#171C5B#171C5B

#171C5B is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.9% C 0.111 H 272.8°. Best body text is #FFFFFF at 15.51:1 contrast (WCAG AA passes).

Color values

HEX	#171C5B
RGB	rgb(23, 28, 91)
HSL	hsl(236, 60%, 22%)
HSV	hsv(236, 75%, 36%)
CMYK	cmyk(74.7%, 69.2%, 0%, 64.3%)
CIE-LAB	lab(14.22, 21.49, -38.43)
CIE-LCH	lch(14.22, 44.02, 299.21°)
OKLab	oklab(26.92% 0.0054 -0.111)
OKLCH	oklch(26.92% 0.111 272.8)
XYZ	xyz(2.6563, 1.7677, 10.0967)
Luminance	0.0177 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C5B #5B5617

analogous

#173E5B #171C5B #34175B

triadic

#171C5B #5B171C #1C5B17

tetradic

#171C5B #5B173E #5B5617 #175B34

square

#171C5B #5B173E #5B5617 #175B34

split-complementary

#171C5B #5B3417 #3E5B17

monochromatic

#060818 #0B0D2A #171C5B #232B8C #303ABD

Accessibility & contrast

On white

15.51

#171C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C5B

15.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C5B	#FFFFFF	#000000	##FFFFFF
##171C5B	1.00	15.51	1.35	15.51
#FFFFFF	15.51	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275D

Deuteranopia (green-blind)

#00215A

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171c5b;
/* rgb */ color: rgb(23, 28, 91);
/* oklch */ color: oklch(26.9% 0.111 272.8);

Tailwind

colors: {
  custom: {
    50: '#5f588a',
    500: '#171c5b',
    950: '#000000',
  },
}

SCSS

$custom: #171c5b;
$custom-light: #5f588a;
$custom-dark: #000000;

JSON

{
  "hex": "#171c5b",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 91
  },
  "hsl": {
    "h": 235.588,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.26919,
    "c": 0.11109,
    "h": 272.8
  },
  "luminance": 0.01768
}

Semantic roles & 50–950 ramp

primary

#171C5B

secondary

#928C3C

accent

#D745E3

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171C5B

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

Preview Lab → · Contrast checker → · Palette generator →