Colour

#66170D

#66170D
Red
Dark
Nearest: Maroon

#66170D is a red with RGB values 102, 23, 13 and HSL 7°, 77%, 23%. It is a dark colour, so white text on it reaches 12.4:1 contrast (AAA for normal text). The nearest named colour is Maroon.

Colour values

#66170D#66170D

HEX#66170D

RGBrgb(102, 23, 13)

RGB (0–1)0.4, 0.0902, 0.051

RGB percentages40%, 9%, 5.1%

HSLhsl(6.7, 77.4%, 22.5%)

HSV / HSBhsv(6.7, 87.3%, 40%)

CMYK0%, 77.5%, 87.3%, 60%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer6,690,573

CSS custom property--colour: #66170D;

Brightness & contrast

Relative luminance0.03467WCAG 2.x, 0 is black and 1 is white

Perceived brightness58.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 12.4:1

Contrast with white12.4:1WCAG normal text: AAA

Contrast with black1.69:1WCAG normal text: Fail

Greyscale equivalent#272727

Inverted#99E8F2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2F290Bno red cones; affects about 1% of men; ΔE 37.4 from the original

Deuteranopia#423B09no green cones; the most common form, about 1% of men; ΔE 38.1 from the original

Tritanopia#710016no blue cones; rare, and affects men and women equally; ΔE 10.9 from the original

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

Contrast with white, large text12.4:1WCAG large text: AAA

Contrast with black, large text1.69:1WCAG large text: Fail

Named colours

Maroon · ΔE 17.9 Brown · ΔE 22.1 Saddle brown · ΔE 22.4 Dark red · ΔE 22.7 Sienna · ΔE 24.2 Firebrick · ΔE 29.5

Nearest named CSS colourMaroon (#800000)ΔE 17.88, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0D5C66

Analogous#660D30, #66440D

Triadic#0D6617, #170D66

Split complementary#0D6643, #0D3066

Tetradic#2F660D, #0D5C66, #440D66

Tints, shades & saturation

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

Lighter +40%#E96656

Lighter +30%#E43D28

Lighter +20%#C02B19

Lighter +10%#932113

Darker −10%#390D07

Darker −20%#0C0301

Darker −30%#000000

Darker −40%#000000

More saturated +25%#730D00

Less saturated −25%#58221B

Channel breakdown

R102

G23

B13

Red102 (40%)

Green23 (9%)

Blue13 (5.1%)

Hue6.74°

Saturation (HSL)77.39%

Lightness22.55%

Dominant channelRed

Hex per channelR 66 · G 17 · B 0D

Keep nerding

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#66170D

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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