#17377C#17377C

#17377C is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.8% C 0.124 H 263.0°. Best body text is #FFFFFF at 11.21:1 contrast (WCAG AA passes).

Color values

HEX	#17377C
RGB	rgb(23, 55, 124)
HSL	hsl(221, 69%, 29%)
HSV	hsv(221, 81%, 49%)
CMYK	cmyk(81.5%, 55.6%, 0%, 51.4%)
CIE-LAB	lab(24.86, 15.59, -42.53)
CIE-LCH	lch(24.86, 45.30, 290.13°)
OKLab	oklab(35.77% -0.0151 -0.1226)
OKLCH	oklch(35.77% 0.124 263)
XYZ	xyz(5.3563, 4.3691, 19.6259)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17377C #7C5C17

analogous

#176A7C #17377C #2A177C

triadic

#17377C #7C1737 #377C17

tetradic

#17377C #7C176A #7C5C17 #177C2A

square

#17377C #7C176A #7C5C17 #177C2A

split-complementary

#17377C #7C2A17 #6A7C17

monochromatic

#050B1A #0D2048 #17377C #214EB0 #3468D9

Accessibility & contrast

On white

11.21

#17377C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#17377C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17377C

11.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17377C	#FFFFFF	#000000	##FFFFFF
##17377C	1.00	11.21	1.87	11.21
#FFFFFF	11.21	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01407E

Deuteranopia (green-blind)

#00377B

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #17377c;
/* rgb */ color: rgb(23, 55, 124);
/* oklch */ color: oklch(35.8% 0.124 263.0);

Tailwind

colors: {
  custom: {
    50: '#666da2',
    500: '#17377c',
    950: '#000000',
  },
}

SCSS

$custom: #17377c;
$custom-light: #666da2;
$custom-dark: #000000;

JSON

{
  "hex": "#17377c",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 124
  },
  "hsl": {
    "h": 220.99,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.35766,
    "c": 0.12355,
    "h": 263
  },
  "luminance": 0.0437
}

Semantic roles & 50–950 ramp

primary

#17377C

secondary

#B18C3E

accent

#B43CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17377C

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

Preview Lab → · Contrast checker → · Palette generator →