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Recognised as Colour

#0A183E

  • #0A183E
  • Blue
  • Dark
  • Nearest: Black

#0A183E is a blue with RGB values 10, 24, 62 and HSL 224°, 72%, 14%. It is a dark colour, so white text on it reaches 17.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#0A183E#0A183E
HEX#0A183E
RGBrgb(10, 24, 62)
RGB (0–1)0.0392, 0.0941, 0.2431
RGB percentages3.9%, 9.4%, 24.3%
HSLhsl(223.8, 72.2%, 14.1%)
HSV / HSBhsv(223.8, 83.9%, 24.3%)
CMYK83.9%, 61.3%, 0%, 75.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer661,566
CSS custom property--colour: #0A183E;

Brightness & contrast

Relative luminance0.01066WCAG 2.x, 0 is black and 1 is white
Perceived brightness28.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.31:1
Contrast with white17.31:1WCAG normal text: AAA
Contrast with black1.21:1WCAG normal text: Fail
Greyscale equivalent#181818
Inverted#F5E7C1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#011D3Fno red cones; affects about 1% of men; ΔE 5.4 from the original
Deuteranopia#00183Dno green cones; the most common form, about 1% of men; ΔE 2.3 from the original
Tritanopia#002128no blue cones; rare, and affects men and women equally; ΔE 26.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.31:1WCAG large text: AAA
Contrast with black, large text1.21:1WCAG large text: Fail

Named colours

Black · ΔE 29.6Dark slateblue · ΔE 31Midnight blue · ΔE 32.5Dark slate grey · ΔE 38.1Dim grey · ΔE 44.8Rebecca purple · ΔE 45.4
Nearest named CSS colourBlack (#000000)ΔE 29.6, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3E300A
Analogous#0A323E, #160A3E
Triadic#3E0A18, #183E0A
Split complementary#3E160A, #323E0A
Tetradic#3E0A32, #3E300A, #0A3E16

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#3563DF
Lighter +30%#1F4BC2
Lighter +20%#183A96
Lighter +10%#11296A
Darker −10%#030712
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#011447
Less saturated −25%#131C35

Channel breakdown

R10
G24
B62
Red10 (3.9%)
Green24 (9.4%)
Blue62 (24.3%)
Hue223.85°
Saturation (HSL)72.22%
Lightness14.12%
Dominant channelBlue
Hex per channelR 0A · G 18 · B 3E

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Every value on this page was computed from “0a183e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.