#171B61#171B61

#171B61 is a dark, vivid blue. Relative luminance 0.018; OKLCH L 27.4% C 0.121 H 272.6°. Best body text is #FFFFFF at 15.38:1 contrast (WCAG AA passes).

Color values

HEX	#171B61
RGB	rgb(23, 27, 97)
HSL	hsl(237, 62%, 24%)
HSV	hsv(237, 76%, 38%)
CMYK	cmyk(76.3%, 72.2%, 0%, 62%)
CIE-LAB	lab(14.56, 24.55, -41.86)
CIE-LCH	lch(14.56, 48.53, 300.38°)
OKLab	oklab(27.36% 0.0056 -0.121)
OKLCH	oklch(27.36% 0.121 272.6)
XYZ	xyz(2.9022, 1.8288, 11.5070)
Luminance	0.0183 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B61 #615D17

analogous

#174061 #171B61 #381761

triadic

#171B61 #61171B #1B6117

tetradic

#171B61 #611740 #615D17 #176138

square

#171B61 #611740 #615D17 #176138

split-complementary

#171B61 #613817 #406117

monochromatic

#060719 #0B0D30 #171B61 #232992 #2E37C4

Accessibility & contrast

On white

15.38

#171B61 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#171B61 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B61

15.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B61	#FFFFFF	#000000	##FFFFFF
##171B61	1.00	15.38	1.37	15.38
#FFFFFF	15.38	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002863

Deuteranopia (green-blind)

#002160

Tritanopia (blue-blind)

#002E3B

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171b61;
/* rgb */ color: rgb(23, 27, 97);
/* oklch */ color: oklch(27.4% 0.121 272.6);

Tailwind

colors: {
  custom: {
    50: '#61578f',
    500: '#171b61',
    950: '#000000',
  },
}

SCSS

$custom: #171b61;
$custom-light: #61578f;
$custom-dark: #000000;

JSON

{
  "hex": "#171b61",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 97
  },
  "hsl": {
    "h": 236.757,
    "s": 61.667,
    "l": 23.529
  },
  "oklch": {
    "l": 0.27355,
    "c": 0.12116,
    "h": 272.6
  },
  "luminance": 0.01829
}

Semantic roles & 50–950 ramp

primary

#171B61

secondary

#98933C

accent

#DC43E5

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #171B61

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

Preview Lab → · Contrast checker → · Palette generator →