Colour

#283A59

#283A59
Blue
Dark
Nearest: Dark slate grey

#283A59 is a blue with RGB values 40, 58, 89 and HSL 218°, 38%, 25%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#283A59#283A59

HEX#283A59

RGBrgb(40, 58, 89)

RGB (0–1)0.1569, 0.2275, 0.349

RGB percentages15.7%, 22.7%, 34.9%

HSLhsl(218, 38%, 25.3%)

HSV / HSBhsv(218, 55.1%, 34.9%)

CMYK55.1%, 34.8%, 0%, 65.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,636,377

CSS custom property--colour: #283A59;

Brightness & contrast

Relative luminance0.04198WCAG 2.x, 0 is black and 1 is white

Perceived brightness57.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.41:1

Contrast with white11.41:1WCAG normal text: AAA

Contrast with black1.84:1WCAG normal text: Fail

Greyscale equivalent#383838

Inverted#D7C5A6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2E3C5Ano red cones; affects about 1% of men; ΔE 1.7 from the original

Deuteranopia#283858no green cones; the most common form, about 1% of men; ΔE 1.3 from the original

Tritanopia#114145no blue cones; rare, and affects men and women equally; ΔE 21.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text11.41:1WCAG large text: AAA

Contrast with black, large text1.84:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 23.5 Dim grey · ΔE 29.1 Slate grey · ΔE 30.7 Steel blue · ΔE 31.1 Dark slateblue · ΔE 32.1 Black · ΔE 32.2

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 23.53, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#594728

Analogous#285259, #2F2859

Triadic#59283A, #3A5928

Split complementary#592F28, #525928

Tetradic#592852, #594728, #28592F

Tints, shades & saturation

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

Lighter +40%#859EC8

Lighter +30%#6282B8

Lighter +20%#48689F

Lighter +10%#38517C

Darker −10%#182336

Darker −20%#080C13

Darker −30%#000000

Darker −40%#000000

More saturated +25%#183669

Less saturated −25%#383E49

Channel breakdown

R40

G58

B89

Red40 (15.7%)

Green58 (22.7%)

Blue89 (34.9%)

Hue217.96°

Saturation (HSL)37.98%

Lightness25.29%

Dominant channelBlue

Hex per channelR 28 · G 3A · B 59

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#283A59

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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