Colour

#173C54

#173C54
Blue
Dark
Nearest: Dark slate grey

#173C54 is a blue with RGB values 23, 60, 84 and HSL 204°, 57%, 21%. It is a dark colour, so white text on it reaches 11.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#173C54#173C54

HEX#173C54

RGBrgb(23, 60, 84)

RGB (0–1)0.0902, 0.2353, 0.3294

RGB percentages9%, 23.5%, 32.9%

HSLhsl(203.6, 57%, 21%)

HSV / HSBhsv(203.6, 72.6%, 32.9%)

CMYK72.6%, 28.6%, 0%, 67.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,522,772

CSS custom property--colour: #173C54;

Brightness & contrast

Relative luminance0.04054WCAG 2.x, 0 is black and 1 is white

Perceived brightness55.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.6:1

Contrast with white11.6:1WCAG normal text: AAA

Contrast with black1.81:1WCAG normal text: Fail

Greyscale equivalent#363636

Inverted#E8C3AB

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#313C55no red cones; affects about 1% of men; ΔE 7.5 from the original

Deuteranopia#293654no green cones; the most common form, about 1% of men; ΔE 8.6 from the original

Tritanopia#004244no blue cones; rare, and affects men and women equally; ΔE 17.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text11.6:1WCAG large text: AAA

Contrast with black, large text1.81:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 18 Dim grey · ΔE 27.9 Slate grey · ΔE 30.1 Black · ΔE 30.4 Steel blue · ΔE 31.8 Light slate grey · ΔE 32.9

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.99, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#542F17

Analogous#17544E, #171E54

Triadic#54173C, #3C5417

Split complementary#54171E, #544E17

Tetradic#4D1754, #542F17, #1E5417

Tints, shades & saturation

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

Lighter +40%#63A8D4

Lighter +30%#3B91C9

Lighter +20%#2D75A4

Lighter +10%#22597C

Darker −10%#0C1F2C

Darker −20%#010304

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0A3F61

Less saturated −25%#243947

Channel breakdown

R23

G60

B84

Red23 (9%)

Green60 (23.5%)

Blue84 (32.9%)

Hue203.61°

Saturation (HSL)57.01%

Lightness20.98%

Dominant channelBlue

Hex per channelR 17 · G 3C · B 54

Keep nerding

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

#173C54

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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