#3721AA#3721AA

#3721AA is a dark, highly saturated blue. Relative luminance 0.048; OKLCH L 38.5% C 0.201 H 278.6°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#3721AA
RGB	rgb(55, 33, 170)
HSL	hsl(250, 67%, 40%)
HSV	hsv(250, 81%, 67%)
CMYK	cmyk(67.6%, 80.6%, 0%, 33.3%)
CIE-LAB	lab(26.16, 49.27, -68.68)
CIE-LCH	lch(26.16, 84.53, 305.66°)
OKLab	oklab(38.55% 0.0301 -0.1984)
OKLCH	oklch(38.55% 0.201 278.6)
XYZ	xyz(9.3728, 4.8014, 38.4553)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3721AA #94AA21

analogous

#2150AA #3721AA #7C21AA

triadic

#3721AA #AA3721 #21AA37

tetradic

#3721AA #AA2150 #94AA21 #21AA7C

square

#3721AA #AA2150 #94AA21 #21AA7C

split-complementary

#3721AA #AA7C21 #50AA21

monochromatic

#160D43 #261777 #3721AA #4C31D7 #7864E1

Accessibility & contrast

On white

10.71

#3721AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#3721AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3721AA

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3721AA	#FFFFFF	#000000	##FFFFFF
##3721AA	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043AE

Deuteranopia (green-blind)

#0038A8

Tritanopia (blue-blind)

#004B66

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #3721aa;
/* rgb */ color: rgb(55, 33, 170);
/* oklch */ color: oklch(38.5% 0.201 278.6);

Tailwind

colors: {
  custom: {
    50: '#7f61c5',
    500: '#3721aa',
    950: '#000000',
  },
}

SCSS

$custom: #3721aa;
$custom-light: #7f61c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3721aa",
  "rgb": {
    "r": 55,
    "g": 33,
    "b": 170
  },
  "hsl": {
    "h": 249.635,
    "s": 67.488,
    "l": 39.804
  },
  "oklch": {
    "l": 0.38548,
    "c": 0.20064,
    "h": 278.6
  },
  "luminance": 0.04802
}

Semantic roles & 50–950 ramp

primary

#3721AA

secondary

#B6C661

accent

#EA3DCF

background

#F8F5FC

surface

#F0EAF8

border

#CBC6D1

text

#0C0513

muted

#7D7982

Preview Lab

Preview with #3721AA

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

Preview Lab → · Contrast checker → · Palette generator →