Recognised as Colour

#AD2321

#AD2321
Red
Dark
Nearest: Firebrick

#AD2321 is a red with RGB values 173, 35, 33 and HSL 1°, 68%, 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

#AD2321#AD2321

HEX#AD2321

RGBrgb(173, 35, 33)

RGB (0–1)0.6784, 0.1373, 0.1294

RGB percentages67.8%, 13.7%, 12.9%

HSLhsl(0.9, 68%, 40.4%)

HSV / HSBhsv(0.9, 80.9%, 67.8%)

CMYK0%, 79.8%, 80.9%, 32.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,346,721

CSS custom property--colour: #AD2321;

Brightness & contrast

Relative luminance0.10196WCAG 2.x, 0 is black and 1 is white

Perceived brightness99 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.91:1

Contrast with white6.91:1WCAG normal text: AA

Contrast with black3.04:1WCAG normal text: Fail

Greyscale equivalent#404040

Inverted#52DCDE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4F471Fno red cones; affects about 1% of men; ΔE 58.6 from the original

Deuteranopia#71651Ano green cones; the most common form, about 1% of men; ΔE 58.7 from the original

Tritanopia#BF0025no blue cones; rare, and affects men and women equally; ΔE 11.1 from the original

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

Contrast with white, large text6.91:1WCAG large text: AAA

Contrast with black, large text3.04:1WCAG large text: AA

Named colours

Firebrick · ΔE 2.1 Brown · ΔE 7.8 Dark red · ΔE 11.4 Maroon · ΔE 14.1 Crimson · ΔE 19.3 Indian red · ΔE 23.2

Nearest named CSS colourFirebrick (#B22222)ΔE 2.14, below the just-noticeable difference

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#21ABAD

Analogous#AD2165, #AD6921

Triadic#21AD23, #2321AD

Split complementary#21AD69, #2165AD

Tetradic#65AD21, #21ABAD, #6921AD

Tints, shades & saturation

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

Lighter +40%#EFACAB

Lighter +30%#E78280

Lighter +20%#DF5755

Lighter +10%#D62D2B

Darker −10%#821A19

Darker −20%#571211

Darker −30%#2D0908

Darker −40%#020000

More saturated +25%#C70A07

Less saturated −25%#933C3B

Channel breakdown

R173

G35

B33

Red173 (67.8%)

Green35 (13.7%)

Blue33 (12.9%)

Hue0.86°

Saturation (HSL)67.96%

Lightness40.39%

Dominant channelRed

Hex per channelR AD · G 23 · B 21

Keep nerding

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

#AD2321

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

Nerdulate something else