#171C5C#171C5C

#171C5C is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.113 H 272.7°. Best body text is #FFFFFF at 15.48:1 contrast (WCAG AA passes).

Color values

HEX	#171C5C
RGB	rgb(23, 28, 92)
HSL	hsl(236, 60%, 23%)
HSV	hsv(236, 75%, 36%)
CMYK	cmyk(75%, 69.6%, 0%, 63.9%)
CIE-LAB	lab(14.32, 21.88, -38.93)
CIE-LCH	lch(14.32, 44.66, 299.34°)
OKLab	oklab(27.02% 0.0054 -0.1124)
OKLCH	oklch(27.02% 0.113 272.7)
XYZ	xyz(2.6997, 1.7851, 10.3254)
Luminance	0.0179 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C5C #5C5717

analogous

#173F5C #171C5C #34175C

triadic

#171C5C #5C171C #1C5C17

tetradic

#171C5C #5C173F #5C5717 #175C34

square

#171C5C #5C173F #5C5717 #175C34

split-complementary

#171C5C #5C3417 #3F5C17

monochromatic

#060718 #0B0D2B #171C5C #232B8D #2F3ABE

Accessibility & contrast

On white

15.48

#171C5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#171C5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C5C

15.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C5C	#FFFFFF	#000000	##FFFFFF
##171C5C	1.00	15.48	1.36	15.48
#FFFFFF	15.48	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275E

Deuteranopia (green-blind)

#00215B

Tritanopia (blue-blind)

#002D39

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171c5c;
/* rgb */ color: rgb(23, 28, 92);
/* oklch */ color: oklch(27.0% 0.113 272.7);

Tailwind

colors: {
  custom: {
    50: '#5f588b',
    500: '#171c5c',
    950: '#000000',
  },
}

SCSS

$custom: #171c5c;
$custom-light: #5f588b;
$custom-dark: #000000;

JSON

{
  "hex": "#171c5c",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 92
  },
  "hsl": {
    "h": 235.652,
    "s": 60,
    "l": 22.549
  },
  "oklch": {
    "l": 0.27021,
    "c": 0.11258,
    "h": 272.7
  },
  "luminance": 0.01785
}

Semantic roles & 50–950 ramp

primary

#171C5C

secondary

#938D3C

accent

#D845E3

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171C5C

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

Preview Lab → · Contrast checker → · Palette generator →