#171858#171858

#171858 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.8% C 0.112 H 274.6°. Best body text is #FFFFFF at 16.06:1 contrast (WCAG AA passes).

Color values

HEX	#171858
RGB	rgb(23, 24, 88)
HSL	hsl(239, 59%, 22%)
HSV	hsv(239, 74%, 35%)
CMYK	cmyk(73.9%, 72.7%, 0%, 65.5%)
CIE-LAB	lab(12.86, 23.12, -38.63)
CIE-LCH	lch(12.86, 45.03, 300.90°)
OKLab	oklab(25.84% 0.0089 -0.1116)
OKLCH	oklch(25.84% 0.112 274.6)
XYZ	xyz(2.4409, 1.5398, 9.3992)
Luminance	0.0154 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171858 #585717

analogous

#173958 #171858 #371758

triadic

#171858 #581718 #185817

tetradic

#171858 #581739 #585717 #175837

square

#171858 #581739 #585717 #175837

split-complementary

#171858 #583717 #395817

monochromatic

#060718 #0A0B27 #171858 #242589 #3032B9

Accessibility & contrast

On white

16.06

#171858 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#171858 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171858

16.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171858	#FFFFFF	#000000	##FFFFFF
##171858	1.00	16.06	1.31	16.06
#FFFFFF	16.06	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00245A

Deuteranopia (green-blind)

#001E57

Tritanopia (blue-blind)

#002935

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #171858;
/* rgb */ color: rgb(23, 24, 88);
/* oklch */ color: oklch(25.8% 0.112 274.6);

Tailwind

colors: {
  custom: {
    50: '#5f5588',
    500: '#171858',
    950: '#000000',
  },
}

SCSS

$custom: #171858;
$custom-light: #5f5588;
$custom-dark: #000000;

JSON

{
  "hex": "#171858",
  "rgb": {
    "r": 23,
    "g": 24,
    "b": 88
  },
  "hsl": {
    "h": 239.077,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.25836,
    "c": 0.11195,
    "h": 274.6
  },
  "luminance": 0.0154
}

Semantic roles & 50–950 ramp

primary

#171858

secondary

#8F8E3C

accent

#DF46E2

background

#F5F4F8

surface

#EAE8F0

border

#C6C4CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #171858

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

Preview Lab → · Contrast checker → · Palette generator →