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Recognised as Colour

#310B07

  • #310B07
  • Red
  • Dark
  • Nearest: Black

#310B07 is a red with RGB values 49, 11, 7 and HSL 6°, 75%, 11%. It is a dark colour, so white text on it reaches 17.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#310B07#310B07
HEX#310B07
RGBrgb(49, 11, 7)
RGB (0–1)0.1922, 0.0431, 0.0275
RGB percentages19.2%, 4.3%, 2.7%
HSLhsl(5.7, 75%, 11%)
HSV / HSBhsv(5.7, 85.7%, 19.2%)
CMYK0%, 77.6%, 85.7%, 80.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,214,087
CSS custom property--colour: #310B07;

Brightness & contrast

Relative luminance0.00908WCAG 2.x, 0 is black and 1 is white
Perceived brightness28.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.77:1
Contrast with white17.77:1WCAG normal text: AAA
Contrast with black1.18:1WCAG normal text: Fail
Greyscale equivalent#131313
Inverted#CEF4F8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#161306no red cones; affects about 1% of men; ΔE 20.3 from the original
Deuteranopia#1F1B06no green cones; the most common form, about 1% of men; ΔE 20.8 from the original
Tritanopia#37030Ano blue cones; rare, and affects men and women equally; ΔE 6.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.77:1WCAG large text: AAA
Contrast with black, large text1.18:1WCAG large text: Fail

Named colours

Black · ΔE 22.9Dark slate grey · ΔE 40.7Dim grey · ΔE 42.1Saddle brown · ΔE 43.4Maroon · ΔE 44.1Sienna · ΔE 45.2
Nearest named CSS colourBlack (#000000)ΔE 22.89, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#072D31
Analogous#310718, #312007
Triadic#07310B, #0B0731
Split complementary#073120, #071831
Tetradic#183107, #072D31, #200731

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E03624
Lighter +30%#B7291A
Lighter +20%#8A1F14
Lighter +10%#5E150D
Darker −10%#040101
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#380500
Less saturated −25%#2A110E

Channel breakdown

R49
G11
B7
Red49 (19.2%)
Green11 (4.3%)
Blue7 (2.7%)
Hue5.71°
Saturation (HSL)75%
Lightness10.98%
Dominant channelRed
Hex per channelR 31 · G 0B · B 07

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Every value on this page was computed from “310b07” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.