#170D57#170D57

#170D57 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 23.9% C 0.123 H 277.7°. Best body text is #FFFFFF at 17.05:1 contrast (WCAG AA passes).

Color values

HEX	#170D57
RGB	rgb(23, 13, 87)
HSL	hsl(248, 74%, 20%)
HSV	hsv(248, 85%, 34%)
CMYK	cmyk(73.6%, 85.1%, 0%, 65.9%)
CIE-LAB	lab(10.24, 29.74, -42.27)
CIE-LCH	lch(10.24, 51.68, 305.14°)
OKLab	oklab(23.94% 0.0166 -0.1221)
OKLCH	oklch(23.94% 0.123 277.7)
XYZ	xyz(2.2170, 1.1579, 9.1216)
Luminance	0.0116 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170D57 #4D570D

analogous

#0D2857 #170D57 #3C0D57

triadic

#170D57 #57170D #0D5717

tetradic

#170D57 #570D28 #4D570D #0D573C

square

#170D57 #570D28 #4D570D #0D573C

split-complementary

#170D57 #573C0D #28570D

monochromatic

#07041B #090522 #170D57 #25158C #331DC1

Accessibility & contrast

On white

17.05

#170D57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#170D57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170D57

17.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170D57	#FFFFFF	#000000	##FFFFFF
##170D57	1.00	17.05	1.23	17.05
#FFFFFF	17.05	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F59

Deuteranopia (green-blind)

#001956

Tritanopia (blue-blind)

#002332

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #170d57;
/* rgb */ color: rgb(23, 13, 87);
/* oklch */ color: oklch(23.9% 0.123 277.7);

Tailwind

colors: {
  custom: {
    50: '#604e87',
    500: '#170d57',
    950: '#000000',
  },
}

SCSS

$custom: #170d57;
$custom-light: #604e87;
$custom-dark: #000000;

JSON

{
  "hex": "#170d57",
  "rgb": {
    "r": 23,
    "g": 13,
    "b": 87
  },
  "hsl": {
    "h": 248.108,
    "s": 74,
    "l": 19.608
  },
  "oklch": {
    "l": 0.23942,
    "c": 0.12323,
    "h": 277.7
  },
  "luminance": 0.01158
}

Semantic roles & 50–950 ramp

primary

#170D57

secondary

#84922E

accent

#F137D8

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05010B

muted

#7A777C

Preview Lab

Preview with #170D57

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

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