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Colour

#16171B

  • #16171B
  • Blue
  • Dark
  • Nearest: Black

#16171B is a blue with RGB values 22, 23, 27 and HSL 228°, 10%, 10%. It is a dark colour, so white text on it reaches 17.9:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#16171B#16171B
HEX#16171B
RGBrgb(22, 23, 27)
RGB (0–1)0.0863, 0.0902, 0.1059
RGB percentages8.6%, 9%, 10.6%
HSLhsl(228, 10.2%, 9.6%)
HSV / HSBhsv(228, 18.5%, 10.6%)
CMYK18.5%, 14.8%, 0%, 89.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,447,707
CSS custom property--colour: #16171B;

Brightness & contrast

Relative luminance0.00862WCAG 2.x, 0 is black and 1 is white
Perceived brightness23.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.91:1
Contrast with white17.91:1WCAG normal text: AAA
Contrast with black1.17:1WCAG normal text: Fail
Greyscale equivalent#171717
Inverted#E9E8E4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#16171Bno red cones; affects about 1% of men; ΔE 0 from the original
Deuteranopia#16171Bno green cones; the most common form, about 1% of men; ΔE 0 from the original
Tritanopia#151818no blue cones; rare, and affects men and women equally; ΔE 3.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.91:1WCAG large text: AAA
Contrast with black, large text1.17:1WCAG large text: Fail

Named colours

Black · ΔE 8.4Dark slate grey · ΔE 26.5Dim grey · ΔE 36.7Slate grey · ΔE 45.8Gray · ΔE 45.9Light slate grey · ΔE 48.9
Nearest named CSS colourBlack (#000000)ΔE 8.36, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1B1A16
Analogous#161A1B, #17161B
Triadic#1B1617, #171B16
Split complementary#1B1816, #191B16
Tetradic#1B161A, #1B1A16, #161B17

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#72778B
Lighter +30%#5B5F6F
Lighter +20%#444753
Lighter +10%#2D2F37
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#101321
Less saturated −25%#181818

Channel breakdown

R22
G23
B27
Red22 (8.6%)
Green23 (9%)
Blue27 (10.6%)
Hue228°
Saturation (HSL)10.2%
Lightness9.61%
Dominant channelBlue
Hex per channelR 16 · G 17 · B 1B

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Every value on this page was computed from “16171b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.