#17257B#17257B

#17257B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.0% C 0.145 H 268.8°. Best body text is #FFFFFF at 13.23:1 contrast (WCAG AA passes).

Color values

HEX	#17257B
RGB	rgb(23, 37, 123)
HSL	hsl(232, 68%, 29%)
HSV	hsv(232, 81%, 48%)
CMYK	cmyk(81.3%, 69.9%, 0%, 51.8%)
CIE-LAB	lab(19.78, 27.84, -50.19)
CIE-LCH	lch(19.78, 57.39, 299.01°)
OKLab	oklab(31.96% -0.0031 -0.1453)
OKLCH	oklch(31.96% 0.145 268.8)
XYZ	xyz(4.5888, 2.9348, 19.0597)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17257B #7B6D17

analogous

#17577B #17257B #3B177B

triadic

#17257B #7B1725 #257B17

tetradic

#17257B #7B1757 #7B6D17 #177B3B

square

#17257B #7B1757 #7B6D17 #177B3B

split-complementary

#17257B #7B3B17 #577B17

monochromatic

#05081A #0D1547 #17257B #2135AF #334BD9

Accessibility & contrast

On white

13.23

#17257B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#17257B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17257B

13.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17257B	#FFFFFF	#000000	##FFFFFF
##17257B	1.00	13.23	1.59	13.23
#FFFFFF	13.23	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00357E

Deuteranopia (green-blind)

#002B79

Tritanopia (blue-blind)

#003C4C

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #17257b;
/* rgb */ color: rgb(23, 37, 123);
/* oklch */ color: oklch(32.0% 0.145 268.8);

Tailwind

colors: {
  custom: {
    50: '#675fa2',
    500: '#17257b',
    950: '#000000',
  },
}

SCSS

$custom: #17257b;
$custom-light: #675fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#17257b",
  "rgb": {
    "r": 23,
    "g": 37,
    "b": 123
  },
  "hsl": {
    "h": 231.6,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.31961,
    "c": 0.14534,
    "h": 268.8
  },
  "luminance": 0.02935
}

Semantic roles & 50–950 ramp

primary

#17257B

secondary

#B0A03E

accent

#D33CEB

background

#F6F5FA

surface

#EBE9F4

border

#C6C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #17257B

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

Preview Lab → · Contrast checker → · Palette generator →