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Recognised as Colour

#577FA6

  • #577FA6
  • Blue
  • Dark
  • Nearest: Steel blue

#577FA6 is a blue with RGB values 87, 127, 166 and HSL 210°, 31%, 50%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#577FA6#577FA6
HEX#577FA6
RGBrgb(87, 127, 166)
RGB (0–1)0.3412, 0.498, 0.651
RGB percentages34.1%, 49.8%, 65.1%
HSLhsl(209.6, 31.2%, 49.6%)
HSV / HSBhsv(209.6, 47.6%, 65.1%)
CMYK47.6%, 23.5%, 0%, 34.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,734,310
CSS custom property--colour: #577FA6;

Brightness & contrast

Relative luminance0.19958WCAG 2.x, 0 is black and 1 is white
Perceived brightness122 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.99:1
Contrast with white4.21:1WCAG normal text: Fail
Contrast with black4.99:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#A88059

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6F80A8no red cones; affects about 1% of men; ΔE 7.1 from the original
Deuteranopia#6578A5no green cones; the most common form, about 1% of men; ΔE 7.8 from the original
Tritanopia#35888Cno blue cones; rare, and affects men and women equally; ΔE 25.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.21:1WCAG large text: AA
Contrast with black, large text4.99:1WCAG large text: AAA

Named colours

Steel blue · ΔE 7.2Slate grey · ΔE 14.6Light slate grey · ΔE 14.6Gray · ΔE 25.3Cadetblue · ΔE 26.1Dim grey · ΔE 26.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.21, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A67E57
Analogous#57A6A6, #5758A6
Triadic#A6577F, #7FA657
Split complementary#A65758, #A6A657
Tetradic#A657A6, #A67E57, #57A657

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DCE5ED
Lighter +30%#BBCBDB
Lighter +20%#99B2CA
Lighter +10%#7898B8
Darker −10%#456585
Darker −20%#344C63
Darker −30%#223242
Darker −40%#111920
More saturated +25%#377FC6
Less saturated −25%#777F86

Channel breakdown

R87
G127
B166
Red87 (34.1%)
Green127 (49.8%)
Blue166 (65.1%)
Hue209.62°
Saturation (HSL)31.23%
Lightness49.61%
Dominant channelBlue
Hex per channelR 57 · G 7F · B A6

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Every value on this page was computed from “577fa6” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.