#173B77#173B77

#173B77 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.3% C 0.111 H 260.1°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#173B77
RGB	rgb(23, 59, 119)
HSL	hsl(218, 68%, 28%)
HSV	hsv(218, 81%, 47%)
CMYK	cmyk(80.7%, 50.4%, 0%, 53.3%)
CIE-LAB	lab(25.69, 10.68, -38.03)
CIE-LCH	lch(25.69, 39.50, 285.69°)
OKLab	oklab(36.28% -0.0191 -0.1093)
OKLCH	oklch(36.28% 0.111 260.1)
XYZ	xyz(5.2459, 4.6414, 18.0686)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B77 #775317

analogous

#176B77 #173B77 #231777

triadic

#173B77 #77173B #3B7717

tetradic

#173B77 #77176B #775317 #177723

square

#173B77 #77176B #775317 #177723

split-complementary

#173B77 #772317 #6B7717

monochromatic

#050D1A #0D2244 #173B77 #2154AA #316FD7

Accessibility & contrast

On white

10.89

#173B77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#173B77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B77

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B77	#FFFFFF	#000000	##FFFFFF
##173B77	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194279

Deuteranopia (green-blind)

#003976

Tritanopia (blue-blind)

#004953

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173b77;
/* rgb */ color: rgb(23, 59, 119);
/* oklch */ color: oklch(36.3% 0.111 260.1);

Tailwind

colors: {
  custom: {
    50: '#64709f',
    500: '#173b77',
    950: '#000000',
  },
}

SCSS

$custom: #173b77;
$custom-light: #64709f;
$custom-dark: #000000;

JSON

{
  "hex": "#173b77",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 119
  },
  "hsl": {
    "h": 217.5,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36281,
    "c": 0.11094,
    "h": 260.1
  },
  "luminance": 0.04642
}

Semantic roles & 50–950 ramp

primary

#173B77

secondary

#AC833E

accent

#AA3DEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173B77

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

Preview Lab → · Contrast checker → · Palette generator →