Colour

#17233A

#17233A
Blue
Dark
Nearest: Black

#17233A is a blue with RGB values 23, 35, 58 and HSL 219°, 43%, 16%. It is a dark colour, so white text on it reaches 15.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#17233A#17233A

HEX#17233A

RGBrgb(23, 35, 58)

RGB (0–1)0.0902, 0.1373, 0.2275

RGB percentages9%, 13.7%, 22.7%

HSLhsl(219.4, 43.2%, 15.9%)

HSV / HSBhsv(219.4, 60.3%, 22.7%)

CMYK60.3%, 39.7%, 0%, 77.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,516,346

CSS custom property--colour: #17233A;

Brightness & contrast

Relative luminance0.0169WCAG 2.x, 0 is black and 1 is white

Perceived brightness35.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 15.7:1

Contrast with white15.7:1WCAG normal text: AAA

Contrast with black1.34:1WCAG normal text: Fail

Greyscale equivalent#222222

Inverted#E8DCC5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#1A253Bno red cones; affects about 1% of men; ΔE 1.3 from the original

Deuteranopia#16223Ano green cones; the most common form, about 1% of men; ΔE 0.9 from the original

Tritanopia#06282Bno blue cones; rare, and affects men and women equally; ΔE 17.5 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text15.7:1WCAG large text: AAA

Contrast with black, large text1.34:1WCAG large text: Fail

Named colours

Black · ΔE 21.7 Dark slate grey · ΔE 26.1 Dim grey · ΔE 34.9 Dark slateblue · ΔE 38.5 Slate grey · ΔE 39.8 Steel blue · ΔE 42.4

Nearest named CSS colourBlack (#000000)ΔE 21.65, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#3A2E17

Analogous#17343A, #1D173A

Triadic#3A1723, #233A17

Split complementary#3A1D17, #343A17

Tetradic#3A1734, #3A2E17, #173A1D

Tints, shades & saturation

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

Lighter +40%#5E7FBF

Lighter +30%#4265A8

Lighter +20%#344F83

Lighter +10%#25395F

Darker −10%#090D15

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0D2044

Less saturated −25%#212630

Channel breakdown

R23

G35

B58

Red23 (9%)

Green35 (13.7%)

Blue58 (22.7%)

Hue219.43°

Saturation (HSL)43.21%

Lightness15.88%

Dominant channelBlue

Hex per channelR 17 · G 23 · B 3A

Keep nerding

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#17233A

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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