#170C57#170C57

#170C57 is a very dark, vivid blue. Relative luminance 0.011; OKLCH L 23.8% C 0.124 H 277.9°. Best body text is #FFFFFF at 17.12:1 contrast (WCAG AA passes).

Color values

HEX	#170C57
RGB	rgb(23, 12, 87)
HSL	hsl(249, 76%, 19%)
HSV	hsv(249, 86%, 34%)
CMYK	cmyk(73.6%, 86.2%, 0%, 65.9%)
CIE-LAB	lab(10.05, 30.29, -42.58)
CIE-LCH	lch(10.05, 52.26, 305.43°)
OKLab	oklab(23.81% 0.0171 -0.123)
OKLCH	oklch(23.81% 0.124 277.9)
XYZ	xyz(2.2046, 1.1330, 9.1175)
Luminance	0.0113 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170C57 #4C570C

analogous

#0C2757 #170C57 #3D0C57

triadic

#170C57 #57170C #0C5717

tetradic

#170C57 #570C27 #4C570C #0C573D

square

#170C57 #570C27 #4C570C #0C573D

split-complementary

#170C57 #573D0C #27570C

monochromatic

#07041B #090521 #170C57 #25138D #331BC3

Accessibility & contrast

On white

17.12

#170C57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#170C57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170C57

17.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170C57	#FFFFFF	#000000	##FFFFFF
##170C57	1.00	17.12	1.23	17.12
#FFFFFF	17.12	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E59

Deuteranopia (green-blind)

#001856

Tritanopia (blue-blind)

#002332

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #170c57;
/* rgb */ color: rgb(23, 12, 87);
/* oklch */ color: oklch(23.8% 0.124 277.9);

Tailwind

colors: {
  custom: {
    50: '#604d87',
    500: '#170c57',
    950: '#000000',
  },
}

SCSS

$custom: #170c57;
$custom-light: #604d87;
$custom-dark: #000000;

JSON

{
  "hex": "#170c57",
  "rgb": {
    "r": 23,
    "g": 12,
    "b": 87
  },
  "hsl": {
    "h": 248.8,
    "s": 75.758,
    "l": 19.412
  },
  "oklch": {
    "l": 0.2381,
    "c": 0.12419,
    "h": 277.9
  },
  "luminance": 0.01133
}

Semantic roles & 50–950 ramp

primary

#170C57

secondary

#83922D

accent

#F235D7

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05010B

muted

#7A777C

Preview Lab

Preview with #170C57

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

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