#17308F#17308F

#17308F is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.1% C 0.159 H 266.4°. Best body text is #FFFFFF at 11.32:1 contrast (WCAG AA passes).

Color values

HEX	#17308F
RGB	rgb(23, 48, 143)
HSL	hsl(228, 72%, 33%)
HSV	hsv(228, 84%, 56%)
CMYK	cmyk(83.9%, 66.4%, 0%, 43.9%)
CIE-LAB	lab(24.57, 28.18, -54.87)
CIE-LCH	lch(24.57, 61.69, 297.18°)
OKLab	oklab(36.07% -0.01 -0.1589)
OKLCH	oklch(36.07% 0.159 266.4)
XYZ	xyz(6.3665, 4.2785, 26.4716)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17308F #8F7617

analogous

#176C8F #17308F #3A178F

triadic

#17308F #8F1730 #308F17

tetradic

#17308F #8F176C #8F7617 #178F3A

square

#17308F #8F176C #8F7617 #178F3A

split-complementary

#17308F #8F3A17 #6C8F17

monochromatic

#060D26 #0F1E5A #17308F #1F42C4 #4061E0

Accessibility & contrast

On white

11.32

#17308F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#17308F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17308F

11.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17308F	#FFFFFF	#000000	##FFFFFF
##17308F	1.00	11.32	1.86	11.32
#FFFFFF	11.32	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004092

Deuteranopia (green-blind)

#00358D

Tritanopia (blue-blind)

#00495B

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #17308f;
/* rgb */ color: rgb(23, 48, 143);
/* oklch */ color: oklch(36.1% 0.159 266.4);

Tailwind

colors: {
  custom: {
    50: '#6c68b1',
    500: '#17308f',
    950: '#000000',
  },
}

SCSS

$custom: #17308f;
$custom-light: #6c68b1;
$custom-dark: #000000;

JSON

{
  "hex": "#17308f",
  "rgb": {
    "r": 23,
    "g": 48,
    "b": 143
  },
  "hsl": {
    "h": 227.5,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.36069,
    "c": 0.15925,
    "h": 266.4
  },
  "luminance": 0.04279
}

Semantic roles & 50–950 ramp

primary

#17308F

secondary

#C1A641

accent

#C939EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #17308F

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

Preview Lab → · Contrast checker → · Palette generator →