Colour

#171F1D

#171F1D
Cyan
Dark
Nearest: Black

#171F1D is a cyan with RGB values 23, 31, 29 and HSL 165°, 15%, 11%. It is a dark colour, so white text on it reaches 16.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#171F1D#171F1D

HEX#171F1D

RGBrgb(23, 31, 29)

RGB (0–1)0.0902, 0.1216, 0.1137

RGB percentages9%, 12.2%, 11.4%

HSLhsl(165, 14.8%, 10.6%)

HSV / HSBhsv(165, 25.8%, 12.2%)

CMYK25.8%, 0%, 6.5%, 87.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,515,293

CSS custom property--colour: #171F1D;

Brightness & contrast

Relative luminance0.01251WCAG 2.x, 0 is black and 1 is white

Perceived brightness28.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.8:1

Contrast with white16.8:1WCAG normal text: AAA

Contrast with black1.25:1WCAG normal text: Fail

Greyscale equivalent#1D1D1D

Inverted#E8E0E2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#1E1E1Dno red cones; affects about 1% of men; ΔE 4 from the original

Deuteranopia#1D1D1Dno green cones; the most common form, about 1% of men; ΔE 4.2 from the original

Tritanopia#151F1Eno blue cones; rare, and affects men and women equally; ΔE 1.1 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text16.8:1WCAG large text: AAA

Contrast with black, large text1.25:1WCAG large text: Fail

Named colours

Black · ΔE 11.7 Dark slate grey · ΔE 22 Dim grey · ΔE 33.7 Gray · ΔE 42.9 Slate grey · ΔE 43.3 Teal · ΔE 45.6

Nearest named CSS colourBlack (#000000)ΔE 11.7, a distinctly different colour

Hue familycyan

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1F1719

Analogous#171F19, #171D1F

Triadic#1D171F, #1F1D17

Split complementary#1F171D, #1F1917

Tetradic#19171F, #1F1719, #1D1F17

Tints, shades & saturation

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

Lighter +40%#6E948A

Lighter +30%#58776F

Lighter +20%#425A54

Lighter +10%#2D3C38

Darker −10%#010202

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#102620

Less saturated −25%#1B1B1B

Channel breakdown

R23

G31

B29

Red23 (9%)

Green31 (12.2%)

Blue29 (11.4%)

Hue165°

Saturation (HSL)14.81%

Lightness10.59%

Dominant channelGreen

Hex per channelR 17 · G 1F · B 1D

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#171F1D

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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