#170F59#170F59

#170F59 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.5% C 0.124 H 276.9°. Best body text is #FFFFFF at 16.81:1 contrast (WCAG AA passes).

Color values

HEX	#170F59
RGB	rgb(23, 15, 89)
HSL	hsl(246, 71%, 20%)
HSV	hsv(246, 83%, 35%)
CMYK	cmyk(74.2%, 83.1%, 0%, 65.1%)
CIE-LAB	lab(10.88, 29.30, -42.56)
CIE-LCH	lch(10.88, 51.67, 304.54°)
OKLab	oklab(24.46% 0.0148 -0.123)
OKLCH	oklch(24.46% 0.124 276.9)
XYZ	xyz(2.3268, 1.2449, 9.5669)
Luminance	0.0124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F59 #51590F

analogous

#0F2C59 #170F59 #3C0F59

triadic

#170F59 #59170F #0F5917

tetradic

#170F59 #590F2C #51590F #0F593C

square

#170F59 #590F2C #51590F #0F593C

split-complementary

#170F59 #593C0F #2C590F

monochromatic

#07041A #090625 #170F59 #25188D #3221C2

Accessibility & contrast

On white

16.81

#170F59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#170F59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F59

16.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F59	#FFFFFF	#000000	##FFFFFF
##170F59	1.00	16.81	1.25	16.81
#FFFFFF	16.81	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205B

Deuteranopia (green-blind)

#001A58

Tritanopia (blue-blind)

#002533

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #170f59;
/* rgb */ color: rgb(23, 15, 89);
/* oklch */ color: oklch(24.5% 0.124 276.9);

Tailwind

colors: {
  custom: {
    50: '#604f89',
    500: '#170f59',
    950: '#000000',
  },
}

SCSS

$custom: #170f59;
$custom-light: #604f89;
$custom-dark: #000000;

JSON

{
  "hex": "#170f59",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 89
  },
  "hsl": {
    "h": 246.486,
    "s": 71.154,
    "l": 20.392
  },
  "oklch": {
    "l": 0.24462,
    "c": 0.12389,
    "h": 276.9
  },
  "luminance": 0.01245
}

Semantic roles & 50–950 ramp

primary

#170F59

secondary

#889331

accent

#EE3ADA

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05020C

muted

#7A787D

Preview Lab

Preview with #170F59

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

Preview Lab → · Contrast checker → · Palette generator →