#3727B1#3727B1

#3727B1 is a dark, highly saturated blue. Relative luminance 0.054; OKLCH L 40.0% C 0.204 H 277.1°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#3727B1
RGB	rgb(55, 39, 177)
HSL	hsl(247, 64%, 42%)
HSV	hsv(247, 78%, 69%)
CMYK	cmyk(68.9%, 78%, 0%, 30.6%)
CIE-LAB	lab(27.94, 48.46, -69.93)
CIE-LCH	lch(27.94, 85.08, 304.72°)
OKLab	oklab(40.02% 0.0252 -0.2021)
OKLCH	oklch(40.02% 0.204 277.1)
XYZ	xyz(10.2343, 5.4367, 42.0965)
Luminance	0.0544 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3727B1 #A1B127

analogous

#275CB1 #3727B1 #7C27B1

triadic

#3727B1 #B13727 #27B137

tetradic

#3727B1 #B1275C #A1B127 #27B17C

square

#3727B1 #B1275C #A1B127 #27B17C

split-complementary

#3727B1 #B17C27 #5CB127

monochromatic

#18114D #271C7F #3727B1 #5140D5 #7F72E0

Accessibility & contrast

On white

10.06

#3727B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#3727B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3727B1

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3727B1	#FFFFFF	#000000	##FFFFFF
##3727B1	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048B5

Deuteranopia (green-blind)

#003CAF

Tritanopia (blue-blind)

#00506B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3727b1;
/* rgb */ color: rgb(55, 39, 177);
/* oklch */ color: oklch(40.0% 0.204 277.1);

Tailwind

colors: {
  custom: {
    50: '#8065ca',
    500: '#3727b1',
    950: '#000000',
  },
}

SCSS

$custom: #3727b1;
$custom-light: #8065ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3727b1",
  "rgb": {
    "r": 55,
    "g": 39,
    "b": 177
  },
  "hsl": {
    "h": 246.957,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.40016,
    "c": 0.20366,
    "h": 277.1
  },
  "luminance": 0.05438
}

Semantic roles & 50–950 ramp

primary

#3727B1

secondary

#BDC76D

accent

#E741D4

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0613

muted

#7D7A82

Preview Lab

Preview with #3727B1

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

Preview Lab → · Contrast checker → · Palette generator →