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Colour

#04171B

  • #04171B
  • Cyan
  • Dark
  • Nearest: Black

#04171B is a cyan with RGB values 4, 23, 27 and HSL 190°, 74%, 6%. It is a dark colour, so white text on it reaches 18.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#04171B#04171B
HEX#04171B
RGBrgb(4, 23, 27)
RGB (0–1)0.0157, 0.0902, 0.1059
RGB percentages1.6%, 9%, 10.6%
HSLhsl(190.4, 74.2%, 6.1%)
HSV / HSBhsv(190.4, 85.2%, 10.6%)
CMYK85.2%, 14.8%, 0%, 89.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer268,059
CSS custom property--colour: #04171B;

Brightness & contrast

Relative luminance0.00718WCAG 2.x, 0 is black and 1 is white
Perceived brightness20 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.36:1
Contrast with white18.36:1WCAG normal text: AAA
Contrast with black1.14:1WCAG normal text: Fail
Greyscale equivalent#131313
Inverted#FBE8E4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#14161Bno red cones; affects about 1% of men; ΔE 5.9 from the original
Deuteranopia#10131Bno green cones; the most common form, about 1% of men; ΔE 6.2 from the original
Tritanopia#001918no blue cones; rare, and affects men and women equally; ΔE 4.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.36:1WCAG large text: AAA
Contrast with black, large text1.14:1WCAG large text: Fail

Named colours

Black · ΔE 9.8Dark slate grey · ΔE 25.6Dim grey · ΔE 38.6Slate grey · ΔE 46.8Gray · ΔE 47.7Teal · ΔE 48.1
Nearest named CSS colourBlack (#000000)ΔE 9.75, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1B0804
Analogous#041B13, #040C1B
Triadic#1B0417, #171B04
Split complementary#1B040C, #1B1304
Tetradic#13041B, #1B0804, #0C1B04

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1EAECD
Lighter +30%#1889A0
Lighter +20%#116374
Lighter +10%#0B3D47
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#001A1F
Less saturated −25%#081417

Channel breakdown

R4
G23
B27
Red4 (1.6%)
Green23 (9%)
Blue27 (10.6%)
Hue190.43°
Saturation (HSL)74.19%
Lightness6.08%
Dominant channelBlue
Hex per channelR 04 · G 17 · B 1B

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Every value on this page was computed from “04171b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.