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Colour

#031A99

  • #031A99
  • Blue
  • Dark
  • Nearest: Dark blue

#031A99 is a blue with RGB values 3, 26, 153 and HSL 231°, 96%, 31%. It is a dark colour, so white text on it reaches 13:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#031A99#031A99
HEX#031A99
RGBrgb(3, 26, 153)
RGB (0–1)0.0118, 0.102, 0.6
RGB percentages1.2%, 10.2%, 60%
HSLhsl(230.8, 96.2%, 30.6%)
HSV / HSBhsv(230.8, 98%, 60%)
CMYK98%, 83%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer203,417
CSS custom property--colour: #031A99;

Brightness & contrast

Relative luminance0.03058WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.03:1
Contrast with white13.03:1WCAG normal text: AAA
Contrast with black1.61:1WCAG normal text: Fail
Greyscale equivalent#1E1E1E
Inverted#FCE566

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00389Cno red cones; affects about 1% of men; ΔE 21.5 from the original
Deuteranopia#002997no green cones; the most common form, about 1% of men; ΔE 11.6 from the original
Tritanopia#00435Bno blue cones; rare, and affects men and women equally; ΔE 72.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.03:1WCAG large text: AAA
Contrast with black, large text1.61:1WCAG large text: Fail

Named colours

Dark blue · ΔE 8.2Navy · ΔE 8.6Indigo · ΔE 16.5Midnight blue · ΔE 23Rebecca purple · ΔE 24.6Slate blue · ΔE 28.4
Nearest named CSS colourDark blue (#00008B)ΔE 8.16, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#998203
Analogous#036599, #370399
Triadic#99031A, #1A9903
Split complementary#993703, #659903
Tetradic#990365, #998203, #039937

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6C82FC
Lighter +30%#3A58FB
Lighter +20%#082DFA
Lighter +10%#0423CB
Darker −10%#021267
Darker −20%#010935
Darker −30%#000103
Darker −40%#000000
More saturated +25%#00189C
Less saturated −25%#162885

Channel breakdown

R3
G26
B153
Red3 (1.2%)
Green26 (10.2%)
Blue153 (60%)
Hue230.8°
Saturation (HSL)96.15%
Lightness30.59%
Dominant channelBlue
Hex per channelR 03 · G 1A · B 99

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Every value on this page was computed from “031a99” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.