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Recognised as Colour

#22100D

  • #22100D
  • Red
  • Dark
  • Nearest: Black

#22100D is a red with RGB values 34, 16, 13 and HSL 9°, 45%, 9%. It is a dark colour, so white text on it reaches 18.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#22100D#22100D
HEX#22100D
RGBrgb(34, 16, 13)
RGB (0–1)0.1333, 0.0627, 0.051
RGB percentages13.3%, 6.3%, 5.1%
HSLhsl(8.6, 44.7%, 9.2%)
HSV / HSBhsv(8.6, 61.8%, 13.3%)
CMYK0%, 52.9%, 61.8%, 86.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,232,333
CSS custom property--colour: #22100D;

Brightness & contrast

Relative luminance0.0074WCAG 2.x, 0 is black and 1 is white
Perceived brightness22.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.29:1
Contrast with white18.29:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#141414
Inverted#DDEFF2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#14130Dno red cones; affects about 1% of men; ΔE 9.6 from the original
Deuteranopia#18160Dno green cones; the most common form, about 1% of men; ΔE 9.6 from the original
Tritanopia#260D0Fno blue cones; rare, and affects men and women equally; ΔE 4.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.29:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail

Named colours

Black · ΔE 11.9Dark slate grey · ΔE 33Dim grey · ΔE 39Gray · ΔE 47.9Slate grey · ΔE 49.8Saddle brown · ΔE 50.8
Nearest named CSS colourBlack (#000000)ΔE 11.94, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0D1F22
Analogous#220D15, #221A0D
Triadic#0D2210, #100D22
Split complementary#0D221A, #0D1522
Tetradic#15220D, #0D1F22, #1A0D22

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B65545
Lighter +30%#914437
Lighter +20%#6C3329
Lighter +10%#47211B
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#280C07
Less saturated −25%#1C1413

Channel breakdown

R34
G16
B13
Red34 (13.3%)
Green16 (6.3%)
Blue13 (5.1%)
Hue8.57°
Saturation (HSL)44.68%
Lightness9.22%
Dominant channelRed
Hex per channelR 22 · G 10 · B 0D

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Every value on this page was computed from “22100d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.