#173B76#173B76

#173B76 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.2% C 0.109 H 259.9°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#173B76
RGB	rgb(23, 59, 118)
HSL	hsl(217, 67%, 28%)
HSV	hsv(217, 81%, 46%)
CMYK	cmyk(80.5%, 50%, 0%, 53.7%)
CIE-LAB	lab(25.62, 10.26, -37.51)
CIE-LCH	lch(25.62, 38.89, 285.30°)
OKLab	oklab(36.2% -0.0193 -0.1078)
OKLCH	oklch(36.2% 0.109 259.9)
XYZ	xyz(5.1861, 4.6175, 17.7540)
Luminance	0.0462 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B76 #765217

analogous

#176B76 #173B76 #221776

triadic

#173B76 #76173B #3B7617

tetradic

#173B76 #76176B #765217 #177622

square

#173B76 #76176B #765217 #177622

split-complementary

#173B76 #762217 #6B7617

monochromatic

#050D1A #0D2143 #173B76 #2155A9 #3170D7

Accessibility & contrast

On white

10.92

#173B76 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#173B76 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B76

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B76	#FFFFFF	#000000	##FFFFFF
##173B76	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A4178

Deuteranopia (green-blind)

#003975

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173b76;
/* rgb */ color: rgb(23, 59, 118);
/* oklch */ color: oklch(36.2% 0.109 259.9);

Tailwind

colors: {
  custom: {
    50: '#64709e',
    500: '#173b76',
    950: '#000000',
  },
}

SCSS

$custom: #173b76;
$custom-light: #64709e;
$custom-dark: #000000;

JSON

{
  "hex": "#173b76",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 118
  },
  "hsl": {
    "h": 217.263,
    "s": 67.376,
    "l": 27.647
  },
  "oklch": {
    "l": 0.36203,
    "c": 0.10947,
    "h": 259.9
  },
  "luminance": 0.04618
}

Semantic roles & 50–950 ramp

primary

#173B76

secondary

#AB823E

accent

#A93EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173B76

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

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