Colour

#1800AB

#1800AB
Blue
Dark
Nearest: Dark blue

#1800AB is a blue with RGB values 24, 0, 171 and HSL 248°, 100%, 34%. It is a dark colour, so white text on it reaches 12.9:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#1800AB#1800AB

HEX#1800AB

RGBrgb(24, 0, 171)

RGB (0–1)0.0941, 0, 0.6706

RGB percentages9.4%, 0%, 67.1%

HSLhsl(248.4, 100%, 33.5%)

HSV / HSBhsv(248.4, 100%, 67.1%)

CMYK86%, 100%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,573,035

CSS custom property--colour: #1800AB;

Brightness & contrast

Relative luminance0.03134WCAG 2.x, 0 is black and 1 is white

Perceived brightness59.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 12.91:1

Contrast with white12.91:1WCAG normal text: AAA

Contrast with black1.63:1WCAG normal text: Fail

Greyscale equivalent#111111

Inverted#E7FF54

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0039AFno red cones; affects about 1% of men; ΔE 29.6 from the original

Deuteranopia#0029A9no green cones; the most common form, about 1% of men; ΔE 20 from the original

Tritanopia#004563no blue cones; rare, and affects men and women equally; ΔE 86.5 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text12.91:1WCAG large text: AAA

Contrast with black, large text1.63:1WCAG large text: Fail

Named colours

Dark blue · ΔE 14.3 Medium blue · ΔE 15.9 Navy · ΔE 19.6 Blue violet · ΔE 24.5 Indigo · ΔE 26.3 Dark violet · ΔE 27

Nearest named CSS colourDark blue (#00008B)ΔE 14.34, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#93AB00

Analogous#003DAB, #6E00AB

Triadic#AB1800, #00AB18

Split complementary#AB6E00, #3DAB00

Tetradic#AB003D, #93AB00, #00AB6D

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#8B78FF

Lighter +30%#5F45FF

Lighter +20%#3312FF

Lighter +10%#1F00DE

Darker −10%#110078

Darker −20%#0A0045

Darker −30%#030012

Darker −40%#000000

More saturated +25%#1800AB

Less saturated −25%#271596

Channel breakdown

R24

B171

Red24 (9.4%)

Green0 (0%)

Blue171 (67.1%)

Hue248.42°

Saturation (HSL)100%

Lightness33.53%

Dominant channelBlue

Hex per channelR 18 · G 00 · B AB

Keep nerding

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#1800AB

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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