Colour

#577D9C

#577D9C
Blue
Dark
Nearest: Slate grey

#577D9C is a blue with RGB values 87, 125, 156 and HSL 207°, 28%, 48%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#577D9C#577D9C

HEX#577D9C

RGBrgb(87, 125, 156)

RGB (0–1)0.3412, 0.4902, 0.6118

RGB percentages34.1%, 49%, 61.2%

HSLhsl(207, 28.4%, 47.6%)

HSV / HSBhsv(207, 44.2%, 61.2%)

CMYK44.2%, 19.9%, 0%, 38.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,733,788

CSS custom property--colour: #577D9C;

Brightness & contrast

Relative luminance0.19094WCAG 2.x, 0 is black and 1 is white

Perceived brightness119.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.82:1

Contrast with white4.36:1WCAG normal text: Fail

Contrast with black4.82:1WCAG normal text: AA

Greyscale equivalent#777777

Inverted#A88263

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#707D9Dno red cones; affects about 1% of men; ΔE 8.1 from the original

Deuteranopia#67769Bno green cones; the most common form, about 1% of men; ΔE 8.5 from the original

Tritanopia#3C8487no blue cones; rare, and affects men and women equally; ΔE 20.8 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text4.36:1WCAG large text: AA

Contrast with black, large text4.82:1WCAG large text: AAA

Named colours

Slate grey · ΔE 10.8 Light slate grey · ΔE 11.3 Steel blue · ΔE 11.5 Gray · ΔE 21.5 Dim grey · ΔE 22.3 Cadetblue · ΔE 22.6

Nearest named CSS colourSlate grey (#708090)ΔE 10.77, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#9C7657

Analogous#579C99, #575A9C

Triadic#9C577D, #7D9C57

Split complementary#9C575A, #9C9957

Tetradic#99579C, #9C7657, #5B9C57

Tints, shades & saturation

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

Lighter +40%#D7E0E8

Lighter +30%#B6C8D6

Lighter +20%#95AFC4

Lighter +10%#7496B2

Darker −10%#45637B

Darker −20%#32495B

Darker −30%#202E3A

Darker −40%#0E1419

More saturated +25%#3980BA

Less saturated −25%#757A7E

Channel breakdown

R87

G125

B156

Red87 (34.1%)

Green125 (49%)

Blue156 (61.2%)

Hue206.96°

Saturation (HSL)28.4%

Lightness47.65%

Dominant channelBlue

Hex per channelR 57 · G 7D · B 9C

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#577D9C

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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