Colour

#3751BA

#3751BA
Blue
Dark
Nearest: Royal blue

#3751BA is a blue with RGB values 55, 81, 186 and HSL 228°, 54%, 47%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#3751BA#3751BA

HEX#3751BA

RGBrgb(55, 81, 186)

RGB (0–1)0.2157, 0.3176, 0.7294

RGB percentages21.6%, 31.8%, 72.9%

HSLhsl(228.1, 54.4%, 47.3%)

HSV / HSBhsv(228.1, 70.4%, 72.9%)

CMYK70.4%, 56.5%, 0%, 27.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,625,402

CSS custom property--colour: #3751BA;

Brightness & contrast

Relative luminance0.10242WCAG 2.x, 0 is black and 1 is white

Perceived brightness93.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.89:1

Contrast with white6.89:1WCAG normal text: AA

Contrast with black3.05:1WCAG normal text: Fail

Greyscale equivalent#535353

Inverted#C8AE45

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0060BEno red cones; affects about 1% of men; ΔE 13.3 from the original

Deuteranopia#0054B8no green cones; the most common form, about 1% of men; ΔE 7.2 from the original

Tritanopia#006B7Dno blue cones; rare, and affects men and women equally; ΔE 61.1 from the original

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

Contrast with white, large text6.89:1WCAG large text: AAA

Contrast with black, large text3.05:1WCAG large text: AA

Named colours

Royal blue · ΔE 11.8 Slate blue · ΔE 12.2 Dark slateblue · ΔE 17.9 Rebecca purple · ΔE 20.8 Medium purple · ΔE 21.5 Medium slateblue · ΔE 21.6

Nearest named CSS colourRoyal blue (#4169E1)ΔE 11.8, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#BAA037

Analogous#3792BA, #5F37BA

Triadic#BA3751, #51BA37

Split complementary#BA5E37, #93BA37

Tetradic#BA3792, #BAA037, #37BA5E

Tints, shades & saturation

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

Lighter +40%#CDD4F0

Lighter +30%#A5B2E5

Lighter +20%#7E90D9

Lighter +10%#576ECD

Darker −10%#2B4093

Darker −20%#202F6B

Darker −30%#141E44

Darker −40%#080C1D

More saturated +25%#193FD8

Less saturated −25%#55639C

Channel breakdown

R55

G81

B186

Red55 (21.6%)

Green81 (31.8%)

Blue186 (72.9%)

Hue228.09°

Saturation (HSL)54.36%

Lightness47.25%

Dominant channelBlue

Hex per channelR 37 · G 51 · B BA

Keep nerding

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#3751BA

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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