Colour

#173C63

#173C63
Blue
Dark
Nearest: Dark slate grey

#173C63 is a blue with RGB values 23, 60, 99 and HSL 211°, 62%, 24%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#173C63#173C63

HEX#173C63

RGBrgb(23, 60, 99)

RGB (0–1)0.0902, 0.2353, 0.3882

RGB percentages9%, 23.5%, 38.8%

HSLhsl(210.8, 62.3%, 23.9%)

HSV / HSBhsv(210.8, 76.8%, 38.8%)

CMYK76.8%, 39.4%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,522,787

CSS custom property--colour: #173C63;

Brightness & contrast

Relative luminance0.04315WCAG 2.x, 0 is black and 1 is white

Perceived brightness58.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.27:1

Contrast with white11.27:1WCAG normal text: AAA

Contrast with black1.86:1WCAG normal text: Fail

Greyscale equivalent#373737

Inverted#E8C39C

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2A3E65no red cones; affects about 1% of men; ΔE 4 from the original

Deuteranopia#1F3762no green cones; the most common form, about 1% of men; ΔE 4.9 from the original

Tritanopia#00454Ano blue cones; rare, and affects men and women equally; ΔE 26.2 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text11.27:1WCAG large text: AAA

Contrast with black, large text1.86:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 27.5 Steel blue · ΔE 28.9 Dark slateblue · ΔE 29.4 Slate grey · ΔE 32.7 Dim grey · ΔE 33.3 Light slate grey · ΔE 35.2

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 27.51, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#633E17

Analogous#176263, #181763

Triadic#63173C, #3C6317

Split complementary#631817, #626317

Tetradic#631762, #633E17, #176318

Tints, shades & saturation

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

Lighter +40%#6AA1DC

Lighter +30%#4088D3

Lighter +20%#2A6EB6

Lighter +10%#21558C

Darker −10%#0D233A

Darker −20%#040A10

Darker −30%#000000

Darker −40%#000000

More saturated +25%#083C72

Less saturated −25%#263C54

Channel breakdown

R23

G60

B99

Red23 (9%)

Green60 (23.5%)

Blue99 (38.8%)

Hue210.79°

Saturation (HSL)62.3%

Lightness23.92%

Dominant channelBlue

Hex per channelR 17 · G 3C · B 63

Keep nerding

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

#173C63

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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