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Recognised as Colour

#15583B

  • #15583B
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#15583B is a cyan with RGB values 21, 88, 59 and HSL 154°, 61%, 21%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#15583B#15583B
HEX#15583B
RGBrgb(21, 88, 59)
RGB (0–1)0.0824, 0.3451, 0.2314
RGB percentages8.2%, 34.5%, 23.1%
HSLhsl(154, 61.5%, 21.4%)
HSV / HSBhsv(154, 76.1%, 34.5%)
CMYK76.1%, 0%, 33%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,398,843
CSS custom property--colour: #15583B;

Brightness & contrast

Relative luminance0.07455WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.43:1
Contrast with white8.43:1WCAG normal text: AAA
Contrast with black2.49:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#EAA7C4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#575139no red cones; affects about 1% of men; ΔE 27 from the original
Deuteranopia#4E4B3Dno green cones; the most common form, about 1% of men; ΔE 27 from the original
Tritanopia#005850no blue cones; rare, and affects men and women equally; ΔE 13.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.43:1WCAG large text: AAA
Contrast with black, large text2.49:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 22.3Sea green · ΔE 23.7Dark olivegreen · ΔE 23.8Teal · ΔE 24.8Dark cyan · ΔE 27.9Dim grey · ΔE 32.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 22.28, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#581532
Analogous#15581A, #155358
Triadic#3B1558, #583B15
Split complementary#581553, #581A15
Tetradic#1A1558, #581532, #535815

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#60D9A5
Lighter +30%#37CF8D
Lighter +20%#29AA72
Lighter +10%#1F8157
Darker −10%#0B2F1F
Darker −20%#010604
Darker −30%#000000
Darker −40%#000000
More saturated +25%#07663D
Less saturated −25%#234A39

Channel breakdown

R21
G88
B59
Red21 (8.2%)
Green88 (34.5%)
Blue59 (23.1%)
Hue154.03°
Saturation (HSL)61.47%
Lightness21.37%
Dominant channelGreen
Hex per channelR 15 · G 58 · B 3B

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Every value on this page was computed from “15583b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.