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Recognised as Colour

#231BB5

  • #231BB5
  • Blue
  • Dark
  • Nearest: Dark blue

#231BB5 is a blue with RGB values 35, 27, 181 and HSL 243°, 74%, 41%. It is a dark colour, so white text on it reaches 11.1:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#231BB5#231BB5
HEX#231BB5
RGBrgb(35, 27, 181)
RGB (0–1)0.1373, 0.1059, 0.7098
RGB percentages13.7%, 10.6%, 71%
HSLhsl(243.1, 74%, 40.8%)
HSV / HSBhsv(243.1, 85.1%, 71%)
CMYK80.7%, 85.1%, 0%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,300,853
CSS custom property--colour: #231BB5;

Brightness & contrast

Relative luminance0.04477WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.08:1
Contrast with white11.08:1WCAG normal text: AAA
Contrast with black1.9:1WCAG normal text: Fail
Greyscale equivalent#282828
Inverted#DCE44A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0043B9no red cones; affects about 1% of men; ΔE 26.4 from the original
Deuteranopia#0034B2no green cones; the most common form, about 1% of men; ΔE 17.8 from the original
Tritanopia#004E6Bno blue cones; rare, and affects men and women equally; ΔE 83.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.08:1WCAG large text: AAA
Contrast with black, large text1.9:1WCAG large text: Fail

Named colours

Dark blue · ΔE 13.7Navy · ΔE 18.4Medium blue · ΔE 19.7Blue violet · ΔE 23.4Indigo · ΔE 24.2Dark orchid · ΔE 27.2
Nearest named CSS colourDark blue (#00008B)ΔE 13.74, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#ADB51B
Analogous#1B60B5, #701BB5
Triadic#B5231B, #1BB523
Split complementary#B5701B, #60B51B
Tetradic#B51B60, #ADB51B, #1BB570

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ADAAF2
Lighter +30%#837DEC
Lighter +20%#5951E5
Lighter +10%#2E25DE
Darker −10%#1A1489
Darker −20%#120E5C
Darker −30%#090730
Darker −40%#010103
More saturated +25%#0C01CF
Less saturated −25%#3A359B

Channel breakdown

R35
G27
B181
Red35 (13.7%)
Green27 (10.6%)
Blue181 (71%)
Hue243.12°
Saturation (HSL)74.04%
Lightness40.78%
Dominant channelBlue
Hex per channelR 23 · G 1B · B B5

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Every value on this page was computed from “231bb5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.