Colour

#66180D

#66180D
Red
Dark
Nearest: Maroon

#66180D is a red with RGB values 102, 24, 13 and HSL 7°, 77%, 23%. It is a dark colour, so white text on it reaches 12.3:1 contrast (AAA for normal text). The nearest named colour is Maroon.

Colour values

#66180D#66180D

HEX#66180D

RGBrgb(102, 24, 13)

RGB (0–1)0.4, 0.0941, 0.051

RGB percentages40%, 9.4%, 5.1%

HSLhsl(7.4, 77.4%, 22.5%)

HSV / HSBhsv(7.4, 87.3%, 40%)

CMYK0%, 76.5%, 87.3%, 60%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer6,690,829

CSS custom property--colour: #66180D;

Brightness & contrast

Relative luminance0.03507WCAG 2.x, 0 is black and 1 is white

Perceived brightness58.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 12.34:1

Contrast with white12.34:1WCAG normal text: AAA

Contrast with black1.7:1WCAG normal text: Fail

Greyscale equivalent#282828

Inverted#99E7F2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#302A0Bno red cones; affects about 1% of men; ΔE 37 from the original

Deuteranopia#433B09no green cones; the most common form, about 1% of men; ΔE 37.1 from the original

Tritanopia#710016no blue cones; rare, and affects men and women equally; ΔE 11.3 from the original

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

Contrast with white, large text12.34:1WCAG large text: AAA

Contrast with black, large text1.7:1WCAG large text: Fail

Named colours

Maroon · ΔE 18.1 Saddle brown · ΔE 22.1 Brown · ΔE 22.3 Dark red · ΔE 22.9 Sienna · ΔE 23.9 Firebrick · ΔE 29.7

Nearest named CSS colourMaroon (#800000)ΔE 18.07, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0D5B66

Analogous#660D2F, #66440D

Triadic#0D6618, #180D66

Split complementary#0D6645, #0D2E66

Tetradic#2E660D, #0D5B66, #450D66

Tints, shades & saturation

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

Lighter +40%#E96856

Lighter +30%#E44028

Lighter +20%#C02D19

Lighter +10%#932313

Darker −10%#390D07

Darker −20%#0C0301

Darker −30%#000000

Darker −40%#000000

More saturated +25%#730E00

Less saturated −25%#58231B

Channel breakdown

R102

G24

B13

Red102 (40%)

Green24 (9.4%)

Blue13 (5.1%)

Hue7.42°

Saturation (HSL)77.39%

Lightness22.55%

Dominant channelRed

Hex per channelR 66 · G 18 · B 0D

Keep nerding

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#66180D

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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