#17387F#17387F

#17387F is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.127 H 262.9°. Best body text is #FFFFFF at 11.00:1 contrast (WCAG AA passes).

Color values

HEX	#17387F
RGB	rgb(23, 56, 127)
HSL	hsl(221, 69%, 29%)
HSV	hsv(221, 82%, 50%)
CMYK	cmyk(81.9%, 55.9%, 0%, 50.2%)
CIE-LAB	lab(25.39, 16.13, -43.56)
CIE-LCH	lch(25.39, 46.45, 290.31°)
OKLab	oklab(36.24% -0.0156 -0.1256)
OKLCH	oklch(36.24% 0.127 262.9)
XYZ	xyz(5.5969, 4.5422, 20.6563)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17387F #7F5E17

analogous

#176C7F #17387F #2A177F

triadic

#17387F #7F1738 #387F17

tetradic

#17387F #7F176C #7F5E17 #177F2A

square

#17387F #7F176C #7F5E17 #177F2A

split-complementary

#17387F #7F2A17 #6C7F17

monochromatic

#050B1A #0E214B #17387F #204FB3 #366ADB

Accessibility & contrast

On white

11.00

#17387F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#17387F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17387F

11.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17387F	#FFFFFF	#000000	##FFFFFF
##17387F	1.00	11.00	1.91	11.00
#FFFFFF	11.00	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004181

Deuteranopia (green-blind)

#00387E

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #17387f;
/* rgb */ color: rgb(23, 56, 127);
/* oklch */ color: oklch(36.2% 0.127 262.9);

Tailwind

colors: {
  custom: {
    50: '#666ea5',
    500: '#17387f',
    950: '#000000',
  },
}

SCSS

$custom: #17387f;
$custom-light: #666ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#17387f",
  "rgb": {
    "r": 23,
    "g": 56,
    "b": 127
  },
  "hsl": {
    "h": 220.962,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.36245,
    "c": 0.12659,
    "h": 262.9
  },
  "luminance": 0.04543
}

Semantic roles & 50–950 ramp

primary

#17387F

secondary

#B48E3E

accent

#B43CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #17387F

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

Preview Lab → · Contrast checker → · Palette generator →