#17387C#17387C

#17387C is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.0% C 0.122 H 262.5°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#17387C
RGB	rgb(23, 56, 124)
HSL	hsl(220, 69%, 29%)
HSV	hsv(220, 81%, 49%)
CMYK	cmyk(81.5%, 54.8%, 0%, 51.4%)
CIE-LAB	lab(25.15, 14.88, -42.05)
CIE-LCH	lch(25.15, 44.61, 289.49°)
OKLab	oklab(35.99% -0.0159 -0.1212)
OKLCH	oklch(35.99% 0.122 262.5)
XYZ	xyz(5.4043, 4.4651, 19.6419)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17387C #7C5B17

analogous

#176B7C #17387C #29177C

triadic

#17387C #7C1738 #387C17

tetradic

#17387C #7C176B #7C5B17 #177C29

square

#17387C #7C176B #7C5B17 #177C29

split-complementary

#17387C #7C2917 #6B7C17

monochromatic

#050C1A #0D2148 #17387C #214FB0 #346AD9

Accessibility & contrast

On white

11.09

#17387C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#17387C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17387C

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17387C	#FFFFFF	#000000	##FFFFFF
##17387C	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#05417E

Deuteranopia (green-blind)

#00377B

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #17387c;
/* rgb */ color: rgb(23, 56, 124);
/* oklch */ color: oklch(36.0% 0.122 262.5);

Tailwind

colors: {
  custom: {
    50: '#666ea2',
    500: '#17387c',
    950: '#000000',
  },
}

SCSS

$custom: #17387c;
$custom-light: #666ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#17387c",
  "rgb": {
    "r": 23,
    "g": 56,
    "b": 124
  },
  "hsl": {
    "h": 220.396,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.35992,
    "c": 0.12223,
    "h": 262.5
  },
  "luminance": 0.04466
}

Semantic roles & 50–950 ramp

primary

#17387C

secondary

#B18B3E

accent

#B23CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17387C

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

Preview Lab → · Contrast checker → · Palette generator →