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Recognised as Colour

#3A1A18

  • #3A1A18
  • Red
  • Dark
  • Nearest: Black

#3A1A18 is a red with RGB values 58, 26, 24 and HSL 4°, 41%, 16%. It is a dark colour, so white text on it reaches 15.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#3A1A18#3A1A18
HEX#3A1A18
RGBrgb(58, 26, 24)
RGB (0–1)0.2275, 0.102, 0.0941
RGB percentages22.7%, 10.2%, 9.4%
HSLhsl(3.5, 41.5%, 16.1%)
HSV / HSBhsv(3.5, 58.6%, 22.7%)
CMYK0%, 55.2%, 58.6%, 77.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,807,768
CSS custom property--colour: #3A1A18;

Brightness & contrast

Relative luminance0.01704WCAG 2.x, 0 is black and 1 is white
Perceived brightness38.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.66:1
Contrast with white15.66:1WCAG normal text: AAA
Contrast with black1.34:1WCAG normal text: Fail
Greyscale equivalent#212121
Inverted#C5E5E7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#211F18no red cones; affects about 1% of men; ΔE 16.6 from the original
Deuteranopia#292617no green cones; the most common form, about 1% of men; ΔE 17.2 from the original
Tritanopia#40151Ano blue cones; rare, and affects men and women equally; ΔE 6.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.66:1WCAG large text: AAA
Contrast with black, large text1.34:1WCAG large text: Fail

Named colours

Black · ΔE 22.5Dark slate grey · ΔE 34.6Dim grey · ΔE 35.3Saddle brown · ΔE 41.6Sienna · ΔE 42.6Gray · ΔE 43.5
Nearest named CSS colourBlack (#000000)ΔE 22.5, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#18383A
Analogous#3A1827, #3A2B18
Triadic#183A1A, #1A183A
Split complementary#183A2B, #18273A
Tetradic#273A18, #18383A, #2B183A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BD6661
Lighter +30%#A64B45
Lighter +20%#823A36
Lighter +10%#5E2A27
Darker −10%#160A09
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#44110E
Less saturated −25%#302322

Channel breakdown

R58
G26
B24
Red58 (22.7%)
Green26 (10.2%)
Blue24 (9.4%)
Hue3.53°
Saturation (HSL)41.46%
Lightness16.08%
Dominant channelRed
Hex per channelR 3A · G 1A · B 18

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Every value on this page was computed from “3a1a18” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.