#172B8D#172B8D

#172B8D is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.9% C 0.163 H 267.4°. Best body text is #FFFFFF at 11.89:1 contrast (WCAG AA passes).

Color values

HEX	#172B8D
RGB	rgb(23, 43, 141)
HSL	hsl(230, 72%, 32%)
HSV	hsv(230, 84%, 55%)
CMYK	cmyk(83.7%, 69.5%, 0%, 44.7%)
CIE-LAB	lab(23.11, 30.77, -56.04)
CIE-LCH	lch(23.11, 63.93, 298.77°)
OKLab	oklab(34.94% -0.0075 -0.1623)
OKLCH	oklch(34.94% 0.163 267.4)
XYZ	xyz(6.0233, 3.8323, 25.6164)
Luminance	0.0383 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B8D #8D7917

analogous

#17668D #172B8D #3E178D

triadic

#172B8D #8D172B #2B8D17

tetradic

#172B8D #8D1766 #8D7917 #178D3E

square

#172B8D #8D1766 #8D7917 #178D3E

split-complementary

#172B8D #8D3E17 #668D17

monochromatic

#060B24 #0E1B58 #172B8D #203BC2 #3F5AE0

Accessibility & contrast

On white

11.89

#172B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#172B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B8D

11.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B8D	#FFFFFF	#000000	##FFFFFF
##172B8D	1.00	11.89	1.77	11.89
#FFFFFF	11.89	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D90

Deuteranopia (green-blind)

#00318B

Tritanopia (blue-blind)

#004658

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #172b8d;
/* rgb */ color: rgb(23, 43, 141);
/* oklch */ color: oklch(34.9% 0.163 267.4);

Tailwind

colors: {
  custom: {
    50: '#6b64af',
    500: '#172b8d',
    950: '#000000',
  },
}

SCSS

$custom: #172b8d;
$custom-light: #6b64af;
$custom-dark: #000000;

JSON

{
  "hex": "#172b8d",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 141
  },
  "hsl": {
    "h": 229.831,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.34938,
    "c": 0.16252,
    "h": 267.4
  },
  "luminance": 0.03833
}

Semantic roles & 50–950 ramp

primary

#172B8D

secondary

#C0AA40

accent

#D039EF

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080511

muted

#7B7A80

Preview Lab

Preview with #172B8D

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

Preview Lab → · Contrast checker → · Palette generator →