#170D58#170D58

#170D58 is a very dark, vivid blue. Relative luminance 0.012; OKLCH L 24.1% C 0.125 H 277.5°. Best body text is #FFFFFF at 17.00:1 contrast (WCAG AA passes).

Color values

HEX	#170D58
RGB	rgb(23, 13, 88)
HSL	hsl(248, 74%, 20%)
HSV	hsv(248, 85%, 35%)
CMYK	cmyk(73.9%, 85.2%, 0%, 65.5%)
CIE-LAB	lab(10.37, 30.09, -42.74)
CIE-LCH	lch(10.37, 52.27, 305.15°)
OKLab	oklab(24.07% 0.0162 -0.1235)
OKLCH	oklch(24.07% 0.125 277.5)
XYZ	xyz(2.2582, 1.1744, 9.3383)
Luminance	0.0118 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170D58 #4E580D

analogous

#0D2958 #170D58 #3D0D58

triadic

#170D58 #58170D #0D5817

tetradic

#170D58 #580D29 #4E580D #0D583D

square

#170D58 #580D29 #4E580D #0D583D

split-complementary

#170D58 #583D0D #29580D

monochromatic

#07041B #090523 #170D58 #25158D #331DC3

Accessibility & contrast

On white

17.00

#170D58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#170D58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170D58

17.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170D58	#FFFFFF	#000000	##FFFFFF
##170D58	1.00	17.00	1.23	17.00
#FFFFFF	17.00	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F5A

Deuteranopia (green-blind)

#001957

Tritanopia (blue-blind)

#002432

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #170d58;
/* rgb */ color: rgb(23, 13, 88);
/* oklch */ color: oklch(24.1% 0.125 277.5);

Tailwind

colors: {
  custom: {
    50: '#604e88',
    500: '#170d58',
    950: '#000000',
  },
}

SCSS

$custom: #170d58;
$custom-light: #604e88;
$custom-dark: #000000;

JSON

{
  "hex": "#170d58",
  "rgb": {
    "r": 23,
    "g": 13,
    "b": 88
  },
  "hsl": {
    "h": 248,
    "s": 74.257,
    "l": 19.804
  },
  "oklch": {
    "l": 0.24065,
    "c": 0.12455,
    "h": 277.5
  },
  "luminance": 0.01175
}

Semantic roles & 50–950 ramp

primary

#170D58

secondary

#85932E

accent

#F137D8

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#05010B

muted

#7A777C

Preview Lab

Preview with #170D58

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

Preview Lab → · Contrast checker → · Palette generator →