#170F58#170F58

#170F58 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.3% C 0.123 H 277.1°. Best body text is #FFFFFF at 16.86:1 contrast (WCAG AA passes).

Color values

HEX	#170F58
RGB	rgb(23, 15, 88)
HSL	hsl(247, 71%, 20%)
HSV	hsv(247, 83%, 35%)
CMYK	cmyk(73.9%, 83%, 0%, 65.5%)
CIE-LAB	lab(10.76, 28.95, -42.08)
CIE-LCH	lch(10.76, 51.08, 304.52°)
OKLab	oklab(24.34% 0.0151 -0.1216)
OKLCH	oklch(24.34% 0.123 277.1)
XYZ	xyz(2.2851, 1.2282, 9.3473)
Luminance	0.0123 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F58 #50580F

analogous

#0F2C58 #170F58 #3B0F58

triadic

#170F58 #58170F #0F5817

tetradic

#170F58 #580F2C #50580F #0F583B

square

#170F58 #580F2C #50580F #0F583B

split-complementary

#170F58 #583B0F #2C580F

monochromatic

#07041A #090624 #170F58 #25188C #3221C1

Accessibility & contrast

On white

16.86

#170F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#170F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F58

16.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F58	#FFFFFF	#000000	##FFFFFF
##170F58	1.00	16.86	1.25	16.86
#FFFFFF	16.86	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00205A

Deuteranopia (green-blind)

#001A57

Tritanopia (blue-blind)

#002533

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #170f58;
/* rgb */ color: rgb(23, 15, 88);
/* oklch */ color: oklch(24.3% 0.123 277.1);

Tailwind

colors: {
  custom: {
    50: '#604f88',
    500: '#170f58',
    950: '#000000',
  },
}

SCSS

$custom: #170f58;
$custom-light: #604f88;
$custom-dark: #000000;

JSON

{
  "hex": "#170f58",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 88
  },
  "hsl": {
    "h": 246.575,
    "s": 70.874,
    "l": 20.196
  },
  "oklch": {
    "l": 0.24342,
    "c": 0.12255,
    "h": 277.1
  },
  "luminance": 0.01228
}

Semantic roles & 50–950 ramp

primary

#170F58

secondary

#879231

accent

#EE3ADA

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05020B

muted

#7A787C

Preview Lab

Preview with #170F58

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

Preview Lab → · Contrast checker → · Palette generator →