#3721AD#3721AD

#3721AD is a dark, highly saturated blue. Relative luminance 0.049; OKLCH L 38.9% C 0.204 H 278.2°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#3721AD
RGB	rgb(55, 33, 173)
HSL	hsl(249, 68%, 40%)
HSV	hsv(249, 81%, 68%)
CMYK	cmyk(68.2%, 80.9%, 0%, 32.2%)
CIE-LAB	lab(26.49, 50.17, -69.93)
CIE-LCH	lch(26.49, 86.07, 305.65°)
OKLab	oklab(38.88% 0.0292 -0.202)
OKLCH	oklch(38.88% 0.204 278.2)
XYZ	xyz(9.6598, 4.9162, 39.9669)
Luminance	0.0492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3721AD #97AD21

analogous

#2151AD #3721AD #7D21AD

triadic

#3721AD #AD3721 #21AD37

tetradic

#3721AD #AD2151 #97AD21 #21AD7D

square

#3721AD #AD2151 #97AD21 #21AD7D

split-complementary

#3721AD #AD7D21 #51AD21

monochromatic

#160D46 #27177A #3721AD #4D33D8 #7A66E2

Accessibility & contrast

On white

10.59

#3721AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#3721AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3721AD

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3721AD	#FFFFFF	#000000	##FFFFFF
##3721AD	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B1

Deuteranopia (green-blind)

#0039AB

Tritanopia (blue-blind)

#004C68

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3721ad;
/* rgb */ color: rgb(55, 33, 173);
/* oklch */ color: oklch(38.9% 0.204 278.2);

Tailwind

colors: {
  custom: {
    50: '#7f61c7',
    500: '#3721ad',
    950: '#000000',
  },
}

SCSS

$custom: #3721ad;
$custom-light: #7f61c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3721ad",
  "rgb": {
    "r": 55,
    "g": 33,
    "b": 173
  },
  "hsl": {
    "h": 249.429,
    "s": 67.961,
    "l": 40.392
  },
  "oklch": {
    "l": 0.38878,
    "c": 0.20411,
    "h": 278.2
  },
  "luminance": 0.04917
}

Semantic roles & 50–950 ramp

primary

#3721AD

secondary

#B8C762

accent

#EB3DD0

background

#F8F5FC

surface

#F0EAF8

border

#CBC6D1

text

#0C0513

muted

#7D7982

Preview Lab

Preview with #3721AD

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

Preview Lab → · Contrast checker → · Palette generator →