Colour

#42001D

#42001D
Red
Dark
Nearest: Black

#42001D is a red with RGB values 66, 0, 29 and HSL 334°, 100%, 13%. It is a dark colour, so white text on it reaches 16.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#42001D#42001D

HEX#42001D

RGBrgb(66, 0, 29)

RGB (0–1)0.2588, 0, 0.1137

RGB percentages25.9%, 0%, 11.4%

HSLhsl(333.6, 100%, 12.9%)

HSV / HSBhsv(333.6, 100%, 25.9%)

CMYK0%, 100%, 56.1%, 74.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,325,405

CSS custom property--colour: #42001D;

Brightness & contrast

Relative luminance0.01247WCAG 2.x, 0 is black and 1 is white

Perceived brightness37.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.81:1

Contrast with white16.81:1WCAG normal text: AAA

Contrast with black1.25:1WCAG normal text: Fail

Greyscale equivalent#101010

Inverted#BDFFE2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#11151Eno red cones; affects about 1% of men; ΔE 32.5 from the original

Deuteranopia#23221Bno green cones; the most common form, about 1% of men; ΔE 33.5 from the original

Tritanopia#49000Dno blue cones; rare, and affects men and women equally; ΔE 12.9 from the original

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

Contrast with white, large text16.81:1WCAG large text: AAA

Contrast with black, large text1.25:1WCAG large text: Fail

Named colours

Black · ΔE 33.9 Maroon · ΔE 42.9 Brown · ΔE 43.5 Dim grey · ΔE 46.4 Dark red · ΔE 47.7 Dark slateblue · ΔE 47.8

Nearest named CSS colourBlack (#000000)ΔE 33.93, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#004225

Analogous#42003E, #420400

Triadic#1D4200, #001D42

Split complementary#004204, #003E42

Tetradic#3E4200, #004225, #040042

Tints, shades & saturation

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

Lighter +40%#FF0F78

Lighter +30%#DB0060

Lighter +20%#A8004A

Lighter +10%#750033

Darker −10%#0F0007

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#42001D

Less saturated −25%#3A081E

Channel breakdown

R66

B29

Red66 (25.9%)

Green0 (0%)

Blue29 (11.4%)

Hue333.64°

Saturation (HSL)100%

Lightness12.94%

Dominant channelRed

Hex per channelR 42 · G 00 · B 1D

Keep nerding

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#42001D

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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