Colour

#DD0037

#DD0037
Red
Dark
Nearest: Crimson

#DD0037 is a red with RGB values 221, 0, 55 and HSL 345°, 100%, 43%. It is a dark colour, so white text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#DD0037#DD0037

HEX#DD0037

RGBrgb(221, 0, 55)

RGB (0–1)0.8667, 0, 0.2157

RGB percentages86.7%, 0%, 21.6%

HSLhsl(345.1, 100%, 43.3%)

HSV / HSBhsv(345.1, 100%, 86.7%)

CMYK0%, 100%, 75.1%, 13.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer14,483,511

CSS custom property--colour: #DD0037;

Brightness & contrast

Relative luminance0.15648WCAG 2.x, 0 is black and 1 is white

Perceived brightness122.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.09:1

Contrast with white5.09:1WCAG normal text: AA

Contrast with black4.13:1WCAG normal text: Fail

Greyscale equivalent#333333

Inverted#22FFC8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5A5336no red cones; affects about 1% of men; ΔE 77.9 from the original

Deuteranopia#8B7D2Fno green cones; the most common form, about 1% of men; ΔE 77.8 from the original

Tritanopia#F40021no blue cones; rare, and affects men and women equally; ΔE 19.2 from the original

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

Contrast with white, large text5.09:1WCAG large text: AAA

Contrast with black, large text4.13:1WCAG large text: AA

Named colours

Crimson · ΔE 3.2 Firebrick · ΔE 18.6 Tomato · ΔE 24.1 Brown · ΔE 25.5 Dark red · ΔE 29.1 Indian red · ΔE 32.1

Nearest named CSS colourCrimson (#DC143C)ΔE 3.17, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00DDA6

Analogous#DD00A6, #DD3700

Triadic#37DD00, #0037DD

Split complementary#00DD37, #00A6DD

Tetradic#A6DD00, #00DDA6, #3800DD

Tints, shades & saturation

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

Lighter +40%#FFAABF

Lighter +30%#FF7799

Lighter +20%#FF4473

Lighter +10%#FF114C

Darker −10%#AA002A

Darker −20%#77001E

Darker −30%#440011

Darker −40%#110004

More saturated +25%#DD0037

Less saturated −25%#C11C45

Channel breakdown

R221

B55

Red221 (86.7%)

Green0 (0%)

Blue55 (21.6%)

Hue345.07°

Saturation (HSL)100%

Lightness43.33%

Dominant channelRed

Hex per channelR DD · G 00 · B 37

Keep nerding

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

#DD0037

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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