#171C5A#171C5A

#171C5A is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.8% C 0.110 H 272.9°. Best body text is #FFFFFF at 15.55:1 contrast (WCAG AA passes).

Color values

HEX	#171C5A
RGB	rgb(23, 28, 90)
HSL	hsl(236, 59%, 22%)
HSV	hsv(236, 74%, 35%)
CMYK	cmyk(74.4%, 68.9%, 0%, 64.7%)
CIE-LAB	lab(14.12, 21.09, -37.91)
CIE-LCH	lch(14.12, 43.38, 299.08°)
OKLab	oklab(26.82% 0.0055 -0.1095)
OKLCH	oklch(26.82% 0.11 272.9)
XYZ	xyz(2.6134, 1.7506, 9.8710)
Luminance	0.0175 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171C5A #5A5517

analogous

#173E5A #171C5A #33175A

triadic

#171C5A #5A171C #1C5A17

tetradic

#171C5A #5A173E #5A5517 #175A33

square

#171C5A #5A173E #5A5517 #175A33

split-complementary

#171C5A #5A3317 #3E5A17

monochromatic

#060818 #0B0D29 #171C5A #232B8B #303ABB

Accessibility & contrast

On white

15.55

#171C5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171C5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171C5A

15.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171C5A	#FFFFFF	#000000	##FFFFFF
##171C5A	1.00	15.55	1.35	15.55
#FFFFFF	15.55	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275C

Deuteranopia (green-blind)

#002159

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171c5a;
/* rgb */ color: rgb(23, 28, 90);
/* oklch */ color: oklch(26.8% 0.110 272.9);

Tailwind

colors: {
  custom: {
    50: '#5f5889',
    500: '#171c5a',
    950: '#000000',
  },
}

SCSS

$custom: #171c5a;
$custom-light: #5f5889;
$custom-dark: #000000;

JSON

{
  "hex": "#171c5a",
  "rgb": {
    "r": 23,
    "g": 28,
    "b": 90
  },
  "hsl": {
    "h": 235.522,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.26817,
    "c": 0.1096,
    "h": 272.9
  },
  "luminance": 0.01751
}

Semantic roles & 50–950 ramp

primary

#171C5A

secondary

#918B3C

accent

#D745E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171C5A

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

Preview Lab → · Contrast checker → · Palette generator →