#173A76#173A76

#173A76 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.0% C 0.111 H 260.4°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#173A76
RGB	rgb(23, 58, 118)
HSL	hsl(218, 67%, 28%)
HSV	hsv(218, 81%, 46%)
CMYK	cmyk(80.5%, 50.8%, 0%, 53.7%)
CIE-LAB	lab(25.31, 10.97, -38.01)
CIE-LCH	lch(25.31, 39.56, 286.10°)
OKLab	oklab(35.97% -0.0184 -0.1092)
OKLCH	oklch(35.97% 0.111 260.4)
XYZ	xyz(5.1352, 4.5157, 17.7370)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A76 #765317

analogous

#176976 #173A76 #241776

triadic

#173A76 #76173A #3A7617

tetradic

#173A76 #761769 #765317 #177624

square

#173A76 #761769 #765317 #177624

split-complementary

#173A76 #762417 #697617

monochromatic

#050D1A #0D2143 #173A76 #2153A9 #316ED7

Accessibility & contrast

On white

11.03

#173A76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#173A76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A76

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A76	#FFFFFF	#000000	##FFFFFF
##173A76	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174178

Deuteranopia (green-blind)

#003875

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173a76;
/* rgb */ color: rgb(23, 58, 118);
/* oklch */ color: oklch(36.0% 0.111 260.4);

Tailwind

colors: {
  custom: {
    50: '#646f9e',
    500: '#173a76',
    950: '#000000',
  },
}

SCSS

$custom: #173a76;
$custom-light: #646f9e;
$custom-dark: #000000;

JSON

{
  "hex": "#173a76",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 118
  },
  "hsl": {
    "h": 217.895,
    "s": 67.376,
    "l": 27.647
  },
  "oklch": {
    "l": 0.35967,
    "c": 0.11078,
    "h": 260.4
  },
  "luminance": 0.04516
}

Semantic roles & 50–950 ramp

primary

#173A76

secondary

#AB833E

accent

#AB3EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173A76

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

Preview Lab → · Contrast checker → · Palette generator →