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Colour

#15171E

  • #15171E
  • Blue
  • Dark
  • Nearest: Black

#15171E is a blue with RGB values 21, 23, 30 and HSL 227°, 18%, 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

#15171E#15171E
HEX#15171E
RGBrgb(21, 23, 30)
RGB (0–1)0.0824, 0.0902, 0.1176
RGB percentages8.2%, 9%, 11.8%
HSLhsl(226.7, 17.6%, 10%)
HSV / HSBhsv(226.7, 30%, 11.8%)
CMYK30%, 23.3%, 0%, 88.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,382,174
CSS custom property--colour: #15171E;

Brightness & contrast

Relative luminance0.00866WCAG 2.x, 0 is black and 1 is white
Perceived brightness23.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.9:1
Contrast with white17.9:1WCAG normal text: AAA
Contrast with black1.17:1WCAG normal text: Fail
Greyscale equivalent#171717
Inverted#EAE8E1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#15181Eno red cones; affects about 1% of men; ΔE 1 from the original
Deuteranopia#14171Eno green cones; the most common form, about 1% of men; ΔE 0.5 from the original
Tritanopia#131819no blue cones; rare, and affects men and women equally; ΔE 4.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.9:1WCAG large text: AAA
Contrast with black, large text1.17:1WCAG large text: Fail

Named colours

Black · ΔE 9.5Dark slate grey · ΔE 26.8Dim grey · ΔE 37Slate grey · ΔE 45.4Gray · ΔE 46.1Light slate grey · ΔE 48.6
Nearest named CSS colourBlack (#000000)ΔE 9.47, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1E1C15
Analogous#151C1E, #17151E
Triadic#1E1517, #171E15
Split complementary#1E1715, #1C1E15
Tetradic#1E151C, #1E1C15, #151E17

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#697396
Lighter +30%#545C78
Lighter +20%#3F455A
Lighter +10%#2A2E3C
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F1324
Less saturated −25%#1A1A1A

Channel breakdown

R21
G23
B30
Red21 (8.2%)
Green23 (9%)
Blue30 (11.8%)
Hue226.67°
Saturation (HSL)17.65%
Lightness10%
Dominant channelBlue
Hex per channelR 15 · G 17 · B 1E

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Every value on this page was computed from “15171e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.