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Recognised as Colour

#DD221F

  • #DD221F
  • Red
  • Dark
  • Nearest: Crimson

#DD221F is a red with RGB values 221, 34, 31 and HSL 1°, 75%, 49%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#DD221F#DD221F
HEX#DD221F
RGBrgb(221, 34, 31)
RGB (0–1)0.8667, 0.1333, 0.1216
RGB percentages86.7%, 13.3%, 12.2%
HSLhsl(0.9, 75.4%, 49.4%)
HSV / HSBhsv(0.9, 86%, 86.7%)
CMYK0%, 84.6%, 86%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer14,492,191
CSS custom property--colour: #DD221F;

Brightness & contrast

Relative luminance0.16615WCAG 2.x, 0 is black and 1 is white
Perceived brightness124.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.86:1
Contrast with white4.86:1WCAG normal text: AA
Contrast with black4.32:1WCAG normal text: Fail
Greyscale equivalent#4A4A4A
Inverted#22DDE0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#63581Bno red cones; affects about 1% of men; ΔE 73.6 from the original
Deuteranopia#8F7F11no green cones; the most common form, about 1% of men; ΔE 73.3 from the original
Tritanopia#F40025no blue cones; rare, and affects men and women equally; ΔE 10.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.86:1WCAG large text: AAA
Contrast with black, large text4.32:1WCAG large text: AA

Named colours

Crimson · ΔE 17Tomato · ΔE 18Firebrick · ΔE 19.5Orange red · ΔE 21.1Red · ΔE 21.5Dark red · ΔE 27.5
Nearest named CSS colourCrimson (#DC143C)ΔE 16.98, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1FDADD
Analogous#DD1F7B, #DD811F
Triadic#1FDD22, #221FDD
Split complementary#1FDD81, #1F7BDD
Tetradic#7BDD1F, #1FDADD, #811FDD

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F8D0D0
Lighter +30%#F2A4A3
Lighter +20%#EC7876
Lighter +10%#E64C49
Darker −10%#B01B19
Darker −20%#841412
Darker −30%#570D0C
Darker −40%#2A0606
More saturated +25%#FC0400
Less saturated −25%#BE413F

Channel breakdown

R221
G34
B31
Red221 (86.7%)
Green34 (13.3%)
Blue31 (12.2%)
Hue0.95°
Saturation (HSL)75.4%
Lightness49.41%
Dominant channelRed
Hex per channelR DD · G 22 · B 1F

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Every value on this page was computed from “dd221f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.