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Recognised as Colour

#577DC6

  • #577DC6
  • Blue
  • Dark
  • Nearest: Cornflower blue

#577DC6 is a blue with RGB values 87, 125, 198 and HSL 219°, 49%, 56%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#577DC6#577DC6
HEX#577DC6
RGBrgb(87, 125, 198)
RGB (0–1)0.3412, 0.4902, 0.7765
RGB percentages34.1%, 49%, 77.6%
HSLhsl(219.5, 49.3%, 55.9%)
HSV / HSBhsv(219.5, 56.1%, 77.6%)
CMYK56.1%, 36.9%, 0%, 22.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,733,830
CSS custom property--colour: #577DC6;

Brightness & contrast

Relative luminance0.20771WCAG 2.x, 0 is black and 1 is white
Perceived brightness126.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.15:1
Contrast with white4.07:1WCAG normal text: Fail
Contrast with black5.15:1WCAG normal text: AA
Greyscale equivalent#7A7A7A
Inverted#A88239

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5F83C9no red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#5179C4no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#0A8D98no blue cones; rare, and affects men and women equally; ΔE 44.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.07:1WCAG large text: AA
Contrast with black, large text5.15:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.8Steel blue · ΔE 15.9Dodgerblue · ΔE 22.4Dark slateblue · ΔE 28.1Medium purple · ΔE 29.7Royal blue · ΔE 29.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.76, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C6A057
Analogous#57B4C6, #6957C6
Triadic#C6577D, #7DC657
Split complementary#C66957, #B4C657
Tetradic#C657B5, #C6A057, #57C669

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EFF3FA
Lighter +30%#C9D5ED
Lighter +20%#A3B8E0
Lighter +10%#7D9AD3
Darker −10%#3B63AF
Darker −20%#2E4D89
Darker −30%#213863
Darker −40%#15223C
More saturated +25%#3B74E2
Less saturated −25%#7386AA

Channel breakdown

R87
G125
B198
Red87 (34.1%)
Green125 (49%)
Blue198 (77.6%)
Hue219.46°
Saturation (HSL)49.33%
Lightness55.88%
Dominant channelBlue
Hex per channelR 57 · G 7D · B C6

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Every value on this page was computed from “577dc6” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.