#170C59#170C59

#170C59 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.1% C 0.127 H 277.4°. Best body text is #FFFFFF at 17.03:1 contrast (WCAG AA passes).

Color values

HEX	#170C59
RGB	rgb(23, 12, 89)
HSL	hsl(249, 76%, 20%)
HSV	hsv(249, 87%, 35%)
CMYK	cmyk(74.2%, 86.5%, 0%, 65.1%)
CIE-LAB	lab(10.31, 30.97, -43.52)
CIE-LCH	lch(10.31, 53.41, 305.44°)
OKLab	oklab(24.06% 0.0164 -0.1257)
OKLCH	oklch(24.06% 0.127 277.4)
XYZ	xyz(2.2874, 1.1662, 9.5538)
Luminance	0.0117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170C59 #4E590C

analogous

#0C2859 #170C59 #3D0C59

triadic

#170C59 #59170C #0C5917

tetradic

#170C59 #590C28 #4E590C #0C593D

square

#170C59 #590C28 #4E590C #0C593D

split-complementary

#170C59 #593D0C #28590C

monochromatic

#07041B #090523 #170C59 #25138F #331BC5

Accessibility & contrast

On white

17.03

#170C59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#170C59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170C59

17.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170C59	#FFFFFF	#000000	##FFFFFF
##170C59	1.00	17.03	1.23	17.03
#FFFFFF	17.03	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F5B

Deuteranopia (green-blind)

#001958

Tritanopia (blue-blind)

#002433

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #170c59;
/* rgb */ color: rgb(23, 12, 89);
/* oklch */ color: oklch(24.1% 0.127 277.4);

Tailwind

colors: {
  custom: {
    50: '#604d89',
    500: '#170c59',
    950: '#000000',
  },
}

SCSS

$custom: #170c59;
$custom-light: #604d89;
$custom-dark: #000000;

JSON

{
  "hex": "#170c59",
  "rgb": {
    "r": 23,
    "g": 12,
    "b": 89
  },
  "hsl": {
    "h": 248.571,
    "s": 76.238,
    "l": 19.804
  },
  "oklch": {
    "l": 0.24059,
    "c": 0.12681,
    "h": 277.4
  },
  "luminance": 0.01166
}

Semantic roles & 50–950 ramp

primary

#170C59

secondary

#85942D

accent

#F335D8

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05010C

muted

#79777D

Preview Lab

Preview with #170C59

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

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