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Recognised as Colour

#00171A

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

#00171A is a cyan with RGB values 0, 23, 26 and HSL 187°, 100%, 5%. It is a dark colour, so white text on it reaches 18.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#00171A#00171A
HEX#00171A
RGBrgb(0, 23, 26)
RGB (0–1)0, 0.0902, 0.102
RGB percentages0%, 9%, 10.2%
HSLhsl(186.9, 100%, 5.1%)
HSV / HSBhsv(186.9, 100%, 10.2%)
CMYK100%, 11.5%, 0%, 89.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,914
CSS custom property--colour: #00171A;

Brightness & contrast

Relative luminance0.00687WCAG 2.x, 0 is black and 1 is white
Perceived brightness19.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.46:1
Contrast with white18.46:1WCAG normal text: AAA
Contrast with black1.14:1WCAG normal text: Fail
Greyscale equivalent#121212
Inverted#FFE8E5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#14161Ano red cones; affects about 1% of men; ΔE 7 from the original
Deuteranopia#10121Ano green cones; the most common form, about 1% of men; ΔE 7.9 from the original
Tritanopia#001918no blue cones; rare, and affects men and women equally; ΔE 3.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.46:1WCAG large text: AAA
Contrast with black, large text1.14:1WCAG large text: Fail

Named colours

Black · ΔE 10.2Dark slate grey · ΔE 25.6Dim grey · ΔE 39.1Slate grey · ΔE 47.2Teal · ΔE 47.7Gray · ΔE 48.1
Nearest named CSS colourBlack (#000000)ΔE 10.21, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1A0300
Analogous#001A10, #000A1A
Triadic#1A0017, #171A00
Split complementary#1A000A, #1A1000
Tetradic#10001A, #1A0300, #0A1A00

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#00CBE6
Lighter +30%#009EB3
Lighter +20%#007180
Lighter +10%#00444D
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00171A
Less saturated −25%#031517

Channel breakdown

R0
G23
B26
Red0 (0%)
Green23 (9%)
Blue26 (10.2%)
Hue186.92°
Saturation (HSL)100%
Lightness5.1%
Dominant channelBlue
Hex per channelR 00 · G 17 · B 1A

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