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Recognised as Colour

#1F090A

  • #1F090A
  • Red
  • Dark
  • Nearest: Black

#1F090A is a red with RGB values 31, 9, 10 and HSL 357°, 55%, 8%. It is a dark colour, so white text on it reaches 19.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1F090A#1F090A
HEX#1F090A
RGBrgb(31, 9, 10)
RGB (0–1)0.1216, 0.0353, 0.0392
RGB percentages12.2%, 3.5%, 3.9%
HSLhsl(357.3, 55%, 7.8%)
HSV / HSBhsv(357.3, 71%, 12.2%)
CMYK0%, 71%, 67.7%, 87.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,033,930
CSS custom property--colour: #1F090A;

Brightness & contrast

Relative luminance0.00509WCAG 2.x, 0 is black and 1 is white
Perceived brightness18.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.06:1
Contrast with white19.06:1WCAG normal text: AAA
Contrast with black1.1:1WCAG normal text: Fail
Greyscale equivalent#0E0E0E
Inverted#E0F6F5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0E0D0Ano red cones; affects about 1% of men; ΔE 9.9 from the original
Deuteranopia#13110Ano green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#230609no blue cones; rare, and affects men and women equally; ΔE 3.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.06:1WCAG large text: AAA
Contrast with black, large text1.1:1WCAG large text: Fail

Named colours

Black · ΔE 11Dark slate grey · ΔE 34.8Dim grey · ΔE 41.1Gray · ΔE 50Slate grey · ΔE 51.5Saddle brown · ΔE 53
Nearest named CSS colourBlack (#000000)ΔE 11.04, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#091F1E
Analogous#1F0915, #1F1309
Triadic#0A1F09, #090A1F
Split complementary#091F13, #09151F
Tetradic#151F09, #091F1E, #13091F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BD373D
Lighter +30%#962B30
Lighter +20%#6E2024
Lighter +10%#471417
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#240405
Less saturated −25%#1A0E0F

Channel breakdown

R31
G9
B10
Red31 (12.2%)
Green9 (3.5%)
Blue10 (3.9%)
Hue357.27°
Saturation (HSL)55%
Lightness7.84%
Dominant channelRed
Hex per channelR 1F · G 09 · B 0A

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Every value on this page was computed from “1f090a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.