#17378F#17378F

#17378F is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.151 H 264.7°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#17378F
RGB	rgb(23, 55, 143)
HSL	hsl(224, 72%, 33%)
HSV	hsv(224, 84%, 56%)
CMYK	cmyk(83.9%, 61.5%, 0%, 43.9%)
CIE-LAB	lab(26.44, 23.37, -51.82)
CIE-LCH	lch(26.44, 56.84, 294.27°)
OKLab	oklab(37.45% -0.014 -0.1499)
OKLCH	oklch(37.45% 0.151 264.7)
XYZ	xyz(6.6757, 4.8969, 26.5746)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17378F #8F6F17

analogous

#17738F #17378F #33178F

triadic

#17378F #8F1737 #378F17

tetradic

#17378F #8F1773 #8F6F17 #178F33

square

#17378F #8F1773 #8F6F17 #178F33

split-complementary

#17378F #8F3317 #738F17

monochromatic

#060E26 #0F235A #17378F #1F4BC4 #406BE0

Accessibility & contrast

On white

10.61

#17378F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#17378F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17378F

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17378F	#FFFFFF	#000000	##FFFFFF
##17378F	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004492

Deuteranopia (green-blind)

#00398D

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #17378f;
/* rgb */ color: rgb(23, 55, 143);
/* oklch */ color: oklch(37.5% 0.151 264.7);

Tailwind

colors: {
  custom: {
    50: '#6b6db1',
    500: '#17378f',
    950: '#000000',
  },
}

SCSS

$custom: #17378f;
$custom-light: #6b6db1;
$custom-dark: #000000;

JSON

{
  "hex": "#17378f",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 143
  },
  "hsl": {
    "h": 224,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37453,
    "c": 0.15054,
    "h": 264.7
  },
  "luminance": 0.04898
}

Semantic roles & 50–950 ramp

primary

#17378F

secondary

#C19F41

accent

#BE39EF

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #17378F

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

Preview Lab → · Contrast checker → · Palette generator →