Colour

#0057DB

#0057DB
Blue
Dark
Nearest: Royal blue

#0057DB is a blue with RGB values 0, 87, 219 and HSL 216°, 100%, 43%. It is a dark colour, so white text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#0057DB#0057DB

HEX#0057DB

RGBrgb(0, 87, 219)

RGB (0–1)0, 0.3412, 0.8588

RGB percentages0%, 34.1%, 85.9%

HSLhsl(216.2, 100%, 42.9%)

HSV / HSBhsv(216.2, 100%, 85.9%)

CMYK100%, 60.3%, 0%, 14.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer22,491

CSS custom property--colour: #0057DB;

Brightness & contrast

Relative luminance0.11931WCAG 2.x, 0 is black and 1 is white

Perceived brightness99.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.2:1

Contrast with white6.2:1WCAG normal text: AA

Contrast with black3.39:1WCAG normal text: Fail

Greyscale equivalent#4E4E4E

Inverted#FFA824

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#006ADFno red cones; affects about 1% of men; ΔE 13.7 from the original

Deuteranopia#0058D9no green cones; the most common form, about 1% of men; ΔE 1.9 from the original

Tritanopia#007A91no blue cones; rare, and affects men and women equally; ΔE 73.3 from the original

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

Contrast with white, large text6.2:1WCAG large text: AAA

Contrast with black, large text3.39:1WCAG large text: AA

Named colours

Royal blue · ΔE 11.2 Slate blue · ΔE 16.5 Medium slateblue · ΔE 16.7 Medium purple · ΔE 27.3 Dodgerblue · ΔE 29.5 Rebecca purple · ΔE 29.5

Nearest named CSS colourRoyal blue (#4169E1)ΔE 11.23, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#DB8400

Analogous#00C5DB, #1600DB

Triadic#DB0057, #57DB00

Split complementary#DB1600, #C4DB00

Tetradic#DB00C5, #DB8400, #00DB16

Tints, shades & saturation

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

Lighter +40%#A8CBFF

Lighter +30%#75ACFF

Lighter +20%#428DFF

Lighter +10%#0F6EFF

Darker −10%#0043A8

Darker −20%#002E75

Darker −30%#001A42

Darker −40%#00060F

More saturated +25%#0057DB

Less saturated −25%#1B5DC0

Channel breakdown

G87

B219

Red0 (0%)

Green87 (34.1%)

Blue219 (85.9%)

Hue216.16°

Saturation (HSL)100%

Lightness42.94%

Dominant channelBlue

Hex per channelR 00 · G 57 · B DB

Keep nerding

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#0057DB

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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