#17387D#17387D

#17387D is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.1% C 0.124 H 262.7°. Best body text is #FFFFFF at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#17387D
RGB	rgb(23, 56, 125)
HSL	hsl(221, 69%, 29%)
HSV	hsv(221, 82%, 49%)
CMYK	cmyk(81.6%, 55.2%, 0%, 51%)
CIE-LAB	lab(25.23, 15.30, -42.56)
CIE-LCH	lch(25.23, 45.22, 289.77°)
OKLab	oklab(36.08% -0.0158 -0.1227)
OKLCH	oklch(36.08% 0.124 262.7)
XYZ	xyz(5.4679, 4.4905, 19.9766)
Luminance	0.0449 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17387D #7D5C17

analogous

#176B7D #17387D #29177D

triadic

#17387D #7D1738 #387D17

tetradic

#17387D #7D176B #7D5C17 #177D29

square

#17387D #7D176B #7D5C17 #177D29

split-complementary

#17387D #7D2917 #6B7D17

monochromatic

#050C1A #0D2149 #17387D #214FB1 #356ADA

Accessibility & contrast

On white

11.06

#17387D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#17387D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17387D

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17387D	#FFFFFF	#000000	##FFFFFF
##17387D	1.00	11.06	1.90	11.06
#FFFFFF	11.06	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03417F

Deuteranopia (green-blind)

#00377C

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #17387d;
/* rgb */ color: rgb(23, 56, 125);
/* oklch */ color: oklch(36.1% 0.124 262.7);

Tailwind

colors: {
  custom: {
    50: '#666ea3',
    500: '#17387d',
    950: '#000000',
  },
}

SCSS

$custom: #17387d;
$custom-light: #666ea3;
$custom-dark: #000000;

JSON

{
  "hex": "#17387d",
  "rgb": {
    "r": 23,
    "g": 56,
    "b": 125
  },
  "hsl": {
    "h": 220.588,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36076,
    "c": 0.12369,
    "h": 262.7
  },
  "luminance": 0.04491
}

Semantic roles & 50–950 ramp

primary

#17387D

secondary

#B28C3E

accent

#B33CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17387D

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

Preview Lab → · Contrast checker → · Palette generator →