#173A77#173A77

#173A77 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.0% C 0.112 H 260.6°. Best body text is #FFFFFF at 11.01:1 contrast (WCAG AA passes).

Color values

HEX	#173A77
RGB	rgb(23, 58, 119)
HSL	hsl(218, 68%, 28%)
HSV	hsv(218, 81%, 47%)
CMYK	cmyk(80.7%, 51.3%, 0%, 53.3%)
CIE-LAB	lab(25.38, 11.39, -38.52)
CIE-LCH	lch(25.38, 40.17, 286.47°)
OKLab	oklab(36.05% -0.0182 -0.1108)
OKLCH	oklch(36.05% 0.112 260.6)
XYZ	xyz(5.1950, 4.5396, 18.0516)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A77 #775417

analogous

#176A77 #173A77 #241777

triadic

#173A77 #77173A #3A7717

tetradic

#173A77 #77176A #775417 #177724

square

#173A77 #77176A #775417 #177724

split-complementary

#173A77 #772417 #6A7717

monochromatic

#050C1A #0D2144 #173A77 #2153AA #316ED7

Accessibility & contrast

On white

11.01

#173A77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#173A77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A77

11.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A77	#FFFFFF	#000000	##FFFFFF
##173A77	1.00	11.01	1.91	11.01
#FFFFFF	11.01	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164179

Deuteranopia (green-blind)

#003876

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173a77;
/* rgb */ color: rgb(23, 58, 119);
/* oklch */ color: oklch(36.0% 0.112 260.6);

Tailwind

colors: {
  custom: {
    50: '#646f9f',
    500: '#173a77',
    950: '#000000',
  },
}

SCSS

$custom: #173a77;
$custom-light: #646f9f;
$custom-dark: #000000;

JSON

{
  "hex": "#173a77",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 119
  },
  "hsl": {
    "h": 218.125,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36046,
    "c": 0.11225,
    "h": 260.6
  },
  "luminance": 0.0454
}

Semantic roles & 50–950 ramp

primary

#173A77

secondary

#AC843E

accent

#AB3DEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173A77

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

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