Colour

#1B3337

#1B3337
Cyan
Dark
Nearest: Dark slate grey

#1B3337 is a cyan with RGB values 27, 51, 55 and HSL 189°, 34%, 16%. It is a dark colour, so white text on it reaches 13.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1B3337#1B3337

HEX#1B3337

RGBrgb(27, 51, 55)

RGB (0–1)0.1059, 0.2, 0.2157

RGB percentages10.6%, 20%, 21.6%

HSLhsl(188.6, 34.1%, 16.1%)

HSV / HSBhsv(188.6, 50.9%, 21.6%)

CMYK50.9%, 7.3%, 0%, 78.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,782,583

CSS custom property--colour: #1B3337;

Brightness & contrast

Relative luminance0.02877WCAG 2.x, 0 is black and 1 is white

Perceived brightness45.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 13.33:1

Contrast with white13.33:1WCAG normal text: AAA

Contrast with black1.58:1WCAG normal text: Fail

Greyscale equivalent#2E2E2E

Inverted#E4CCC8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2F3137no red cones; affects about 1% of men; ΔE 8.8 from the original

Deuteranopia#2B2E37no green cones; the most common form, about 1% of men; ΔE 9.2 from the original

Tritanopia#0E3534no blue cones; rare, and affects men and women equally; ΔE 6 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text13.33:1WCAG large text: AAA

Contrast with black, large text1.58:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 12.4 Black · ΔE 21.8 Dim grey · ΔE 26.7 Slate grey · ΔE 34.2 Gray · ΔE 35.4 Teal · ΔE 35.6

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 12.4, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#371F1B

Analogous#1B372D, #1B2537

Triadic#371B33, #33371B

Split complementary#371B25, #372D1B

Tetradic#2D1B37, #371F1B, #25371B

Tints, shades & saturation

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

Lighter +40%#69AAB5

Lighter +30%#4D929E

Lighter +20%#3D727B

Lighter +10%#2C5359

Darker −10%#0A1315

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#113A41

Less saturated −25%#252C2D

Channel breakdown

R27

G51

B55

Red27 (10.6%)

Green51 (20%)

Blue55 (21.6%)

Hue188.57°

Saturation (HSL)34.15%

Lightness16.08%

Dominant channelBlue

Hex per channelR 1B · G 33 · B 37

Keep nerding

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#1B3337

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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