Colour

#42172B

#42172B
Red
Dark
Nearest: Black

#42172B is a red with RGB values 66, 23, 43 and HSL 332°, 48%, 17%. It is a dark colour, so white text on it reaches 15.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#42172B#42172B

HEX#42172B

RGBrgb(66, 23, 43)

RGB (0–1)0.2588, 0.0902, 0.1686

RGB percentages25.9%, 9%, 16.9%

HSLhsl(332.1, 48.3%, 17.5%)

HSV / HSBhsv(332.1, 65.2%, 25.9%)

CMYK0%, 65.2%, 34.8%, 74.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,331,307

CSS custom property--colour: #42172B;

Brightness & contrast

Relative luminance0.01945WCAG 2.x, 0 is black and 1 is white

Perceived brightness42.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 15.12:1

Contrast with white15.12:1WCAG normal text: AAA

Contrast with black1.39:1WCAG normal text: Fail

Greyscale equivalent#222222

Inverted#BDE8D4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#1D212Cno red cones; affects about 1% of men; ΔE 22.6 from the original

Deuteranopia#29292Ano green cones; the most common form, about 1% of men; ΔE 23.3 from the original

Tritanopia#47151Fno blue cones; rare, and affects men and women equally; ΔE 9.2 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text15.12:1WCAG large text: AAA

Contrast with black, large text1.39:1WCAG large text: Fail

Named colours

Black · ΔE 28 Dim grey · ΔE 37.5 Dark slate grey · ΔE 38.6 Dark slateblue · ΔE 42.1 Gray · ΔE 45 Slate grey · ΔE 46.1

Nearest named CSS colourBlack (#000000)ΔE 28.03, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17422E

Analogous#421741, #421817

Triadic#2B4217, #172B42

Split complementary#174218, #174142

Tetradic#414217, #17422E, #191742

Tints, shades & saturation

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

Lighter +40%#C75E8F

Lighter +30%#B33F75

Lighter +20%#8E315C

Lighter +10%#682444

Darker −10%#1C0A12

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#4D0C2A

Less saturated −25%#37222C

Channel breakdown

R66

G23

B43

Red66 (25.9%)

Green23 (9%)

Blue43 (16.9%)

Hue332.09°

Saturation (HSL)48.31%

Lightness17.45%

Dominant channelRed

Hex per channelR 42 · G 17 · B 2B

Keep nerding

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#42172B

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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