#170F57#170F57

#170F57 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.2% C 0.121 H 277.3°. Best body text is #FFFFFF at 16.90:1 contrast (WCAG AA passes).

Color values

HEX	#170F57
RGB	rgb(23, 15, 87)
HSL	hsl(247, 71%, 20%)
HSV	hsv(247, 83%, 34%)
CMYK	cmyk(73.6%, 82.8%, 0%, 65.9%)
CIE-LAB	lab(10.64, 28.59, -41.60)
CIE-LCH	lch(10.64, 50.48, 304.50°)
OKLab	oklab(24.22% 0.0154 -0.1202)
OKLCH	oklch(24.22% 0.121 277.3)
XYZ	xyz(2.2439, 1.2117, 9.1306)
Luminance	0.0121 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F57 #4F570F

analogous

#0F2B57 #170F57 #3B0F57

triadic

#170F57 #57170F #0F5717

tetradic

#170F57 #570F2B #4F570F #0F573B

square

#170F57 #570F2B #4F570F #0F573B

split-complementary

#170F57 #573B0F #2B570F

monochromatic

#07051A #090623 #170F57 #25188B #3321BF

Accessibility & contrast

On white

16.90

#170F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#170F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F57

16.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F57	#FFFFFF	#000000	##FFFFFF
##170F57	1.00	16.90	1.24	16.90
#FFFFFF	16.90	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002059

Deuteranopia (green-blind)

#001A56

Tritanopia (blue-blind)

#002432

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #170f57;
/* rgb */ color: rgb(23, 15, 87);
/* oklch */ color: oklch(24.2% 0.121 277.3);

Tailwind

colors: {
  custom: {
    50: '#5f4f87',
    500: '#170f57',
    950: '#000000',
  },
}

SCSS

$custom: #170f57;
$custom-light: #5f4f87;
$custom-dark: #000000;

JSON

{
  "hex": "#170f57",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 87
  },
  "hsl": {
    "h": 246.667,
    "s": 70.588,
    "l": 20
  },
  "oklch": {
    "l": 0.24222,
    "c": 0.12119,
    "h": 277.3
  },
  "luminance": 0.01212
}

Semantic roles & 50–950 ramp

primary

#170F57

secondary

#869131

accent

#ED3AD9

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05020B

muted

#7A787C

Preview Lab

Preview with #170F57

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

Preview Lab → · Contrast checker → · Palette generator →