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Recognised as Colour

#0A173B

  • #0A173B
  • Blue
  • Dark
  • Nearest: Black

#0A173B is a blue with RGB values 10, 23, 59 and HSL 224°, 71%, 14%. It is a dark colour, so white text on it reaches 17.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#0A173B#0A173B
HEX#0A173B
RGBrgb(10, 23, 59)
RGB (0–1)0.0392, 0.0902, 0.2314
RGB percentages3.9%, 9%, 23.1%
HSLhsl(224.1, 71%, 13.5%)
HSV / HSBhsv(224.1, 83.1%, 23.1%)
CMYK83.1%, 61%, 0%, 76.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer661,307
CSS custom property--colour: #0A173B;

Brightness & contrast

Relative luminance0.00993WCAG 2.x, 0 is black and 1 is white
Perceived brightness27.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.52:1
Contrast with white17.52:1WCAG normal text: AAA
Contrast with black1.2:1WCAG normal text: Fail
Greyscale equivalent#171717
Inverted#F5E8C4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#021C3Cno red cones; affects about 1% of men; ΔE 5.3 from the original
Deuteranopia#00173Ano green cones; the most common form, about 1% of men; ΔE 2.4 from the original
Tritanopia#002026no blue cones; rare, and affects men and women equally; ΔE 25.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.52:1WCAG large text: AAA
Contrast with black, large text1.2:1WCAG large text: Fail

Named colours

Black · ΔE 28.2Dark slateblue · ΔE 32.3Midnight blue · ΔE 33.8Dark slate grey · ΔE 37.5Dim grey · ΔE 44.4Steel blue · ΔE 46.2
Nearest named CSS colourBlack (#000000)ΔE 28.18, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3B2E0A
Analogous#0A303B, #150A3B
Triadic#3B0A17, #173B0A
Split complementary#3B150A, #303B0A
Tetradic#3B0A30, #3B2E0A, #0A3B15

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#3461DD
Lighter +30%#204ABE
Lighter +20%#193992
Lighter +10%#112867
Darker −10%#03060F
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#011344
Less saturated −25%#131B32

Channel breakdown

R10
G23
B59
Red10 (3.9%)
Green23 (9%)
Blue59 (23.1%)
Hue224.08°
Saturation (HSL)71.01%
Lightness13.53%
Dominant channelBlue
Hex per channelR 0A · G 17 · B 3B

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Every value on this page was computed from “0a173b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.