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Colour

#21224E

  • #21224E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#21224E is a blue with RGB values 33, 34, 78 and HSL 239°, 41%, 22%. It is a dark colour, so white text on it reaches 15:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#21224E#21224E
HEX#21224E
RGBrgb(33, 34, 78)
RGB (0–1)0.1294, 0.1333, 0.3059
RGB percentages12.9%, 13.3%, 30.6%
HSLhsl(238.7, 40.5%, 21.8%)
HSV / HSBhsv(238.7, 57.7%, 30.6%)
CMYK57.7%, 56.4%, 0%, 69.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,171,470
CSS custom property--colour: #21224E;

Brightness & contrast

Relative luminance0.02017WCAG 2.x, 0 is black and 1 is white
Perceived brightness41.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.96:1
Contrast with white14.96:1WCAG normal text: AAA
Contrast with black1.4:1WCAG normal text: Fail
Greyscale equivalent#252525
Inverted#DEDDB1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0C2950no red cones; affects about 1% of men; ΔE 8.6 from the original
Deuteranopia#07254Dno green cones; the most common form, about 1% of men; ΔE 7.5 from the original
Tritanopia#0E2C34no blue cones; rare, and affects men and women equally; ΔE 29.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.96:1WCAG large text: AAA
Contrast with black, large text1.4:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 24.3Midnight blue · ΔE 28.4Black · ΔE 34.5Dark slate grey · ΔE 38.3Rebecca purple · ΔE 39Steel blue · ΔE 41.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 24.34, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4E4D21
Analogous#21384E, #37214E
Triadic#4E2122, #224E21
Split complementary#4E3721, #384E21
Tetradic#4E2138, #4E4D21, #214E37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7678C5
Lighter +30%#5254B6
Lighter +20%#3F4196
Lighter +10%#303272
Darker −10%#12122A
Darker −20%#030306
Darker −30%#000000
Darker −40%#000000
More saturated +25%#13155C
Less saturated −25%#2F2F40

Channel breakdown

R33
G34
B78
Red33 (12.9%)
Green34 (13.3%)
Blue78 (30.6%)
Hue238.67°
Saturation (HSL)40.54%
Lightness21.76%
Dominant channelBlue
Hex per channelR 21 · G 22 · B 4E

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Every value on this page was computed from “21224e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.