Colour

#5173AD

#5173AD
Blue
Dark
Nearest: Steel blue

#5173AD is a blue with RGB values 81, 115, 173 and HSL 218°, 36%, 50%. It is a dark colour, so white text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#5173AD#5173AD

HEX#5173AD

RGBrgb(81, 115, 173)

RGB (0–1)0.3176, 0.451, 0.6784

RGB percentages31.8%, 45.1%, 67.8%

HSLhsl(217.8, 36.2%, 49.8%)

HSV / HSBhsv(217.8, 53.2%, 67.8%)

CMYK53.2%, 33.5%, 0%, 32.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,338,029

CSS custom property--colour: #5173AD;

Brightness & contrast

Relative luminance0.17028WCAG 2.x, 0 is black and 1 is white

Perceived brightness114.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.77:1

Contrast with white4.77:1WCAG normal text: AA

Contrast with black4.41:1WCAG normal text: Fail

Greyscale equivalent#707070

Inverted#AE8C52

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5C77AFno red cones; affects about 1% of men; ΔE 2.8 from the original

Deuteranopia#516FACno green cones; the most common form, about 1% of men; ΔE 2.8 from the original

Tritanopia#218088no blue cones; rare, and affects men and women equally; ΔE 36.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text4.77:1WCAG large text: AAA

Contrast with black, large text4.41:1WCAG large text: AA

Named colours

Steel blue · ΔE 10.2 Cornflower blue · ΔE 20.5 Slate grey · ΔE 25.5 Light slate grey · ΔE 25.8 Dark slateblue · ΔE 28.4 Dodgerblue · ΔE 31.2

Nearest named CSS colourSteel blue (#4682B4)ΔE 10.23, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#AD8B51

Analogous#51A1AD, #5D51AD

Triadic#AD5173, #73AD51

Split complementary#AD5D51, #A1AD51

Tetradic#AD51A1, #AD8B51, #51AD5D

Tints, shades & saturation

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

Lighter +40%#DCE3EE

Lighter +30%#B9C7DE

Lighter +20%#96ABCE

Lighter +10%#738FBE

Darker −10%#415C8A

Darker −20%#304568

Darker −30%#202E45

Darker −40%#101722

More saturated +25%#316BCD

Less saturated −25%#717B8D

Channel breakdown

R81

G115

B173

Red81 (31.8%)

Green115 (45.1%)

Blue173 (67.8%)

Hue217.83°

Saturation (HSL)36.22%

Lightness49.8%

Dominant channelBlue

Hex per channelR 51 · G 73 · B AD

Keep nerding

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#5173AD

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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