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Recognised as Colour

#0A17CB

  • #0A17CB
  • Blue
  • Dark
  • Nearest: Medium blue

#0A17CB is a blue with RGB values 10, 23, 203 and HSL 236°, 91%, 42%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#0A17CB#0A17CB
HEX#0A17CB
RGBrgb(10, 23, 203)
RGB (0–1)0.0392, 0.0902, 0.7961
RGB percentages3.9%, 9%, 79.6%
HSLhsl(236, 90.6%, 41.8%)
HSV / HSBhsv(236, 95.1%, 79.6%)
CMYK95.1%, 88.7%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer661,451
CSS custom property--colour: #0A17CB;

Brightness & contrast

Relative luminance0.04989WCAG 2.x, 0 is black and 1 is white
Perceived brightness71 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.51:1
Contrast with white10.51:1WCAG normal text: AAA
Contrast with black2:1WCAG normal text: Fail
Greyscale equivalent#212121
Inverted#F5E834

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0049D0no red cones; affects about 1% of men; ΔE 30.3 from the original
Deuteranopia#0034C8no green cones; the most common form, about 1% of men; ΔE 18 from the original
Tritanopia#005778no blue cones; rare, and affects men and women equally; ΔE 94.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.51:1WCAG large text: AAA
Contrast with black, large text2:1WCAG large text: Fail

Named colours

Medium blue · ΔE 7.5Blue violet · ΔE 21.8Dark blue · ΔE 24.7Dark violet · ΔE 26.2Blue · ΔE 27.8Navy · ΔE 29.9
Nearest named CSS colourMedium blue (#0000CD)ΔE 7.48, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CBBE0A
Analogous#0A77CB, #5E0ACB
Triadic#CB0A17, #17CB0A
Split complementary#CB5E0A, #77CB0A
Tetradic#CB0A77, #CBBE0A, #0ACB5E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6ACFB
Lighter +30%#767FF8
Lighter +20%#4551F6
Lighter +10%#1524F3
Darker −10%#08119A
Darker −20%#050C6A
Darker −30%#030639
Darker −40%#000109
More saturated +25%#000ED5
Less saturated −25%#252EB0

Channel breakdown

R10
G23
B203
Red10 (3.9%)
Green23 (9%)
Blue203 (79.6%)
Hue235.96°
Saturation (HSL)90.61%
Lightness41.76%
Dominant channelBlue
Hex per channelR 0A · G 17 · B CB

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Every value on this page was computed from “0a17cb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.