#173983#173983

#173983 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.8% C 0.131 H 263.0°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#173983
RGB	rgb(23, 57, 131)
HSL	hsl(221, 70%, 30%)
HSV	hsv(221, 82%, 51%)
CMYK	cmyk(82.4%, 56.5%, 0%, 48.6%)
CIE-LAB	lab(26.00, 17.07, -45.08)
CIE-LCH	lch(26.00, 48.20, 290.74°)
OKLab	oklab(36.81% -0.016 -0.13)
OKLCH	oklch(36.81% 0.131 263)
XYZ	xyz(5.9117, 4.7464, 22.0729)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173983 #836117

analogous

#176F83 #173983 #2B1783

triadic

#173983 #831739 #398317

tetradic

#173983 #83176F #836117 #17832B

square

#173983 #83176F #836117 #17832B

split-complementary

#173983 #832B17 #6F8317

monochromatic

#050C1B #0E224F #173983 #2050B7 #386CDC

Accessibility & contrast

On white

10.77

#173983 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#173983 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173983

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173983	#FFFFFF	#000000	##FFFFFF
##173983	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004386

Deuteranopia (green-blind)

#003982

Tritanopia (blue-blind)

#004B58

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173983;
/* rgb */ color: rgb(23, 57, 131);
/* oklch */ color: oklch(36.8% 0.131 263.0);

Tailwind

colors: {
  custom: {
    50: '#676ea8',
    500: '#173983',
    950: '#000000',
  },
}

SCSS

$custom: #173983;
$custom-light: #676ea8;
$custom-dark: #000000;

JSON

{
  "hex": "#173983",
  "rgb": {
    "r": 23,
    "g": 57,
    "b": 131
  },
  "hsl": {
    "h": 221.111,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.36808,
    "c": 0.13103,
    "h": 263
  },
  "luminance": 0.04747
}

Semantic roles & 50–950 ramp

primary

#173983

secondary

#B7913F

accent

#B53BED

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #173983

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

Preview Lab → · Contrast checker → · Palette generator →