Colour

#18304A

#18304A
Blue
Dark
Nearest: Dark slate grey

#18304A is a blue with RGB values 24, 48, 74 and HSL 211°, 51%, 19%. It is a dark colour, so white text on it reaches 13.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#18304A#18304A

HEX#18304A

RGBrgb(24, 48, 74)

RGB (0–1)0.0941, 0.1882, 0.2902

RGB percentages9.4%, 18.8%, 29%

HSLhsl(211.2, 51%, 19.2%)

HSV / HSBhsv(211.2, 67.6%, 29%)

CMYK67.6%, 35.1%, 0%, 71%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,585,226

CSS custom property--colour: #18304A;

Brightness & contrast

Relative luminance0.02803WCAG 2.x, 0 is black and 1 is white

Perceived brightness46.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 13.46:1

Contrast with white13.46:1WCAG normal text: AAA

Contrast with black1.56:1WCAG normal text: Fail

Greyscale equivalent#2D2D2D

Inverted#E7CFB5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#25314Bno red cones; affects about 1% of men; ΔE 3.6 from the original

Deuteranopia#1E2C49no green cones; the most common form, about 1% of men; ΔE 4.2 from the original

Tritanopia#003639no blue cones; rare, and affects men and women equally; ΔE 19.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text13.46:1WCAG large text: AAA

Contrast with black, large text1.56:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 22.7 Black · ΔE 27 Dim grey · ΔE 31.5 Slate grey · ΔE 34.7 Steel blue · ΔE 36 Dark slateblue · ΔE 36.7

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 22.69, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#4A3218

Analogous#18494A, #19184A

Triadic#4A1830, #304A18

Split complementary#4A1918, #494A18

Tetradic#4A1849, #4A3218, #184A19

Tints, shades & saturation

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

Lighter +40%#6295CC

Lighter +30%#3D7BBE

Lighter +20%#316297

Lighter +10%#244971

Darker −10%#0C1723

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0C3056

Less saturated −25%#24303E

Channel breakdown

R24

G48

B74

Red24 (9.4%)

Green48 (18.8%)

Blue74 (29%)

Hue211.2°

Saturation (HSL)51.02%

Lightness19.22%

Dominant channelBlue

Hex per channelR 18 · G 30 · B 4A

Keep nerding

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#18304A

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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