Colour

#15181F

#15181F
Blue
Dark
Nearest: Black

#15181F is a blue with RGB values 21, 24, 31 and HSL 222°, 19%, 10%. It is a dark colour, so white text on it reaches 17.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#15181F#15181F

HEX#15181F

RGBrgb(21, 24, 31)

RGB (0–1)0.0824, 0.0941, 0.1216

RGB percentages8.2%, 9.4%, 12.2%

HSLhsl(222, 19.2%, 10.2%)

HSV / HSBhsv(222, 32.3%, 12.2%)

CMYK32.3%, 22.6%, 0%, 87.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,382,431

CSS custom property--colour: #15181F;

Brightness & contrast

Relative luminance0.00912WCAG 2.x, 0 is black and 1 is white

Perceived brightness24.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.76:1

Contrast with white17.76:1WCAG normal text: AAA

Contrast with black1.18:1WCAG normal text: Fail

Greyscale equivalent#181818

Inverted#EAE7E0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#16181Fno red cones; affects about 1% of men; ΔE 0.5 from the original

Deuteranopia#15181Fno green cones; the most common form, about 1% of men; ΔE 0 from the original

Tritanopia#12191Ano blue cones; rare, and affects men and women equally; ΔE 5 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text17.76:1WCAG large text: AAA

Contrast with black, large text1.18:1WCAG large text: Fail

Named colours

Black · ΔE 9.8 Dark slate grey · ΔE 26.2 Dim grey · ΔE 36.6 Slate grey · ΔE 45 Gray · ΔE 45.7 Light slate grey · ΔE 48.1

Nearest named CSS colourBlack (#000000)ΔE 9.84, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#1F1C15

Analogous#151D1F, #17151F

Triadic#1F1518, #181F15

Split complementary#1F1715, #1D1F15

Tetradic#1F151D, #1F1C15, #151F17

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#687698

Lighter +30%#535F7A

Lighter +20%#3E475C

Lighter +10%#2A303D

Darker −10%#000001

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0F1526

Less saturated −25%#1A1A1A

Channel breakdown

R21

G24

B31

Red21 (8.2%)

Green24 (9.4%)

Blue31 (12.2%)

Hue222°

Saturation (HSL)19.23%

Lightness10.2%

Dominant channelBlue

Hex per channelR 15 · G 18 · B 1F

Keep nerding

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#15181F

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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