Colour

#66100E

#66100E
Red
Dark
Nearest: Maroon

#66100E is a red with RGB values 102, 16, 14 and HSL 1°, 76%, 23%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Maroon.

Colour values

#66100E#66100E

HEX#66100E

RGBrgb(102, 16, 14)

RGB (0–1)0.4, 0.0627, 0.0549

RGB percentages40%, 6.3%, 5.5%

HSLhsl(1.4, 75.9%, 22.7%)

HSV / HSBhsv(1.4, 86.3%, 40%)

CMYK0%, 84.3%, 86.3%, 60%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer6,688,782

CSS custom property--colour: #66100E;

Brightness & contrast

Relative luminance0.03227WCAG 2.x, 0 is black and 1 is white

Perceived brightness57.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 12.76:1

Contrast with white12.76:1WCAG normal text: AAA

Contrast with black1.65:1WCAG normal text: Fail

Greyscale equivalent#222222

Inverted#99EFF1

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2C260Dno red cones; affects about 1% of men; ΔE 39.6 from the original

Deuteranopia#41390Ano green cones; the most common form, about 1% of men; ΔE 39.8 from the original

Tritanopia#710011no blue cones; rare, and affects men and women equally; ΔE 7.4 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text12.76:1WCAG large text: AAA

Contrast with black, large text1.65:1WCAG large text: Fail

Named colours

Maroon · ΔE 17.3 Brown · ΔE 21.5 Dark red · ΔE 22.2 Saddle brown · ΔE 25 Sienna · ΔE 26.1 Firebrick · ΔE 28.9

Nearest named CSS colourMaroon (#800000)ΔE 17.28, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0E6466

Analogous#660E38, #663C0E

Triadic#0E6610, #100E66

Split complementary#0E663C, #0E3866

Tetradic#38660E, #0E6466, #3C0E66

Tints, shades & saturation

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

Lighter +40%#E85B58

Lighter +30%#E22F2B

Lighter +20%#C01E1A

Lighter +10%#931714

Darker −10%#390908

Darker −20%#0C0202

Darker −30%#000000

Darker −40%#000000

More saturated +25%#740300

Less saturated −25%#581E1D

Channel breakdown

R102

G16

B14

Red102 (40%)

Green16 (6.3%)

Blue14 (5.5%)

Hue1.36°

Saturation (HSL)75.86%

Lightness22.75%

Dominant channelRed

Hex per channelR 66 · G 10 · B 0E

Keep nerding

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#66100E

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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