Recognised as Colour

#550B21

#550B21
Red
Dark
Nearest: Brown

#550B21 is a red with RGB values 85, 11, 33 and HSL 342°, 77%, 19%. It is a dark colour, so white text on it reaches 14.4:1 contrast (AAA for normal text). The nearest named colour is Brown.

Colour values

#550B21#550B21

HEX#550B21

RGBrgb(85, 11, 33)

RGB (0–1)0.3333, 0.0431, 0.1294

RGB percentages33.3%, 4.3%, 12.9%

HSLhsl(342.2, 77.1%, 18.8%)

HSV / HSBhsv(342.2, 87.1%, 33.3%)

CMYK0%, 87.1%, 61.2%, 66.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,573,409

CSS custom property--colour: #550B21;

Brightness & contrast

Relative luminance0.0228WCAG 2.x, 0 is black and 1 is white

Perceived brightness48.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 14.42:1

Contrast with white14.42:1WCAG normal text: AAA

Contrast with black1.46:1WCAG normal text: Fail

Greyscale equivalent#1C1C1C

Inverted#AAF4DE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#202021no red cones; affects about 1% of men; ΔE 35.1 from the original

Deuteranopia#332F1Fno green cones; the most common form, about 1% of men; ΔE 35.7 from the original

Tritanopia#5E0015no blue cones; rare, and affects men and women equally; ΔE 11.2 from the original

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

Contrast with white, large text14.42:1WCAG large text: AAA

Contrast with black, large text1.46:1WCAG large text: Fail

Named colours

Brown · ΔE 34.9 Maroon · ΔE 35 Black · ΔE 38.7 Sienna · ΔE 39.5 Dark red · ΔE 39.7 Saddle brown · ΔE 40.4

Nearest named CSS colourBrown (#A52A2A)ΔE 34.87, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0B553F

Analogous#550B46, #551A0B

Triadic#21550B, #0B2155

Split complementary#0B551A, #0B4655

Tetradic#46550B, #0B553F, #1A0B55

Tints, shades & saturation

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

Lighter +40%#E74575

Lighter +30%#DC1D56

Lighter +20%#AF1744

Lighter +10%#821133

Darker −10%#28050F

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#60001D

Less saturated −25%#491726

Channel breakdown

R85

G11

B33

Red85 (33.3%)

Green11 (4.3%)

Blue33 (12.9%)

Hue342.16°

Saturation (HSL)77.08%

Lightness18.82%

Dominant channelRed

Hex per channelR 55 · G 0B · B 21

Keep nerding

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

#550B21

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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