#173A6F#173A6F

#173A6F is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.4% C 0.100 H 258.7°. Best body text is #FFFFFF at 11.22:1 contrast (WCAG AA passes).

Color values

HEX	#173A6F
RGB	rgb(23, 58, 111)
HSL	hsl(216, 66%, 26%)
HSV	hsv(216, 79%, 44%)
CMYK	cmyk(79.3%, 47.7%, 0%, 56.5%)
CIE-LAB	lab(24.81, 8.05, -34.35)
CIE-LCH	lch(24.81, 35.28, 283.20°)
OKLab	oklab(35.43% -0.0197 -0.0985)
OKLCH	oklch(35.43% 0.1 258.7)
XYZ	xyz(4.7346, 4.3554, 15.6270)
Luminance	0.0436 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A6F #6F4C17

analogous

#17666F #173A6F #20176F

triadic

#173A6F #6F173A #3A6F17

tetradic

#173A6F #6F1766 #6F4C17 #176F20

square

#173A6F #6F1766 #6F4C17 #176F20

split-complementary

#173A6F #6F2017 #666F17

monochromatic

#050D19 #0C203C #173A6F #2254A2 #2D6FD3

Accessibility & contrast

On white

11.22

#173A6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#173A6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A6F

11.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A6F	#FFFFFF	#000000	##FFFFFF
##173A6F	1.00	11.22	1.87	11.22
#FFFFFF	11.22	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E3F71

Deuteranopia (green-blind)

#0B376E

Tritanopia (blue-blind)

#00474F

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173a6f;
/* rgb */ color: rgb(23, 58, 111);
/* oklch */ color: oklch(35.4% 0.100 258.7);

Tailwind

colors: {
  custom: {
    50: '#626f99',
    500: '#173a6f',
    950: '#000000',
  },
}

SCSS

$custom: #173a6f;
$custom-light: #626f99;
$custom-dark: #000000;

JSON

{
  "hex": "#173a6f",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 111
  },
  "hsl": {
    "h": 216.136,
    "s": 65.672,
    "l": 26.275
  },
  "oklch": {
    "l": 0.35427,
    "c": 0.1004,
    "h": 258.7
  },
  "luminance": 0.04356
}

Semantic roles & 50–950 ramp

primary

#173A6F

secondary

#A57C3D

accent

#A53FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173A6F

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

Preview Lab → · Contrast checker → · Palette generator →