#3937A4#3937A4

#3937A4 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.2% C 0.170 H 276.7°. Best body text is #FFFFFF at 9.31:1 contrast (WCAG AA passes).

Color values

HEX	#3937A4
RGB	rgb(57, 55, 164)
HSL	hsl(241, 50%, 43%)
HSV	hsv(241, 66%, 64%)
CMYK	cmyk(65.2%, 66.5%, 0%, 35.7%)
CIE-LAB	lab(30.11, 35.32, -58.55)
CIE-LCH	lch(30.11, 68.38, 301.10°)
OKLab	oklab(41.22% 0.0199 -0.1689)
OKLCH	oklch(41.22% 0.17 276.7)
XYZ	xyz(9.7522, 6.2818, 35.8133)
Luminance	0.0628 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.18

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3937A4 #A2A437

analogous

#376BA4 #3937A4 #6F37A4

triadic

#3937A4 #A43937 #37A439

tetradic

#3937A4 #A4376B #A2A437 #37A46F

square

#3937A4 #A4376B #A2A437 #37A46F

split-complementary

#3937A4 #A46F37 #6BA437

monochromatic

#191848 #292876 #3937A4 #5553C5 #8281D5

Accessibility & contrast

On white

9.31

#3937A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#3937A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937A4

9.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937A4	#FFFFFF	#000000	##FFFFFF
##3937A4	1.00	9.31	2.26	9.31
#FFFFFF	9.31	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA7

Deuteranopia (green-blind)

#0042A2

Tritanopia (blue-blind)

#005368

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3937a4;
/* rgb */ color: rgb(57, 55, 164);
/* oklch */ color: oklch(41.2% 0.170 276.7);

Tailwind

colors: {
  custom: {
    50: '#7d6ec0',
    500: '#3937a4',
    950: '#000000',
  },
}

SCSS

$custom: #3937a4;
$custom-light: #7d6ec0;
$custom-dark: #000000;

JSON

{
  "hex": "#3937a4",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 164
  },
  "hsl": {
    "h": 241.101,
    "s": 49.772,
    "l": 42.941
  },
  "oklch": {
    "l": 0.41218,
    "c": 0.17003,
    "h": 276.7
  },
  "luminance": 0.06283
}

Semantic roles & 50–950 ramp

primary

#3937A4

secondary

#BDBE79

accent

#D94FD7

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #3937A4

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

Preview Lab → · Contrast checker → · Palette generator →