#17388D#17388D

#17388D is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.146 H 264.3°. Best body text is #FFFFFF at 10.57:1 contrast (WCAG AA passes).

Color values

HEX	#17388D
RGB	rgb(23, 56, 141)
HSL	hsl(223, 72%, 32%)
HSV	hsv(223, 84%, 55%)
CMYK	cmyk(83.7%, 60.3%, 0%, 44.7%)
CIE-LAB	lab(26.54, 21.86, -50.41)
CIE-LCH	lch(26.54, 54.95, 293.45°)
OKLab	oklab(37.48% -0.0146 -0.1457)
OKLCH	oklch(37.48% 0.146 264.3)
XYZ	xyz(6.5735, 4.9328, 25.7998)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17388D #8D6C17

analogous

#17738D #17388D #31178D

triadic

#17388D #8D1738 #388D17

tetradic

#17388D #8D1773 #8D6C17 #178D31

square

#17388D #8D1773 #8D6C17 #178D31

split-complementary

#17388D #8D3117 #738D17

monochromatic

#060E24 #0E2358 #17388D #204DC2 #3F6CE0

Accessibility & contrast

On white

10.57

#17388D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#17388D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17388D

10.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17388D	#FFFFFF	#000000	##FFFFFF
##17388D	1.00	10.57	1.99	10.57
#FFFFFF	10.57	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004490

Deuteranopia (green-blind)

#003A8B

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #17388d;
/* rgb */ color: rgb(23, 56, 141);
/* oklch */ color: oklch(37.5% 0.146 264.3);

Tailwind

colors: {
  custom: {
    50: '#6a6eaf',
    500: '#17388d',
    950: '#000000',
  },
}

SCSS

$custom: #17388d;
$custom-light: #6a6eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#17388d",
  "rgb": {
    "r": 23,
    "g": 56,
    "b": 141
  },
  "hsl": {
    "h": 223.22,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.37476,
    "c": 0.14648,
    "h": 264.3
  },
  "luminance": 0.04934
}

Semantic roles & 50–950 ramp

primary

#17388D

secondary

#C09C40

accent

#BC39EF

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #17388D

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

Preview Lab → · Contrast checker → · Palette generator →