#173A70#173A70

#173A70 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.5% C 0.102 H 259.0°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#173A70
RGB	rgb(23, 58, 112)
HSL	hsl(216, 66%, 26%)
HSV	hsv(216, 79%, 44%)
CMYK	cmyk(79.5%, 48.2%, 0%, 56.1%)
CIE-LAB	lab(24.88, 8.47, -34.87)
CIE-LCH	lch(24.88, 35.89, 283.65°)
OKLab	oklab(35.5% -0.0195 -0.1)
OKLCH	oklch(35.5% 0.102 259)
XYZ	xyz(4.7900, 4.3776, 15.9186)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A70 #704D17

analogous

#176770 #173A70 #201770

triadic

#173A70 #70173A #3A7017

tetradic

#173A70 #701767 #704D17 #177020

square

#173A70 #701767 #704D17 #177020

split-complementary

#173A70 #702017 #677017

monochromatic

#050D19 #0D203D #173A70 #2154A3 #2D6FD4

Accessibility & contrast

On white

11.20

#173A70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#173A70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A70

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A70	#FFFFFF	#000000	##FFFFFF
##173A70	1.00	11.20	1.88	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E3F72

Deuteranopia (green-blind)

#09376F

Tritanopia (blue-blind)

#00474F

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173a70;
/* rgb */ color: rgb(23, 58, 112);
/* oklch */ color: oklch(35.5% 0.102 259.0);

Tailwind

colors: {
  custom: {
    50: '#626f99',
    500: '#173a70',
    950: '#000000',
  },
}

SCSS

$custom: #173a70;
$custom-light: #626f99;
$custom-dark: #000000;

JSON

{
  "hex": "#173a70",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 112
  },
  "hsl": {
    "h": 216.404,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.35503,
    "c": 0.1019,
    "h": 259
  },
  "luminance": 0.04378
}

Semantic roles & 50–950 ramp

primary

#173A70

secondary

#A67D3D

accent

#A63FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173A70

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

Preview Lab → · Contrast checker → · Palette generator →