Colour

#17577B

#17577B
Blue
Dark
Nearest: Steel blue

#17577B is a blue with RGB values 23, 87, 123 and HSL 202°, 68%, 29%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#17577B#17577B

HEX#17577B

RGBrgb(23, 87, 123)

RGB (0–1)0.0902, 0.3412, 0.4824

RGB percentages9%, 34.1%, 48.2%

HSLhsl(201.6, 68.5%, 28.6%)

HSV / HSBhsv(201.6, 81.3%, 48.2%)

CMYK81.3%, 29.3%, 0%, 51.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,529,723

CSS custom property--colour: #17577B;

Brightness & contrast

Relative luminance0.08429WCAG 2.x, 0 is black and 1 is white

Perceived brightness79.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.82:1

Contrast with white7.82:1WCAG normal text: AAA

Contrast with black2.69:1WCAG normal text: Fail

Greyscale equivalent#4C4C4C

Inverted#E8A884

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#46577Dno red cones; affects about 1% of men; ΔE 11.1 from the original

Deuteranopia#384E7Ano green cones; the most common form, about 1% of men; ΔE 11.8 from the original

Tritanopia#006064no blue cones; rare, and affects men and women equally; ΔE 23.1 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text7.82:1WCAG large text: AAA

Contrast with black, large text2.69:1WCAG large text: Fail

Named colours

Steel blue · ΔE 18.8 Dark slate grey · ΔE 23.2 Slate grey · ΔE 24 Light slate grey · ΔE 26.1 Dim grey · ΔE 28.4 Teal · ΔE 31.5

Nearest named CSS colourSteel blue (#4682B4)ΔE 18.82, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#7B3B17

Analogous#177B6D, #17257B

Triadic#7B1757, #577B17

Split complementary#7B1725, #7B6D17

Tetradic#6D177B, #7B3B17, #257B17

Tints, shades & saturation

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

Lighter +40%#78BEE6

Lighter +30%#4DAADE

Lighter +20%#2794D1

Lighter +10%#1F75A6

Darker −10%#0F3950

Darker −20%#071A25

Darker −30%#000000

Darker −40%#000000

More saturated +25%#055C8D

Less saturated −25%#295269

Channel breakdown

R23

G87

B123

Red23 (9%)

Green87 (34.1%)

Blue123 (48.2%)

Hue201.6°

Saturation (HSL)68.49%

Lightness28.63%

Dominant channelBlue

Hex per channelR 17 · G 57 · B 7B

Keep nerding

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

#17577B

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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