#3937B7#3937B7

#3937B7 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 43.0% C 0.195 H 275.2°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#3937B7
RGB	rgb(57, 55, 183)
HSL	hsl(241, 54%, 47%)
HSV	hsv(241, 70%, 72%)
CMYK	cmyk(68.9%, 69.9%, 0%, 28.2%)
CIE-LAB	lab(31.85, 41.74, -67.06)
CIE-LCH	lch(31.85, 78.99, 301.90°)
OKLab	oklab(43.01% 0.0175 -0.1938)
OKLCH	oklch(43.01% 0.195 275.2)
XYZ	xyz(11.5980, 7.0201, 45.5344)
Luminance	0.0702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3937B7 #B5B737

analogous

#3775B7 #3937B7 #7937B7

triadic

#3937B7 #B73937 #37B739

tetradic

#3937B7 #B73775 #B5B737 #37B779

square

#3937B7 #B73775 #B5B737 #37B779

split-complementary

#3937B7 #B77937 #75B737

monochromatic

#1C1B59 #2A2988 #3937B7 #5F5DCE #8D8CDC

Accessibility & contrast

On white

8.73

#3937B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3937B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937B7

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937B7	#FFFFFF	#000000	##FFFFFF
##3937B7	1.00	8.73	2.40	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BB

Deuteranopia (green-blind)

#0045B5

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3937b7;
/* rgb */ color: rgb(57, 55, 183);
/* oklch */ color: oklch(43.0% 0.195 275.2);

Tailwind

colors: {
  custom: {
    50: '#816fce',
    500: '#3937b7',
    950: '#000000',
  },
}

SCSS

$custom: #3937b7;
$custom-light: #816fce;
$custom-dark: #000000;

JSON

{
  "hex": "#3937b7",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 183
  },
  "hsl": {
    "h": 240.938,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43007,
    "c": 0.19455,
    "h": 275.2
  },
  "luminance": 0.07021
}

Semantic roles & 50–950 ramp

primary

#3937B7

secondary

#C6C783

accent

#DD4BDB

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3937B7

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

Preview Lab → · Contrast checker → · Palette generator →