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Recognised as Colour

#18203D

  • #18203D
  • Blue
  • Dark
  • Nearest: Black

#18203D is a blue with RGB values 24, 32, 61 and HSL 227°, 44%, 17%. It is a dark colour, so white text on it reaches 16:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#18203D#18203D
HEX#18203D
RGBrgb(24, 32, 61)
RGB (0–1)0.0941, 0.1255, 0.2392
RGB percentages9.4%, 12.5%, 23.9%
HSLhsl(227, 43.5%, 16.7%)
HSV / HSBhsv(227, 60.7%, 23.9%)
CMYK60.7%, 47.5%, 0%, 76.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,581,117
CSS custom property--colour: #18203D;

Brightness & contrast

Relative luminance0.01564WCAG 2.x, 0 is black and 1 is white
Perceived brightness34.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16:1
Contrast with white16:1WCAG normal text: AAA
Contrast with black1.31:1WCAG normal text: Fail
Greyscale equivalent#202020
Inverted#E7DFC2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#14233Eno red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#10203Cno green cones; the most common form, about 1% of men; ΔE 2.5 from the original
Tritanopia#07262Bno blue cones; rare, and affects men and women equally; ΔE 20.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16:1WCAG large text: AAA
Contrast with black, large text1.31:1WCAG large text: Fail

Named colours

Black · ΔE 24.6Dark slate grey · ΔE 30.4Dark slateblue · ΔE 34.5Dim grey · ΔE 37.7Midnight blue · ΔE 39.1Slate grey · ΔE 41.8
Nearest named CSS colourBlack (#000000)ΔE 24.57, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3D3518
Analogous#18323D, #23183D
Triadic#3D1820, #203D18
Split complementary#3D2318, #333D18
Tetradic#3D1832, #3D3518, #183D23

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6075C1
Lighter +30%#435AAB
Lighter +20%#354686
Lighter +10%#263362
Darker −10%#0A0D18
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0D1A48
Less saturated −25%#232632

Channel breakdown

R24
G32
B61
Red24 (9.4%)
Green32 (12.5%)
Blue61 (23.9%)
Hue227.03°
Saturation (HSL)43.53%
Lightness16.67%
Dominant channelBlue
Hex per channelR 18 · G 20 · B 3D

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Every value on this page was computed from “18203d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.