Recognised as Colour

#AD2A23

#AD2A23
Red
Dark
Nearest: Firebrick

#AD2A23 is a red with RGB values 173, 42, 35 and HSL 3°, 66%, 41%. It is a dark colour, so white text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#AD2A23#AD2A23

HEX#AD2A23

RGBrgb(173, 42, 35)

RGB (0–1)0.6784, 0.1647, 0.1373

RGB percentages67.8%, 16.5%, 13.7%

HSLhsl(3, 66.3%, 40.8%)

HSV / HSBhsv(3, 79.8%, 67.8%)

CMYK0%, 75.7%, 79.8%, 32.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,348,515

CSS custom property--colour: #AD2A23;

Brightness & contrast

Relative luminance0.10662WCAG 2.x, 0 is black and 1 is white

Perceived brightness100.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.7:1

Contrast with white6.7:1WCAG normal text: AA

Contrast with black3.13:1WCAG normal text: Fail

Greyscale equivalent#454545

Inverted#52D5DC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#524A21no red cones; affects about 1% of men; ΔE 56.4 from the original

Deuteranopia#72661Dno green cones; the most common form, about 1% of men; ΔE 56.4 from the original

Tritanopia#BF002Ano blue cones; rare, and affects men and women equally; ΔE 13.4 from the original

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

Contrast with white, large text6.7:1WCAG large text: AAA

Contrast with black, large text3.13:1WCAG large text: AA

Named colours

Firebrick · ΔE 4.1 Brown · ΔE 6.7 Dark red · ΔE 11.9 Maroon · ΔE 14.1 Crimson · ΔE 20.8 Indian red · ΔE 21.7

Nearest named CSS colourFirebrick (#B22222)ΔE 4.08, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#23A6AD

Analogous#AD2361, #AD6F23

Triadic#23AD2A, #2A23AD

Split complementary#23AD6F, #2361AD

Tetradic#61AD23, #23A6AD, #6F23AD

Tints, shades & saturation

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

Lighter +40%#EFB1AD

Lighter +30%#E68883

Lighter +20%#DD5F59

Lighter +10%#D5372E

Darker −10%#83201A

Darker −20%#581512

Darker −30%#2E0B09

Darker −40%#030101

More saturated +25%#C71309

Less saturated −25%#93413D

Channel breakdown

R173

G42

B35

Red173 (67.8%)

Green42 (16.5%)

Blue35 (13.7%)

Hue3.04°

Saturation (HSL)66.35%

Lightness40.78%

Dominant channelRed

Hex per channelR AD · G 2A · B 23

Keep nerding

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

#AD2A23

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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