#17377D#17377D

#17377D is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.125 H 263.1°. Best body text is #FFFFFF at 11.18:1 contrast (WCAG AA passes).

Color values

HEX	#17377D
RGB	rgb(23, 55, 125)
HSL	hsl(221, 69%, 29%)
HSV	hsv(221, 82%, 49%)
CMYK	cmyk(81.6%, 56%, 0%, 51%)
CIE-LAB	lab(24.94, 16.01, -43.04)
CIE-LCH	lch(24.94, 45.92, 290.40°)
OKLab	oklab(35.85% -0.015 -0.1241)
OKLCH	oklch(35.85% 0.125 263.1)
XYZ	xyz(5.4199, 4.3946, 19.9606)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17377D #7D5D17

analogous

#176A7D #17377D #2A177D

triadic

#17377D #7D1737 #377D17

tetradic

#17377D #7D176A #7D5D17 #177D2A

square

#17377D #7D176A #7D5D17 #177D2A

split-complementary

#17377D #7D2A17 #6A7D17

monochromatic

#050B1A #0D2049 #17377D #214EB1 #3568DA

Accessibility & contrast

On white

11.18

#17377D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#17377D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17377D

11.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17377D	#FFFFFF	#000000	##FFFFFF
##17377D	1.00	11.18	1.88	11.18
#FFFFFF	11.18	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00407F

Deuteranopia (green-blind)

#00377C

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #17377d;
/* rgb */ color: rgb(23, 55, 125);
/* oklch */ color: oklch(35.9% 0.125 263.1);

Tailwind

colors: {
  custom: {
    50: '#666da3',
    500: '#17377d',
    950: '#000000',
  },
}

SCSS

$custom: #17377d;
$custom-light: #666da3;
$custom-dark: #000000;

JSON

{
  "hex": "#17377d",
  "rgb": {
    "r": 23,
    "g": 55,
    "b": 125
  },
  "hsl": {
    "h": 221.176,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.35851,
    "c": 0.12501,
    "h": 263.1
  },
  "luminance": 0.04395
}

Semantic roles & 50–950 ramp

primary

#17377D

secondary

#B28D3E

accent

#B53CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17377D

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

Preview Lab → · Contrast checker → · Palette generator →