Colour

#171B3F

#171B3F
Blue
Dark
Nearest: Black

#171B3F is a blue with RGB values 23, 27, 63 and HSL 234°, 47%, 17%. It is a dark colour, so white text on it reaches 16.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#171B3F#171B3F

HEX#171B3F

RGBrgb(23, 27, 63)

RGB (0–1)0.0902, 0.1059, 0.2471

RGB percentages9%, 10.6%, 24.7%

HSLhsl(234, 46.5%, 16.9%)

HSV / HSBhsv(234, 63.5%, 24.7%)

CMYK63.5%, 57.1%, 0%, 75.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,514,303

CSS custom property--colour: #171B3F;

Brightness & contrast

Relative luminance0.01325WCAG 2.x, 0 is black and 1 is white

Perceived brightness32.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.6:1

Contrast with white16.6:1WCAG normal text: AAA

Contrast with black1.26:1WCAG normal text: Fail

Greyscale equivalent#1D1D1D

Inverted#E8E4C0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#092040no red cones; affects about 1% of men; ΔE 6.4 from the original

Deuteranopia#041D3Eno green cones; the most common form, about 1% of men; ΔE 5.7 from the original

Tritanopia#03232Ano 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 text16.6:1WCAG large text: AAA

Contrast with black, large text1.26:1WCAG large text: Fail

Named colours

Black · ΔE 28.5 Dark slateblue · ΔE 30.7 Midnight blue · ΔE 33.5 Dark slate grey · ΔE 36.1 Dim grey · ΔE 42 Steel blue · ΔE 44.5

Nearest named CSS colourBlack (#000000)ΔE 28.49, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#3F3B17

Analogous#172F3F, #27173F

Triadic#3F171B, #1B3F17

Split complementary#3F2717, #2F3F17

Tetradic#3F172F, #3F3B17, #173F27

Tints, shades & saturation

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

Lighter +40%#5E68C4

Lighter +30%#404BAF

Lighter +20%#323B8A

Lighter +10%#252B64

Darker −10%#090B1A

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0C124A

Less saturated −25%#222434

Channel breakdown

R23

G27

B63

Red23 (9%)

Green27 (10.6%)

Blue63 (24.7%)

Hue234°

Saturation (HSL)46.51%

Lightness16.86%

Dominant channelBlue

Hex per channelR 17 · G 1B · B 3F

Keep nerding

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

#171B3F

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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