#173F90#173F90

#173F90 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.2% C 0.142 H 262.3°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#173F90
RGB	rgb(23, 63, 144)
HSL	hsl(220, 72%, 33%)
HSV	hsv(220, 84%, 56%)
CMYK	cmyk(84%, 56.3%, 0%, 43.5%)
CIE-LAB	lab(28.77, 18.21, -48.63)
CIE-LCH	lch(28.77, 51.93, 290.53°)
OKLab	oklab(39.23% -0.0191 -0.1404)
OKLCH	oklch(39.23% 0.142 262.3)
XYZ	xyz(7.1631, 5.7499, 27.1125)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173F90 #906817

analogous

#177C90 #173F90 #2B1790

triadic

#173F90 #90173F #3F9017

tetradic

#173F90 #90177C #906817 #17902B

square

#173F90 #90177C #906817 #17902B

split-complementary

#173F90 #902B17 #7C9017

monochromatic

#061126 #0F285B #173F90 #1F56C5 #4176E1

Accessibility & contrast

On white

9.77

#173F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#173F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173F90

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173F90	#FFFFFF	#000000	##FFFFFF
##173F90	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A93

Deuteranopia (green-blind)

#003F8E

Tritanopia (blue-blind)

#005361

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #173f90;
/* rgb */ color: rgb(23, 63, 144);
/* oklch */ color: oklch(39.2% 0.142 262.3);

Tailwind

colors: {
  custom: {
    50: '#6b73b1',
    500: '#173f90',
    950: '#000000',
  },
}

SCSS

$custom: #173f90;
$custom-light: #6b73b1;
$custom-dark: #000000;

JSON

{
  "hex": "#173f90",
  "rgb": {
    "r": 23,
    "g": 63,
    "b": 144
  },
  "hsl": {
    "h": 220.165,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.39233,
    "c": 0.14168,
    "h": 262.3
  },
  "luminance": 0.05751
}

Semantic roles & 50–950 ramp

primary

#173F90

secondary

#C19742

accent

#B339EF

background

#F6F6FB

surface

#ECECF6

border

#C7C7D0

text

#080811

muted

#7A7B80

Preview Lab

Preview with #173F90

Body copy rendered with the generated semantic roles for this colour.

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