Colour

#8B0000

#8B0000
Red
Dark
Named: Dark red

#8B0000 is the CSS colour red with RGB values 139, 0, 0 and HSL 0°, 100%, 27%. It is a dark colour, so white text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Dark red.

Colour values

#8B0000#8B0000

HEX#8B0000

RGBrgb(139, 0, 0)

RGB (0–1)0.5451, 0, 0

RGB percentages54.5%, 0%, 0%

HSLhsl(0, 100%, 27.3%)

HSV / HSBhsv(0, 100%, 54.5%)

CMYK0%, 100%, 100%, 45.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer9,109,504

CSS custom property--colour: #8B0000;

Brightness & contrast

Relative luminance0.05489WCAG 2.x, 0 is black and 1 is white

Perceived brightness76 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 10.01:1

Contrast with white10.01:1WCAG normal text: AAA

Contrast with black2.1:1WCAG normal text: Fail

Greyscale equivalent#1E1E1E

Inverted#74FFFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#383000no red cones; affects about 1% of men; ΔE 55.5 from the original

Deuteranopia#574C00no green cones; the most common form, about 1% of men; ΔE 54.5 from the original

Tritanopia#9A0004no blue cones; rare, and affects men and women equally; ΔE 5.8 from the original

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

Contrast with white, large text10.01:1WCAG large text: AAA

Contrast with black, large text2.1:1WCAG large text: Fail

Named colours

Dark red · ΔE 0 Maroon · ΔE 5.1 Firebrick · ΔE 12.6 Brown · ΔE 14.4 Saddle brown · ΔE 26.3 Sienna · ΔE 27.4

This is a named CSS colourDark red (#8B0000)exact match

Hue familyred

CSS keyword usabledarkred

Colour harmonies

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

Complementary#008B8B

Analogous#8B0046, #8B4600

Triadic#008B00, #00008B

Split complementary#008B46, #00468B

Tetradic#468B00, #008B8B, #46008B

Tints, shades & saturation

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

Lighter +40%#FF5858

Lighter +30%#FF2525

Lighter +20%#F10000

Lighter +10%#BE0000

Darker −10%#580000

Darker −20%#250000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#8B0000

Less saturated −25%#7A1111

Channel breakdown

R139

Red139 (54.5%)

Green0 (0%)

Blue0 (0%)

Hue0°

Saturation (HSL)100%

Lightness27.25%

Dominant channelRed

Hex per channelR 8B · G 00 · B 00

Keep nerding

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#8B0000

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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