Recognised as Colour

#AD251D

#AD251D
Red
Dark
Nearest: Firebrick

#AD251D is a red with RGB values 173, 37, 29 and HSL 3°, 71%, 40%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#AD251D#AD251D

HEX#AD251D

RGBrgb(173, 37, 29)

RGB (0–1)0.6784, 0.1451, 0.1137

RGB percentages67.8%, 14.5%, 11.4%

HSLhsl(3.3, 71.3%, 39.6%)

HSV / HSBhsv(3.3, 83.2%, 67.8%)

CMYK0%, 78.6%, 83.2%, 32.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,347,229

CSS custom property--colour: #AD251D;

Brightness & contrast

Relative luminance0.10296WCAG 2.x, 0 is black and 1 is white

Perceived brightness99.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.86:1

Contrast with white6.86:1WCAG normal text: AA

Contrast with black3.06:1WCAG normal text: Fail

Greyscale equivalent#414141

Inverted#52DAE2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#50471Ano red cones; affects about 1% of men; ΔE 57.7 from the original

Deuteranopia#716516no green cones; the most common form, about 1% of men; ΔE 58.1 from the original

Tritanopia#BF0025no blue cones; rare, and affects men and women equally; ΔE 11.9 from the original

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

Contrast with white, large text6.86:1WCAG large text: AAA

Contrast with black, large text3.06:1WCAG large text: AA

Named colours

Firebrick · ΔE 3.1 Brown · ΔE 9.6 Dark red · ΔE 10.7 Maroon · ΔE 14 Crimson · ΔE 20.4 Indian red · ΔE 24.4

Nearest named CSS colourFirebrick (#B22222)ΔE 3.11, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1DA5AD

Analogous#AD1D5D, #AD6D1D

Triadic#1DAD25, #251DAD

Split complementary#1DAD6D, #1D5DAD

Tetradic#5DAD1D, #1DA5AD, #6D1DAD

Tints, shades & saturation

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

Lighter +40%#F0AAA6

Lighter +30%#E9807A

Lighter +20%#E1574F

Lighter +10%#D92E24

Darker −10%#811C16

Darker −20%#56120E

Darker −30%#2A0907

Darker −40%#000000

More saturated +25%#C60F04

Less saturated −25%#943B36

Channel breakdown

R173

G37

B29

Red173 (67.8%)

Green37 (14.5%)

Blue29 (11.4%)

Hue3.33°

Saturation (HSL)71.29%

Lightness39.61%

Dominant channelRed

Hex per channelR AD · G 25 · B 1D

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#AD251D

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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