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Colour

#21187E

  • #21187E
  • Blue
  • Dark
  • Nearest: Midnight blue

#21187E is a blue with RGB values 33, 24, 126 and HSL 245°, 68%, 29%. It is a dark colour, so white text on it reaches 14:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#21187E#21187E
HEX#21187E
RGBrgb(33, 24, 126)
RGB (0–1)0.1294, 0.0941, 0.4941
RGB percentages12.9%, 9.4%, 49.4%
HSLhsl(245.3, 68%, 29.4%)
HSV / HSBhsv(245.3, 81%, 49.4%)
CMYK73.8%, 81%, 0%, 50.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,168,958
CSS custom property--colour: #21187E;

Brightness & contrast

Relative luminance0.02483WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.03:1
Contrast with white14.03:1WCAG normal text: AAA
Contrast with black1.5:1WCAG normal text: Fail
Greyscale equivalent#212121
Inverted#DEE781

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003081no red cones; affects about 1% of men; ΔE 18.6 from the original
Deuteranopia#00277Cno green cones; the most common form, about 1% of men; ΔE 13.4 from the original
Tritanopia#00374Bno blue cones; rare, and affects men and women equally; ΔE 60 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text14.03:1WCAG large text: AAA
Contrast with black, large text1.5:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 8.6Indigo · ΔE 14.2Navy · ΔE 14.3Rebecca purple · ΔE 17.8Dark blue · ΔE 18.6Dark slateblue · ΔE 22
Nearest named CSS colourMidnight blue (#191970)ΔE 8.65, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#757E18
Analogous#18427E, #54187E
Triadic#7E2118, #187E21
Split complementary#7E5418, #427E18
Tetradic#7E1842, #757E18, #187E54

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#857CE6
Lighter +30%#5E51DE
Lighter +20%#3728D4
Lighter +10%#2C20A9
Darker −10%#161053
Darker −20%#0B0828
Darker −30%#000000
Darker −40%#000000
More saturated +25%#120591
Less saturated −25%#302B6B

Channel breakdown

R33
G24
B126
Red33 (12.9%)
Green24 (9.4%)
Blue126 (49.4%)
Hue245.29°
Saturation (HSL)68%
Lightness29.41%
Dominant channelBlue
Hex per channelR 21 · G 18 · B 7E

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Every value on this page was computed from “21187e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.