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Recognised as Colour

#21233D

  • #21233D
  • Blue
  • Dark
  • Nearest: Black

#21233D is a blue with RGB values 33, 35, 61 and HSL 236°, 30%, 18%. It is a dark colour, so white text on it reaches 15.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#21233D#21233D
HEX#21233D
RGBrgb(33, 35, 61)
RGB (0–1)0.1294, 0.1373, 0.2392
RGB percentages12.9%, 13.7%, 23.9%
HSLhsl(235.7, 29.8%, 18.4%)
HSV / HSBhsv(235.7, 45.9%, 23.9%)
CMYK45.9%, 42.6%, 0%, 76.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,171,709
CSS custom property--colour: #21233D;

Brightness & contrast

Relative luminance0.01862WCAG 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 15.3:1
Contrast with white15.3:1WCAG normal text: AAA
Contrast with black1.37:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#DEDCC2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1A263Eno red cones; affects about 1% of men; ΔE 4 from the original
Deuteranopia#18243Cno green cones; the most common form, about 1% of men; ΔE 3.9 from the original
Tritanopia#19282Dno blue cones; rare, and affects men and women equally; ΔE 16.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.3:1WCAG large text: AAA
Contrast with black, large text1.37:1WCAG large text: Fail

Named colours

Black · ΔE 23.6Dark slate grey · ΔE 28.3Dim grey · ΔE 34.9Dark slateblue · ΔE 35.3Slate grey · ΔE 39.7Midnight blue · ΔE 40.9
Nearest named CSS colourBlack (#000000)ΔE 23.58, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3D3B21
Analogous#21313D, #2D213D
Triadic#3D2123, #233D21
Split complementary#3D2D21, #313D21
Tetradic#3D2131, #3D3B21, #213D2D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#757AB5
Lighter +30%#575CA0
Lighter +20%#45497F
Lighter +10%#33365E
Darker −10%#0F101C
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#151949
Less saturated −25%#2D2D31

Channel breakdown

R33
G35
B61
Red33 (12.9%)
Green35 (13.7%)
Blue61 (23.9%)
Hue235.71°
Saturation (HSL)29.79%
Lightness18.43%
Dominant channelBlue
Hex per channelR 21 · G 23 · B 3D

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Every value on this page was computed from “21233d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.