Colour

#12373C

#12373C
Cyan
Dark
Nearest: Dark slate grey

#12373C is a cyan with RGB values 18, 55, 60 and HSL 187°, 54%, 15%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#12373C#12373C

HEX#12373C

RGBrgb(18, 55, 60)

RGB (0–1)0.0706, 0.2157, 0.2353

RGB percentages7.1%, 21.6%, 23.5%

HSLhsl(187.1, 53.8%, 15.3%)

HSV / HSBhsv(187.1, 70%, 23.5%)

CMYK70%, 8.3%, 0%, 76.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,193,788

CSS custom property--colour: #12373C;

Brightness & contrast

Relative luminance0.03187WCAG 2.x, 0 is black and 1 is white

Perceived brightness47.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 12.82:1

Contrast with white12.82:1WCAG normal text: AAA

Contrast with black1.64:1WCAG normal text: Fail

Greyscale equivalent#2F2F2F

Inverted#EDC8C3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#32353Cno red cones; affects about 1% of men; ΔE 12 from the original

Deuteranopia#2C303Cno green cones; the most common form, about 1% of men; ΔE 12.8 from the original

Tritanopia#003A38no blue cones; rare, and affects men and women equally; ΔE 7.1 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text12.82:1WCAG large text: AAA

Contrast with black, large text1.64:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 11 Black · ΔE 24.6 Dim grey · ΔE 27.1 Teal · ΔE 32.7 Slate grey · ΔE 33.5 Gray · ΔE 35.4

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.01, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#3C1712

Analogous#123C2C, #12223C

Triadic#3C1237, #373C12

Split complementary#3C1222, #3C2C12

Tetradic#2C123C, #3C1712, #223C12

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#50BCCA

Lighter +30%#35A3B2

Lighter +20%#2A7F8A

Lighter +10%#1E5B63

Darker −10%#061315

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#083E46

Less saturated −25%#1C3032

Channel breakdown

R18

G55

B60

Red18 (7.1%)

Green55 (21.6%)

Blue60 (23.5%)

Hue187.14°

Saturation (HSL)53.85%

Lightness15.29%

Dominant channelBlue

Hex per channelR 12 · G 37 · B 3C

Keep nerding

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#12373C

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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