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Recognised as Colour

#0A318F

  • #0A318F
  • Blue
  • Dark
  • Nearest: Midnight blue

#0A318F is a blue with RGB values 10, 49, 143 and HSL 222°, 87%, 30%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#0A318F#0A318F
HEX#0A318F
RGBrgb(10, 49, 143)
RGB (0–1)0.0392, 0.1922, 0.5608
RGB percentages3.9%, 19.2%, 56.1%
HSLhsl(222.4, 86.9%, 30%)
HSV / HSBhsv(222.4, 93%, 56.1%)
CMYK93%, 65.7%, 0%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer668,047
CSS custom property--colour: #0A318F;

Brightness & contrast

Relative luminance0.04244WCAG 2.x, 0 is black and 1 is white
Perceived brightness61.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.36:1
Contrast with white11.36:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#F5CE70

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004092no red cones; affects about 1% of men; ΔE 11.8 from the original
Deuteranopia#00348Dno green cones; the most common form, about 1% of men; ΔE 3.9 from the original
Tritanopia#004A5Bno blue cones; rare, and affects men and women equally; ΔE 56.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.36:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 11.4Dark slateblue · ΔE 14.5Rebecca purple · ΔE 19.9Slate blue · ΔE 23Indigo · ΔE 25.4Royal blue · ΔE 25.5
Nearest named CSS colourMidnight blue (#191970)ΔE 11.39, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8F680A
Analogous#0A748F, #260A8F
Triadic#8F0A31, #318F0A
Split complementary#8F260A, #738F0A
Tetradic#8F0A73, #8F680A, #0A8F25

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7097F5
Lighter +30%#4074F2
Lighter +20%#1152EE
Lighter +10%#0D41BF
Darker −10%#07215F
Darker −20%#031030
Darker −30%#000000
Darker −40%#000000
More saturated +25%#002D99
Less saturated −25%#1D397C

Channel breakdown

R10
G49
B143
Red10 (3.9%)
Green49 (19.2%)
Blue143 (56.1%)
Hue222.41°
Saturation (HSL)86.93%
Lightness30%
Dominant channelBlue
Hex per channelR 0A · G 31 · B 8F

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Every value on this page was computed from “0a318f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.