy

Trichromacy

#c44744 HTML & CSS Przykłady

#c44744 pierwszoplanowy

Słowo się rzekło, kobyłka u płotu.

<p style="color: #c44744">…</p>

#c44744 tło

Kwiat bez zapachu, jak człowiek bez duszy.

<p style="background-color: #c44744">…</p>

#c44744 cień tekstu

Panu Bogu świeczkę, a diabłu ogarek.

<p style="text-shadow: 0.1em 0.1em 0.15em #c44744">…</p>

Wykresy Kompozycji

Przestrzenie kolorów

Dziesiątkowy
12863300
Dwójkowy
11000100, 01000111, 01000100
Hexadecimal
#c44744
LRV
≈ 16.7%
Najbliższy krótki kolor szesnastkowy
#c44 ΔE = 1.479
RGB
rgb(196, 71, 68)
RGBA
rgba(196, 71, 68, 1.0)
rg chromatyczności
r: 0.585, g: 0.212, b: 0.203
RYB
czerwony: 76.863%, żółty: 27.871%, niebieski: 26.667%
Android / android.graphics.Color
-3913916 / 0xffc44744
HSL
hsl(1, 52%, 52%)
HSLA
hsla(1, 52%, 52%, 1.0)
HSV / HSB
barwa: 1° (1.406), nasycenie: 65% (0.653), wartość: 77% (0.769)
HSP
barwa: 1.406, nasycenie: 65.306%, postrzegana jasność: 47.985%
HSLuv (HUSL)
H: 12.962, S: 62.704, L: 47.833
Cubehelix
H: -6.828, S: 0.831, L: 0.424
TSL
T: 3.923, S: 0.375, L: 0.424
CMYK
cyjan: 0% (0.000), magenta: 64% (0.638), żółty: 65% (0.653), czarna: 23% (0.231)
CMY
cyjan: 23% (0.231), magenta: 72% (0.722), żółty: 73% (0.733)
XYZ
X: 26.064, Y: 16.663, Z: 7.312
xyY
x: 0.521, y: 0.333, Y: 16.663
CIELab
L: 47.833, a: 49.700, b: 28.765
CIELuv
L: 47.833, u: 94.566, v: 21.767
CIELCH / LCHab
L: 47.833, C: 57.424, H: 30.061
CIELUV / LCHuv
L: 47.833, C: 97.039, H: 12.962
Hunter-Lab
L: 40.821, a: 42.537, b: 17.955
CIECAM02
J: 40.126, C: 61.852, h: 25.059, Q: 124.803, M: 54.089, s: 65.833, H: 6.215
OSA-UCS
lekkość: -9.894, żółty: 3.550, zielony: -9.151
LMS
L: 25.071, M: 9.992, S: 7.495
YCbCr
Y: 108.820, Cb: 108.183, Cr: 183.088
YCoCg
Y: 101.500, Cg: -30.500, Co: 81.000
YDbDr
Y: 108.033, Db: -60.249, Dr: -167.276
YPbPr
Y: 97.409, Pb: -15.875, Pr: 62.638
xvYCC
Y: 99.657, Cb: 114.055, Cr: 183.023
YIQ
Y: 108.033, I: 75.428, Q: 25.499
YUV
Y: 108.033, U: -19.699, V: 77.175
System Koloru Munsell
5R 5/12 ΔE = 2.742
Kolor marki
YouTube ΔE = 5.119

Przypadkowe Kolory

Czerwony

Zielony

Niebieski