#171D5A#171D5A

#171D5A is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.108 H 272.5°. Best body text is #FFFFFF at 15.44:1 contrast (WCAG AA passes).

Color values

HEX	#171D5A
RGB	rgb(23, 29, 90)
HSL	hsl(235, 59%, 22%)
HSV	hsv(235, 74%, 35%)
CMYK	cmyk(74.4%, 67.8%, 0%, 64.7%)
CIE-LAB	lab(14.39, 20.37, -37.47)
CIE-LCH	lch(14.39, 42.65, 298.53°)
OKLab	oklab(27.02% 0.0047 -0.1081)
OKLCH	oklch(27.02% 0.108 272.5)
XYZ	xyz(2.6376, 1.7988, 9.8791)
Luminance	0.0180 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D5A #5A5417

analogous

#173F5A #171D5A #33175A

triadic

#171D5A #5A171D #1D5A17

tetradic

#171D5A #5A173F #5A5417 #175A33

square

#171D5A #5A173F #5A5417 #175A33

split-complementary

#171D5A #5A3317 #3F5A17

monochromatic

#060818 #0B0D29 #171D5A #232D8B #303CBB

Accessibility & contrast

On white

15.44

#171D5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.36

#171D5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D5A

15.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D5A	#FFFFFF	#000000	##FFFFFF
##171D5A	1.00	15.44	1.36	15.44
#FFFFFF	15.44	1.00	21.00	1.00
#000000	1.36	21.00	1.00	21.00
##FFFFFF	15.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285C

Deuteranopia (green-blind)

#002159

Tritanopia (blue-blind)

#002D38

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171d5a;
/* rgb */ color: rgb(23, 29, 90);
/* oklch */ color: oklch(27.0% 0.108 272.5);

Tailwind

colors: {
  custom: {
    50: '#5f5989',
    500: '#171d5a',
    950: '#000000',
  },
}

SCSS

$custom: #171d5a;
$custom-light: #5f5989;
$custom-dark: #000000;

JSON

{
  "hex": "#171d5a",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 90
  },
  "hsl": {
    "h": 234.627,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.27018,
    "c": 0.10824,
    "h": 272.5
  },
  "luminance": 0.01799
}

Semantic roles & 50–950 ramp

primary

#171D5A

secondary

#91893C

accent

#D445E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171D5A

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

Preview Lab → · Contrast checker → · Palette generator →