#17287B#17287B

#17287B is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.5% C 0.142 H 268.1°. Best body text is #FFFFFF at 12.92:1 contrast (WCAG AA passes).

Color values

HEX	#17287B
RGB	rgb(23, 40, 123)
HSL	hsl(230, 68%, 29%)
HSV	hsv(230, 81%, 48%)
CMYK	cmyk(81.3%, 67.5%, 0%, 51.8%)
CIE-LAB	lab(20.55, 25.78, -48.92)
CIE-LCH	lch(20.55, 55.29, 297.79°)
OKLab	oklab(32.53% -0.0048 -0.1416)
OKLCH	oklch(32.53% 0.142 268.1)
XYZ	xyz(4.6861, 3.1293, 19.0921)
Luminance	0.0313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17287B #7B6A17

analogous

#175A7B #17287B #38177B

triadic

#17287B #7B1728 #287B17

tetradic

#17287B #7B175A #7B6A17 #177B38

square

#17287B #7B175A #7B6A17 #177B38

split-complementary

#17287B #7B3817 #5A7B17

monochromatic

#05081A #0D1747 #17287B #2139AF #3350D9

Accessibility & contrast

On white

12.92

#17287B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#17287B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17287B

12.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17287B	#FFFFFF	#000000	##FFFFFF
##17287B	1.00	12.92	1.63	12.92
#FFFFFF	12.92	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367E

Deuteranopia (green-blind)

#002D79

Tritanopia (blue-blind)

#003E4D

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #17287b;
/* rgb */ color: rgb(23, 40, 123);
/* oklch */ color: oklch(32.5% 0.142 268.1);

Tailwind

colors: {
  custom: {
    50: '#6761a2',
    500: '#17287b',
    950: '#000000',
  },
}

SCSS

$custom: #17287b;
$custom-light: #6761a2;
$custom-dark: #000000;

JSON

{
  "hex": "#17287b",
  "rgb": {
    "r": 23,
    "g": 40,
    "b": 123
  },
  "hsl": {
    "h": 229.8,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.32526,
    "c": 0.14166,
    "h": 268.1
  },
  "luminance": 0.0313
}

Semantic roles & 50–950 ramp

primary

#17287B

secondary

#B09D3E

accent

#CE3CEB

background

#F6F5FA

surface

#EBEAF4

border

#C6C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #17287B

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

Preview Lab → · Contrast checker → · Palette generator →