#17387E#17387E

#17387E is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.125 H 262.8°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#17387E
RGB	rgb(23, 56, 126)
HSL	hsl(221, 69%, 29%)
HSV	hsv(221, 82%, 49%)
CMYK	cmyk(81.7%, 55.6%, 0%, 50.6%)
CIE-LAB	lab(25.31, 15.71, -43.06)
CIE-LCH	lch(25.31, 45.84, 290.05°)
OKLab	oklab(36.16% -0.0157 -0.1241)
OKLCH	oklch(36.16% 0.125 262.8)
XYZ	xyz(5.5321, 4.5162, 20.3148)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17387E #7E5D17

analogous

#176C7E #17387E #2A177E

triadic

#17387E #7E1738 #387E17

tetradic

#17387E #7E176C #7E5D17 #177E2A

square

#17387E #7E176C #7E5D17 #177E2A

split-complementary

#17387E #7E2A17 #6C7E17

monochromatic

#050C1A #0E214A #17387E #204FB2 #356ADA

Accessibility & contrast

On white

11.03

#17387E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#17387E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17387E

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17387E	#FFFFFF	#000000	##FFFFFF
##17387E	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#014180

Deuteranopia (green-blind)

#00387D

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #17387e;
/* rgb */ color: rgb(23, 56, 126);
/* oklch */ color: oklch(36.2% 0.125 262.8);

Tailwind

colors: {
  custom: {
    50: '#666ea4',
    500: '#17387e',
    950: '#000000',
  },
}

SCSS

$custom: #17387e;
$custom-light: #666ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#17387e",
  "rgb": {
    "r": 23,
    "g": 56,
    "b": 126
  },
  "hsl": {
    "h": 220.777,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.3616,
    "c": 0.12514,
    "h": 262.8
  },
  "luminance": 0.04517
}

Semantic roles & 50–950 ramp

primary

#17387E

secondary

#B38D3E

accent

#B43CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17387E

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

Preview Lab → · Contrast checker → · Palette generator →