#171E5B#171E5B

#171E5B is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.3% C 0.108 H 272.0°. Best body text is #FFFFFF at 15.29:1 contrast (WCAG AA passes).

Color values

HEX	#171E5B
RGB	rgb(23, 30, 91)
HSL	hsl(234, 60%, 22%)
HSV	hsv(234, 75%, 36%)
CMYK	cmyk(74.7%, 67%, 0%, 64.3%)
CIE-LAB	lab(14.77, 20.05, -37.53)
CIE-LCH	lch(14.77, 42.55, 298.11°)
OKLab	oklab(27.32% 0.0038 -0.1083)
OKLCH	oklch(27.32% 0.108 272)
XYZ	xyz(2.7053, 1.8658, 10.1131)
Luminance	0.0187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E5B #5B5417

analogous

#17405B #171E5B #32175B

triadic

#171E5B #5B171E #1E5B17

tetradic

#171E5B #5B1740 #5B5417 #175B32

square

#171E5B #5B1740 #5B5417 #175B32

split-complementary

#171E5B #5B3217 #405B17

monochromatic

#060818 #0B0E2A #171E5B #232E8C #303EBD

Accessibility & contrast

On white

15.29

#171E5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#171E5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E5B

15.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E5B	#FFFFFF	#000000	##FFFFFF
##171E5B	1.00	15.29	1.37	15.29
#FFFFFF	15.29	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285D

Deuteranopia (green-blind)

#00225A

Tritanopia (blue-blind)

#002E39

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171e5b;
/* rgb */ color: rgb(23, 30, 91);
/* oklch */ color: oklch(27.3% 0.108 272.0);

Tailwind

colors: {
  custom: {
    50: '#5f598a',
    500: '#171e5b',
    950: '#000000',
  },
}

SCSS

$custom: #171e5b;
$custom-light: #5f598a;
$custom-dark: #000000;

JSON

{
  "hex": "#171e5b",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 91
  },
  "hsl": {
    "h": 233.824,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.27321,
    "c": 0.10838,
    "h": 272
  },
  "luminance": 0.01866
}

Semantic roles & 50–950 ramp

primary

#171E5B

secondary

#92893C

accent

#D345E3

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171E5B

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

Preview Lab → · Contrast checker → · Palette generator →