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Colour

#231D4E

  • #231D4E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#231D4E is a blue with RGB values 35, 29, 78 and HSL 247°, 46%, 21%. It is a dark colour, so white text on it reaches 15.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#231D4E#231D4E
HEX#231D4E
RGBrgb(35, 29, 78)
RGB (0–1)0.1373, 0.1137, 0.3059
RGB percentages13.7%, 11.4%, 30.6%
HSLhsl(247.3, 45.8%, 21%)
HSV / HSBhsv(247.3, 62.8%, 30.6%)
CMYK55.1%, 62.8%, 0%, 69.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,301,262
CSS custom property--colour: #231D4E;

Brightness & contrast

Relative luminance0.01786WCAG 2.x, 0 is black and 1 is white
Perceived brightness39.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.47:1
Contrast with white15.47:1WCAG normal text: AAA
Contrast with black1.36:1WCAG normal text: Fail
Greyscale equivalent#222222
Inverted#DCE2B1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002650no red cones; affects about 1% of men; ΔE 11.9 from the original
Deuteranopia#00234Dno green cones; the most common form, about 1% of men; ΔE 11 from the original
Tritanopia#132832no blue cones; rare, and affects men and women equally; ΔE 30.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.47:1WCAG large text: AAA
Contrast with black, large text1.36:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 22.3Midnight blue · ΔE 24.4Rebecca purple · ΔE 35.7Black · ΔE 37.4Indigo · ΔE 41.6Dark slate grey · ΔE 42.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 22.26, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#484E1D
Analogous#1D304E, #3B1D4E
Triadic#4E231D, #1D4E23
Split complementary#4E3B1D, #304E1D
Tetradic#4E1D30, #484E1D, #1D4E3B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#796EC9
Lighter +30%#5749BB
Lighter +20%#443998
Lighter +10%#342B73
Darker −10%#120F29
Darker −20%#020104
Darker −30%#000000
Darker −40%#000000
More saturated +25%#19105B
Less saturated −25%#2D2A41

Channel breakdown

R35
G29
B78
Red35 (13.7%)
Green29 (11.4%)
Blue78 (30.6%)
Hue247.35°
Saturation (HSL)45.79%
Lightness20.98%
Dominant channelBlue
Hex per channelR 23 · G 1D · B 4E

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Every value on this page was computed from “231d4e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.