Recognised as Colour

#B21D30

#B21D30
Red
Dark
Nearest: Brown

#B21D30 is a red with RGB values 178, 29, 48 and HSL 352°, 72%, 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 Brown.

Colour values

#B21D30#B21D30

HEX#B21D30

RGBrgb(178, 29, 48)

RGB (0–1)0.698, 0.1137, 0.1882

RGB percentages69.8%, 11.4%, 18.8%

HSLhsl(352.3, 72%, 40.6%)

HSV / HSBhsv(352.3, 83.7%, 69.8%)

CMYK0%, 83.7%, 73%, 30.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,672,880

CSS custom property--colour: #B21D30;

Brightness & contrast

Relative luminance0.10557WCAG 2.x, 0 is black and 1 is white

Perceived brightness101.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.75:1

Contrast with white6.75:1WCAG normal text: AA

Contrast with black3.11:1WCAG normal text: Fail

Greyscale equivalent#3E3E3E

Inverted#4DE2CF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4D472Fno red cones; affects about 1% of men; ΔE 61.6 from the original

Deuteranopia#72672Bno green cones; the most common form, about 1% of men; ΔE 62 from the original

Tritanopia#C40026no blue cones; rare, and affects men and women equally; ΔE 13 from the original

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

Contrast with white, large text6.75:1WCAG large text: AAA

Contrast with black, large text3.11:1WCAG large text: AA

Named colours

Brown · ΔE 8.3 Firebrick · ΔE 8.8 Crimson · ΔE 16.2 Dark red · ΔE 17.6 Maroon · ΔE 18.7 Indian red · ΔE 20.7

Nearest named CSS colourBrown (#A52A2A)ΔE 8.27, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1DB29F

Analogous#B21D7B, #B2541D

Triadic#30B21D, #1D30B2

Split complementary#1DB254, #1D7BB2

Tetradic#7BB21D, #1DB29F, #541DB2

Tints, shades & saturation

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

Lighter +40%#F1AAB3

Lighter +30%#EA7E8C

Lighter +20%#E35265

Lighter +10%#DC263D

Darker −10%#861624

Darker −20%#5A0F18

Darker −30%#2E080D

Darker −40%#030001

More saturated +25%#CC031D

Less saturated −25%#983743

Channel breakdown

R178

G29

B48

Red178 (69.8%)

Green29 (11.4%)

Blue48 (18.8%)

Hue352.35°

Saturation (HSL)71.98%

Lightness40.59%

Dominant channelRed

Hex per channelR B2 · G 1D · B 30

Keep nerding

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

#B21D30

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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