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Recognised as Colour

#21129D

  • #21129D
  • Blue
  • Dark
  • Nearest: Dark blue

#21129D is a blue with RGB values 33, 18, 157 and HSL 246°, 79%, 34%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#21129D#21129D
HEX#21129D
RGBrgb(33, 18, 157)
RGB (0–1)0.1294, 0.0706, 0.6157
RGB percentages12.9%, 7.1%, 61.6%
HSLhsl(246.5, 79.4%, 34.3%)
HSV / HSBhsv(246.5, 88.5%, 61.6%)
CMYK79%, 88.5%, 0%, 38.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,167,453
CSS custom property--colour: #21129D;

Brightness & contrast

Relative luminance0.0319WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.82:1
Contrast with white12.82:1WCAG normal text: AAA
Contrast with black1.64:1WCAG normal text: Fail
Greyscale equivalent#1F1F1F
Inverted#DEED62

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0038A1no red cones; affects about 1% of men; ΔE 24.5 from the original
Deuteranopia#002B9Bno green cones; the most common form, about 1% of men; ΔE 16.9 from the original
Tritanopia#00425Cno blue cones; rare, and affects men and women equally; ΔE 76.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.82:1WCAG large text: AAA
Contrast with black, large text1.64:1WCAG large text: Fail

Named colours

Dark blue · ΔE 6.1Navy · ΔE 9.7Indigo · ΔE 16.5Rebecca purple · ΔE 26.7Midnight blue · ΔE 27.9Medium blue · ΔE 27.9
Nearest named CSS colourDark blue (#00008B)ΔE 6.13, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8E9D12
Analogous#12489D, #67129D
Triadic#9D2112, #129D21
Split complementary#9D6712, #489D12
Tetradic#9D1248, #8E9D12, #129D67

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9589F2
Lighter +30%#6B5CEC
Lighter +20%#422EE7
Lighter +10%#2B17CB
Darker −10%#170D6F
Darker −20%#0E0841
Darker −30%#040214
Darker −40%#000000
More saturated +25%#1300AF
Less saturated −25%#322887

Channel breakdown

R33
G18
B157
Red33 (12.9%)
Green18 (7.1%)
Blue157 (61.6%)
Hue246.47°
Saturation (HSL)79.43%
Lightness34.31%
Dominant channelBlue
Hex per channelR 21 · G 12 · B 9D

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Every value on this page was computed from “21129d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.