Colour

#18100F

#18100F
Red
Dark
Nearest: Black

#18100F is a red with RGB values 24, 16, 15 and HSL 7°, 23%, 8%. It is a dark colour, so white text on it reaches 18.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#18100F#18100F

HEX#18100F

RGBrgb(24, 16, 15)

RGB (0–1)0.0941, 0.0627, 0.0588

RGB percentages9.4%, 6.3%, 5.9%

HSLhsl(6.7, 23.1%, 7.6%)

HSV / HSBhsv(6.7, 37.5%, 9.4%)

CMYK0%, 33.3%, 37.5%, 90.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,576,975

CSS custom property--colour: #18100F;

Brightness & contrast

Relative luminance0.00599WCAG 2.x, 0 is black and 1 is white

Perceived brightness18.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 18.75:1

Contrast with white18.75:1WCAG normal text: AAA

Contrast with black1.12:1WCAG normal text: Fail

Greyscale equivalent#121212

Inverted#E7EFF0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#12110Fno red cones; affects about 1% of men; ΔE 3.3 from the original

Deuteranopia#13120Fno green cones; the most common form, about 1% of men; ΔE 3.4 from the original

Tritanopia#1A0F10no blue cones; rare, and affects men and women equally; ΔE 1.8 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text18.75:1WCAG large text: AAA

Contrast with black, large text1.12:1WCAG large text: Fail

Named colours

Black · ΔE 6.5 Dark slate grey · ΔE 30.3 Dim grey · ΔE 39.2 Gray · ΔE 48.3 Slate grey · ΔE 49.3 Dark olivegreen · ΔE 51.7

Nearest named CSS colourBlack (#000000)ΔE 6.53, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0F1718

Analogous#180F12, #18150F

Triadic#0F1810, #100F18

Split complementary#0F1814, #0F1318

Tetradic#12180F, #0F1718, #150F18

Tints, shades & saturation

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

Lighter +40%#96645D

Lighter +30%#764F4A

Lighter +20%#573A36

Lighter +10%#372523

Darker −10%#000000

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#1D0C0A

Less saturated −25%#141414

Channel breakdown

R24

G16

B15

Red24 (9.4%)

Green16 (6.3%)

Blue15 (5.9%)

Hue6.67°

Saturation (HSL)23.08%

Lightness7.65%

Dominant channelRed

Hex per channelR 18 · G 10 · B 0F

Keep nerding

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#18100F

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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