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Recognised as Colour

#00171F

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

#00171F is a cyan with RGB values 0, 23, 31 and HSL 195°, 100%, 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

#00171F#00171F
HEX#00171F
RGBrgb(0, 23, 31)
RGB (0–1)0, 0.0902, 0.1216
RGB percentages0%, 9%, 12.2%
HSLhsl(195.5, 100%, 6.1%)
HSV / HSBhsv(195.5, 100%, 12.2%)
CMYK100%, 25.8%, 0%, 87.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,919
CSS custom property--colour: #00171F;

Brightness & contrast

Relative luminance0.00712WCAG 2.x, 0 is black and 1 is white
Perceived brightness20.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.38:1
Contrast with white18.38:1WCAG normal text: AAA
Contrast with black1.14:1WCAG normal text: Fail
Greyscale equivalent#131313
Inverted#FFE8E0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#12161Fno red cones; affects about 1% of men; ΔE 6.1 from the original
Deuteranopia#0E131Fno green cones; the most common form, about 1% of men; ΔE 6.5 from the original
Tritanopia#00191Ano blue cones; rare, and affects men and women equally; ΔE 5.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.38:1WCAG large text: AAA
Contrast with black, large text1.14:1WCAG large text: Fail

Named colours

Black · ΔE 11.6Dark slate grey · ΔE 26.1Dim grey · ΔE 39.2Slate grey · ΔE 46.6Teal · ΔE 48.1Gray · ΔE 48.1
Nearest named CSS colourBlack (#000000)ΔE 11.59, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1F0800
Analogous#001F18, #00071F
Triadic#1F0017, #171F00
Split complementary#1F0007, #1F1800
Tetradic#18001F, #1F0800, #071F00

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#00AEEB
Lighter +30%#0089B8
Lighter +20%#006385
Lighter +10%#003D52
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00171F
Less saturated −25%#04151B

Channel breakdown

R0
G23
B31
Red0 (0%)
Green23 (9%)
Blue31 (12.2%)
Hue195.48°
Saturation (HSL)100%
Lightness6.08%
Dominant channelBlue
Hex per channelR 00 · G 17 · B 1F

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