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Colour

#0057B7

  • #0057B7
  • Blue
  • Dark
  • Nearest: Royal blue

#0057B7 is a blue with RGB values 0, 87, 183 and HSL 211°, 100%, 36%. 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

#0057B7#0057B7
HEX#0057B7
RGBrgb(0, 87, 183)
RGB (0–1)0, 0.3412, 0.7176
RGB percentages0%, 34.1%, 71.8%
HSLhsl(211.5, 100%, 35.9%)
HSV / HSBhsv(211.5, 100%, 71.8%)
CMYK100%, 52.5%, 0%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer22,455
CSS custom property--colour: #0057B7;

Brightness & contrast

Relative luminance0.10235WCAG 2.x, 0 is black and 1 is white
Perceived brightness90.9 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#4B4B4B
Inverted#FFA848

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0B62BAno red cones; affects about 1% of men; ΔE 7.7 from the original
Deuteranopia#0053B5no green cones; the most common form, about 1% of men; ΔE 2.4 from the original
Tritanopia#006F7Eno blue cones; rare, and affects men and women equally; ΔE 55.6 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 16.1Dark slateblue · ΔE 18.9Slate blue · ΔE 20.7Dodgerblue · ΔE 23.1Cornflower blue · ΔE 25.8Medium purple · ΔE 27
Nearest named CSS colourRoyal blue (#4169E1)ΔE 16.07, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B76000
Analogous#00B2B7, #0500B7
Triadic#B70057, #57B700
Split complementary#B70500, #B3B700
Tetradic#B700B2, #B76000, #00B705

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#84BEFF
Lighter +30%#51A4FF
Lighter +20%#1E89FF
Lighter +10%#006FEA
Darker −10%#003F84
Darker −20%#002751
Darker −30%#000E1E
Darker −40%#000000
More saturated +25%#0057B7
Less saturated −25%#1758A0

Channel breakdown

R0
G87
B183
Red0 (0%)
Green87 (34.1%)
Blue183 (71.8%)
Hue211.48°
Saturation (HSL)100%
Lightness35.88%
Dominant channelBlue
Hex per channelR 00 · G 57 · B B7

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Every value on this page was computed from “0057b7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.