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Recognised as Colour

#577EFF

  • #577EFF
  • Blue
  • Dark
  • Nearest: Royal blue

#577EFF is a blue with RGB values 87, 126, 255 and HSL 226°, 100%, 67%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#577EFF#577EFF
HEX#577EFF
RGBrgb(87, 126, 255)
RGB (0–1)0.3412, 0.4941, 1
RGB percentages34.1%, 49.4%, 100%
HSLhsl(226.1, 100%, 67.1%)
HSV / HSBhsv(226.1, 65.9%, 100%)
CMYK65.9%, 50.6%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,734,143
CSS custom property--colour: #577EFF;

Brightness & contrast

Relative luminance0.24168WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.83:1
Contrast with white3.6:1WCAG normal text: Fail
Contrast with black5.83:1WCAG normal text: AA
Greyscale equivalent#7F7F7F
Inverted#A88100

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#308FFFno red cones; affects about 1% of men; ΔE 16.2 from the original
Deuteranopia#0080FCno green cones; the most common form, about 1% of men; ΔE 9.5 from the original
Tritanopia#009CB3no blue cones; rare, and affects men and women equally; ΔE 70.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.6:1WCAG large text: AA
Contrast with black, large text5.83:1WCAG large text: AAA

Named colours

Royal blue · ΔE 9Medium slateblue · ΔE 15.1Slate blue · ΔE 17.8Dodgerblue · ΔE 17.9Medium purple · ΔE 20.8Cornflower blue · ΔE 26.5
Nearest named CSS colourRoyal blue (#4169E1)ΔE 8.98, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFD857
Analogous#57D2FF, #8457FF
Triadic#FF577E, #7EFF57
Split complementary#FF8457, #D2FF57
Tetradic#FF57D2, #FFD857, #57FF84

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#F0F3FF
Lighter +20%#BDCCFF
Lighter +10%#8AA5FF
Darker −10%#2457FF
Darker −20%#0038F0
Darker −30%#002CBD
Darker −40%#00208A
More saturated +25%#577EFF
Less saturated −25%#6C89EA

Channel breakdown

R87
G126
B255
Red87 (34.1%)
Green126 (49.4%)
Blue255 (100%)
Hue226.07°
Saturation (HSL)100%
Lightness67.06%
Dominant channelBlue
Hex per channelR 57 · G 7E · B FF

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Every value on this page was computed from “577eff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.