Colour

#175A81

#175A81
Blue
Dark
Nearest: Steel blue

#175A81 is a blue with RGB values 23, 90, 129 and HSL 202°, 70%, 30%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#175A81#175A81

HEX#175A81

RGBrgb(23, 90, 129)

RGB (0–1)0.0902, 0.3529, 0.5059

RGB percentages9%, 35.3%, 50.6%

HSLhsl(202.1, 69.7%, 29.8%)

HSV / HSBhsv(202.1, 82.2%, 50.6%)

CMYK82.2%, 30.2%, 0%, 49.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,530,497

CSS custom property--colour: #175A81;

Brightness & contrast

Relative luminance0.09079WCAG 2.x, 0 is black and 1 is white

Perceived brightness82.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.46:1

Contrast with white7.46:1WCAG normal text: AAA

Contrast with black2.82:1WCAG normal text: Fail

Greyscale equivalent#4F4F4F

Inverted#E8A57E

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#485A83no red cones; affects about 1% of men; ΔE 11.1 from the original

Deuteranopia#395180no green cones; the most common form, about 1% of men; ΔE 11.7 from the original

Tritanopia#006468no blue cones; rare, and affects men and women equally; ΔE 25 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text7.46:1WCAG large text: AAA

Contrast with black, large text2.82:1WCAG large text: Fail

Named colours

Steel blue · ΔE 17 Slate grey · ΔE 24.2 Dark slate grey · ΔE 25.1 Light slate grey · ΔE 26 Dim grey · ΔE 29.4 Teal · ΔE 32.3

Nearest named CSS colourSteel blue (#4682B4)ΔE 17.05, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#813E17

Analogous#178173, #172581

Triadic#81175A, #5A8117

Split complementary#811725, #817317

Tetradic#731781, #813E17, #258117

Tints, shades & saturation

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

Lighter +40%#7CC0E8

Lighter +30%#51ABE0

Lighter +20%#2696D8

Lighter +10%#1F78AC

Darker −10%#0F3C56

Darker −20%#081E2A

Darker −30%#000000

Darker −40%#000000

More saturated +25%#045F94

Less saturated −25%#2A556E

Channel breakdown

R23

G90

B129

Red23 (9%)

Green90 (35.3%)

Blue129 (50.6%)

Hue202.08°

Saturation (HSL)69.74%

Lightness29.8%

Dominant channelBlue

Hex per channelR 17 · G 5A · B 81

Keep nerding

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

#175A81

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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