#3721AC#3721AC

#3721AC is a dark, highly saturated blue. Relative luminance 0.049; OKLCH L 38.8% C 0.203 H 278.4°. Best body text is #FFFFFF at 10.63:1 contrast (WCAG AA passes).

Color values

HEX	#3721AC
RGB	rgb(55, 33, 172)
HSL	hsl(249, 68%, 40%)
HSV	hsv(249, 81%, 67%)
CMYK	cmyk(68%, 80.8%, 0%, 32.5%)
CIE-LAB	lab(26.38, 49.87, -69.52)
CIE-LCH	lch(26.38, 85.55, 305.65°)
OKLab	oklab(38.77% 0.0295 -0.2008)
OKLCH	oklch(38.77% 0.203 278.4)
XYZ	xyz(9.5634, 4.8777, 39.4592)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3721AC #96AC21

analogous

#2151AC #3721AC #7C21AC

triadic

#3721AC #AC3721 #21AC37

tetradic

#3721AC #AC2151 #96AC21 #21AC7C

square

#3721AC #AC2151 #96AC21 #21AC7C

split-complementary

#3721AC #AC7C21 #51AC21

monochromatic

#160D45 #271779 #3721AC #4D32D8 #7966E2

Accessibility & contrast

On white

10.63

#3721AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#3721AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3721AC

10.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3721AC	#FFFFFF	#000000	##FFFFFF
##3721AC	1.00	10.63	1.98	10.63
#FFFFFF	10.63	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B0

Deuteranopia (green-blind)

#0039AA

Tritanopia (blue-blind)

#004C67

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #3721ac;
/* rgb */ color: rgb(55, 33, 172);
/* oklch */ color: oklch(38.8% 0.203 278.4);

Tailwind

colors: {
  custom: {
    50: '#7f61c6',
    500: '#3721ac',
    950: '#000000',
  },
}

SCSS

$custom: #3721ac;
$custom-light: #7f61c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3721ac",
  "rgb": {
    "r": 55,
    "g": 33,
    "b": 172
  },
  "hsl": {
    "h": 249.496,
    "s": 67.805,
    "l": 40.196
  },
  "oklch": {
    "l": 0.38768,
    "c": 0.20295,
    "h": 278.4
  },
  "luminance": 0.04878
}

Semantic roles & 50–950 ramp

primary

#3721AC

secondary

#B7C762

accent

#EB3DCF

background

#F8F5FC

surface

#F0EAF8

border

#CBC6D1

text

#0C0513

muted

#7D7982

Preview Lab

Preview with #3721AC

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

Preview Lab → · Contrast checker → · Palette generator →