Colour

#4057DD

#4057DD
Blue
Dark
Nearest: Medium slateblue

#4057DD is a blue with RGB values 64, 87, 221 and HSL 231°, 70%, 56%. It is a dark colour, so white text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#4057DD#4057DD

HEX#4057DD

RGBrgb(64, 87, 221)

RGB (0–1)0.251, 0.3412, 0.8667

RGB percentages25.1%, 34.1%, 86.7%

HSLhsl(231.2, 69.8%, 55.9%)

HSV / HSBhsv(231.2, 71%, 86.7%)

CMYK71%, 60.6%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,216,797

CSS custom property--colour: #4057DD;

Brightness & contrast

Relative luminance0.13127WCAG 2.x, 0 is black and 1 is white

Perceived brightness106 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.79:1

Contrast with white5.79:1WCAG normal text: AA

Contrast with black3.63:1WCAG normal text: Fail

Greyscale equivalent#5C5C5C

Inverted#BFA822

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#006DE1no red cones; affects about 1% of men; ΔE 18.2 from the original

Deuteranopia#005EDAno green cones; the most common form, about 1% of men; ΔE 10.1 from the original

Tritanopia#007992no blue cones; rare, and affects men and women equally; ΔE 74 from the original

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

Contrast with white, large text5.79:1WCAG large text: AAA

Contrast with black, large text3.63:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 11.9 Royal blue · ΔE 12.3 Slate blue · ΔE 13.4 Medium purple · ΔE 24.1 Rebecca purple · ΔE 26.7 Dark orchid · ΔE 31.1

Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 11.86, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#DDC640

Analogous#40A5DD, #7840DD

Triadic#DD4057, #57DD40

Split complementary#DD7840, #A5DD40

Tetradic#DD40A5, #DDC640, #40DD78

Tints, shades & saturation

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

Lighter +40%#EDEFFC

Lighter +30%#C2C9F4

Lighter +20%#97A3EC

Lighter +10%#6B7DE5

Darker −10%#233BC7

Darker −20%#1C2E9B

Darker −30%#142170

Darker −40%#0C1545

More saturated +25%#2443F9

Less saturated −25%#5C6BC1

Channel breakdown

R64

G87

B221

Red64 (25.1%)

Green87 (34.1%)

Blue221 (86.7%)

Hue231.21°

Saturation (HSL)69.78%

Lightness55.88%

Dominant channelBlue

Hex per channelR 40 · G 57 · B DD

Keep nerding

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#4057DD

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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