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Recognised as Colour

#331DA0

  • #331DA0
  • Blue
  • Dark
  • Nearest: Dark blue

#331DA0 is a blue with RGB values 51, 29, 160 and HSL 250°, 69%, 37%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#331DA0#331DA0
HEX#331DA0
RGBrgb(51, 29, 160)
RGB (0–1)0.2, 0.1137, 0.6275
RGB percentages20%, 11.4%, 62.7%
HSLhsl(250.1, 69.3%, 37.1%)
HSV / HSBhsv(250.1, 81.9%, 62.7%)
CMYK68.1%, 81.9%, 0%, 37.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,349,920
CSS custom property--colour: #331DA0;

Brightness & contrast

Relative luminance0.04121WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.51:1
Contrast with white11.51:1WCAG normal text: AAA
Contrast with black1.82:1WCAG normal text: Fail
Greyscale equivalent#2B2B2B
Inverted#CCE25F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003EA4no red cones; affects about 1% of men; ΔE 23.7 from the original
Deuteranopia#00349Eno green cones; the most common form, about 1% of men; ΔE 18.5 from the original
Tritanopia#00465Fno blue cones; rare, and affects men and women equally; ΔE 73.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.51:1WCAG large text: AAA
Contrast with black, large text1.82:1WCAG large text: Fail

Named colours

Dark blue · ΔE 10Navy · ΔE 11.2Indigo · ΔE 13.8Rebecca purple · ΔE 21.5Midnight blue · ΔE 24.5Slate blue · ΔE 25.7
Nearest named CSS colourDark blue (#00008B)ΔE 10.02, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8AA01D
Analogous#1D49A0, #741DA0
Triadic#A0331D, #1DA033
Split complementary#A0741D, #49A01D
Tetradic#A01D49, #8AA01D, #1DA074

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AA9CED
Lighter +30%#8471E5
Lighter +20%#5F46DD
Lighter +10%#4125CB
Darker −10%#251575
Darker −20%#170D4A
Darker −30%#0A061E
Darker −40%#000000
More saturated +25%#2305B8
Less saturated −25%#433588

Channel breakdown

R51
G29
B160
Red51 (20%)
Green29 (11.4%)
Blue160 (62.7%)
Hue250.08°
Saturation (HSL)69.31%
Lightness37.06%
Dominant channelBlue
Hex per channelR 33 · G 1D · B A0

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Every value on this page was computed from “331da0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.