#17305B#17305B

#17305B is a dark, moderate blue. Relative luminance 0.031; OKLCH L 31.5% C 0.083 H 260.5°. Best body text is #FFFFFF at 13.04:1 contrast (WCAG AA passes).

Color values

HEX	#17305B
RGB	rgb(23, 48, 91)
HSL	hsl(218, 60%, 22%)
HSV	hsv(218, 75%, 36%)
CMYK	cmyk(74.7%, 47.3%, 0%, 64.3%)
CIE-LAB	lab(20.25, 6.84, -28.66)
CIE-LCH	lch(20.25, 29.47, 283.43°)
OKLab	oklab(31.46% -0.0137 -0.082)
OKLCH	oklch(31.46% 0.083 260.5)
XYZ	xyz(3.2980, 3.0511, 10.3106)
Luminance	0.0305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17305B #5B4217

analogous

#17525B #17305B #20175B

triadic

#17305B #5B1730 #305B17

tetradic

#17305B #5B1752 #5B4217 #175B20

square

#17305B #5B1752 #5B4217 #175B20

split-complementary

#17305B #5B2017 #525B17

monochromatic

#060D18 #0B162A #17305B #234A8C #3064BD

Accessibility & contrast

On white

13.04

#17305B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#17305B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17305B

13.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17305B	#FFFFFF	#000000	##FFFFFF
##17305B	1.00	13.04	1.61	13.04
#FFFFFF	13.04	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B345D

Deuteranopia (green-blind)

#0F2E5A

Tritanopia (blue-blind)

#003A41

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #17305b;
/* rgb */ color: rgb(23, 48, 91);
/* oklch */ color: oklch(31.5% 0.083 260.5);

Tailwind

colors: {
  custom: {
    50: '#5e678a',
    500: '#17305b',
    950: '#000000',
  },
}

SCSS

$custom: #17305b;
$custom-light: #5e678a;
$custom-dark: #000000;

JSON

{
  "hex": "#17305b",
  "rgb": {
    "r": 23,
    "g": 48,
    "b": 91
  },
  "hsl": {
    "h": 217.941,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.31462,
    "c": 0.0831,
    "h": 260.5
  },
  "luminance": 0.03051
}

Semantic roles & 50–950 ramp

primary

#17305B

secondary

#92723C

accent

#A945E3

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#05060B

muted

#797A7C

Preview Lab

Preview with #17305B

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

Preview Lab → · Contrast checker → · Palette generator →