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Recognised as Colour

#288C68

  • #288C68
  • Cyan
  • Dark
  • Nearest: Sea green

#288C68 is a cyan with RGB values 40, 140, 104 and HSL 158°, 56%, 35%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Sea green.

Colour values

#288C68#288C68
HEX#288C68
RGBrgb(40, 140, 104)
RGB (0–1)0.1569, 0.549, 0.4078
RGB percentages15.7%, 54.9%, 40.8%
HSLhsl(158.4, 55.6%, 35.3%)
HSV / HSBhsv(158.4, 71.4%, 54.9%)
CMYK71.4%, 0%, 25.7%, 45.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,657,384
CSS custom property--colour: #288C68;

Brightness & contrast

Relative luminance0.20207WCAG 2.x, 0 is black and 1 is white
Perceived brightness115 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.04:1
Contrast with white4.17:1WCAG normal text: Fail
Contrast with black5.04:1WCAG normal text: AA
Greyscale equivalent#747474
Inverted#D77397

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#898266no red cones; affects about 1% of men; ΔE 35.7 from the original
Deuteranopia#7C786Ano green cones; the most common form, about 1% of men; ΔE 36.5 from the original
Tritanopia#008C82no blue cones; rare, and affects men and women equally; ΔE 15.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.17:1WCAG large text: AA
Contrast with black, large text5.04:1WCAG large text: AAA

Named colours

Sea green · ΔE 9.2Dark cyan · ΔE 21.2Medium seagreen · ΔE 21.5Teal · ΔE 21.7Light seagreen · ΔE 22.2Medium aquamarine · ΔE 23.8
Nearest named CSS colourSea green (#2E8B57)ΔE 9.24, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8C284C
Analogous#288C36, #287E8C
Triadic#68288C, #8C6828
Split complementary#8C287E, #8C3628
Tetradic#36288C, #8C284C, #7E8C28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9DE3CA
Lighter +30%#75D8B4
Lighter +20%#4ECC9F
Lighter +10%#33B485
Darker −10%#1D644B
Darker −20%#113D2D
Darker −30%#061510
Darker −40%#000000
More saturated +25%#11A36E
Less saturated −25%#3F7662

Channel breakdown

R40
G140
B104
Red40 (15.7%)
Green140 (54.9%)
Blue104 (40.8%)
Hue158.4°
Saturation (HSL)55.56%
Lightness35.29%
Dominant channelGreen
Hex per channelR 28 · G 8C · B 68

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Every value on this page was computed from “288c68” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.