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Recognised as Colour

#33010B

  • #33010B
  • Red
  • Dark
  • Nearest: Black

#33010B is a red with RGB values 51, 1, 11 and HSL 348°, 96%, 10%. 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

#33010B#33010B
HEX#33010B
RGBrgb(51, 1, 11)
RGB (0–1)0.2, 0.0039, 0.0431
RGB percentages20%, 0.4%, 4.3%
HSLhsl(348, 96.2%, 10.2%)
HSV / HSBhsv(348, 98%, 20%)
CMYK0%, 98%, 78.4%, 80%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,342,603
CSS custom property--colour: #33010B;

Brightness & contrast

Relative luminance0.0075WCAG 2.x, 0 is black and 1 is white
Perceived brightness28.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.26:1
Contrast with white18.26:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#0C0C0C
Inverted#CCFEF4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0F0E0Bno red cones; affects about 1% of men; ΔE 26.2 from the original
Deuteranopia#1C1909no green cones; the most common form, about 1% of men; ΔE 27.2 from the original
Tritanopia#390005no blue cones; rare, and affects men and women equally; ΔE 5.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.26:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail

Named colours

Black · ΔE 27.1Maroon · ΔE 43.3Dark slate grey · ΔE 45.6Dim grey · ΔE 45.9Brown · ΔE 46.1Saddle brown · ΔE 46.4
Nearest named CSS colourBlack (#000000)ΔE 27.06, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#013329
Analogous#330124, #331001
Triadic#0B3301, #010B33
Split complementary#013310, #012433
Tetradic#243301, #013329, #100133

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FA0637
Lighter +30%#C9042B
Lighter +20%#970321
Lighter +10%#650216
Darker −10%#010000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#34000A
Less saturated −25%#2D070F

Channel breakdown

R51
G1
B11
Red51 (20%)
Green1 (0.4%)
Blue11 (4.3%)
Hue348°
Saturation (HSL)96.15%
Lightness10.2%
Dominant channelRed
Hex per channelR 33 · G 01 · B 0B

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Every value on this page was computed from “33010b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.