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Recognised as Colour

#0A3FBF

  • #0A3FBF
  • Blue
  • Dark
  • Nearest: Slate blue

#0A3FBF is a blue with RGB values 10, 63, 191 and HSL 222°, 90%, 39%. It is a dark colour, so white text on it reaches 8.5:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#0A3FBF#0A3FBF
HEX#0A3FBF
RGBrgb(10, 63, 191)
RGB (0–1)0.0392, 0.2471, 0.749
RGB percentages3.9%, 24.7%, 74.9%
HSLhsl(222.4, 90%, 39.4%)
HSV / HSBhsv(222.4, 94.8%, 74.9%)
CMYK94.8%, 67%, 0%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer671,679
CSS custom property--colour: #0A3FBF;

Brightness & contrast

Relative luminance0.07381WCAG 2.x, 0 is black and 1 is white
Perceived brightness80.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.48:1
Contrast with white8.48:1WCAG normal text: AAA
Contrast with black2.48:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#F5C040

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0055C3no red cones; affects about 1% of men; ΔE 16.4 from the original
Deuteranopia#0045BDno green cones; the most common form, about 1% of men; ΔE 6 from the original
Tritanopia#006279no blue cones; rare, and affects men and women equally; ΔE 72.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.48:1WCAG large text: AAA
Contrast with black, large text2.48:1WCAG large text: Fail

Named colours

Slate blue · ΔE 18Royal blue · ΔE 18.9Medium slateblue · ΔE 20.8Dark blue · ΔE 23Navy · ΔE 23.5Rebecca purple · ΔE 24.3
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 17.98, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BF8A0A
Analogous#0A9ABF, #2F0ABF
Triadic#BF0A3F, #3FBF0A
Split complementary#BF300A, #9ABF0A
Tetradic#BF0A9A, #BF8A0A, #0ABF2F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9BB7FA
Lighter +30%#6B94F7
Lighter +20%#3A71F5
Lighter +10%#0D4FEF
Darker −10%#072F8F
Darker −20%#051F5E
Darker −30%#020F2E
Darker −40%#000000
More saturated +25%#003BC9
Less saturated −25%#2349A6

Channel breakdown

R10
G63
B191
Red10 (3.9%)
Green63 (24.7%)
Blue191 (74.9%)
Hue222.43°
Saturation (HSL)90.05%
Lightness39.41%
Dominant channelBlue
Hex per channelR 0A · G 3F · B BF

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Every value on this page was computed from “0a3fbf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.