#17307B#17307B

#17307B is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.1% C 0.131 H 265.6°. Best body text is #FFFFFF at 12.03:1 contrast (WCAG AA passes).

Color values

HEX	#17307B
RGB	rgb(23, 48, 123)
HSL	hsl(225, 68%, 29%)
HSV	hsv(225, 81%, 48%)
CMYK	cmyk(81.3%, 61%, 0%, 51.8%)
CIE-LAB	lab(22.74, 20.16, -45.34)
CIE-LCH	lch(22.74, 49.62, 293.97°)
OKLab	oklab(34.15% -0.01 -0.131)
OKLCH	oklch(34.15% 0.131 265.6)
XYZ	xyz(4.9842, 3.7255, 19.1915)
Luminance	0.0373 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17307B #7B6217

analogous

#17627B #17307B #30177B

triadic

#17307B #7B1730 #307B17

tetradic

#17307B #7B1762 #7B6217 #177B30

square

#17307B #7B1762 #7B6217 #177B30

split-complementary

#17307B #7B3017 #627B17

monochromatic

#050A1A #0D1C47 #17307B #2144AF #335DD9

Accessibility & contrast

On white

12.03

#17307B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#17307B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17307B

12.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17307B	#FFFFFF	#000000	##FFFFFF
##17307B	1.00	12.03	1.75	12.03
#FFFFFF	12.03	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B7E

Deuteranopia (green-blind)

#00327A

Tritanopia (blue-blind)

#004350

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #17307b;
/* rgb */ color: rgb(23, 48, 123);
/* oklch */ color: oklch(34.1% 0.131 265.6);

Tailwind

colors: {
  custom: {
    50: '#6667a2',
    500: '#17307b',
    950: '#000000',
  },
}

SCSS

$custom: #17307b;
$custom-light: #6667a2;
$custom-dark: #000000;

JSON

{
  "hex": "#17307b",
  "rgb": {
    "r": 23,
    "g": 48,
    "b": 123
  },
  "hsl": {
    "h": 225,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.34148,
    "c": 0.13137,
    "h": 265.6
  },
  "luminance": 0.03726
}

Semantic roles & 50–950 ramp

primary

#17307B

secondary

#B0933E

accent

#C03CEB

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #17307B

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

Preview Lab → · Contrast checker → · Palette generator →