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Colour

#00171B

  • #00171B
  • Cyan
  • Dark
  • Nearest: Black

#00171B is a cyan with RGB values 0, 23, 27 and HSL 189°, 100%, 5%. 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

#00171B#00171B
HEX#00171B
RGBrgb(0, 23, 27)
RGB (0–1)0, 0.0902, 0.1059
RGB percentages0%, 9%, 10.6%
HSLhsl(188.9, 100%, 5.3%)
HSV / HSBhsv(188.9, 100%, 10.6%)
CMYK100%, 14.8%, 0%, 89.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,915
CSS custom property--colour: #00171B;

Brightness & contrast

Relative luminance0.00692WCAG 2.x, 0 is black and 1 is white
Perceived brightness19.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.45:1
Contrast with white18.45:1WCAG normal text: AAA
Contrast with black1.14:1WCAG normal text: Fail
Greyscale equivalent#121212
Inverted#FFE8E4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#14161Bno red cones; affects about 1% of men; ΔE 7 from the original
Deuteranopia#0F131Bno green cones; the most common form, about 1% of men; ΔE 6.9 from the original
Tritanopia#001918no blue cones; rare, and affects men and women equally; ΔE 4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.45:1WCAG large text: AAA
Contrast with black, large text1.14:1WCAG large text: Fail

Named colours

Black · ΔE 10.4Dark slate grey · ΔE 25.6Dim grey · ΔE 39.1Slate grey · ΔE 47.1Teal · ΔE 47.8Gray · ΔE 48.1
Nearest named CSS colourBlack (#000000)ΔE 10.4, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1B0400
Analogous#001B12, #00091B
Triadic#1B0017, #171B00
Split complementary#1B0009, #1B1200
Tetradic#12001B, #1B0400, #091B00

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#00C5E7
Lighter +30%#0099B4
Lighter +20%#006E81
Lighter +10%#00424E
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00171B
Less saturated −25%#031518

Channel breakdown

R0
G23
B27
Red0 (0%)
Green23 (9%)
Blue27 (10.6%)
Hue188.89°
Saturation (HSL)100%
Lightness5.29%
Dominant channelBlue
Hex per channelR 00 · G 17 · B 1B

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Every value on this page was computed from “00171b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.