#3F37EA#3F37EA

#3F37EA is a mid, highly saturated blue. Relative luminance 0.097; OKLCH L 48.5% C 0.254 H 273.5°. Best body text is #FFFFFF at 7.13:1 contrast (WCAG AA passes).

Color values

HEX	#3F37EA
RGB	rgb(63, 55, 234)
HSL	hsl(243, 81%, 57%)
HSV	hsv(243, 76%, 92%)
CMYK	cmyk(73.1%, 76.5%, 0%, 8.2%)
CIE-LAB	lab(37.35, 58.57, -87.54)
CIE-LCH	lch(37.35, 105.32, 303.78°)
OKLab	oklab(48.53% 0.0154 -0.2533)
OKLCH	oklch(48.53% 0.254 273.5)
XYZ	xyz(18.2624, 9.7278, 78.7411)
Luminance	0.0973 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F37EA #E2EA37

analogous

#3788EA #3F37EA #9937EA

triadic

#3F37EA #EA3F37 #37EA3F

tetradic

#3F37EA #EA3788 #E2EA37 #37EA99

square

#3F37EA #EA3788 #E2EA37 #37EA99

split-complementary

#3F37EA #EA9937 #88EA37

monochromatic

#161097 #1E16CE #3F37EA #746EF0 #A9A6F6

Accessibility & contrast

On white

7.13

#3F37EA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.95

#3F37EA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F37EA

7.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F37EA	#FFFFFF	#000000	##FFFFFF
##3F37EA	1.00	7.13	2.95	7.13
#FFFFFF	7.13	1.00	21.00	1.00
#000000	2.95	21.00	1.00	21.00
##FFFFFF	7.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060EF

Deuteranopia (green-blind)

#004FE7

Tritanopia (blue-blind)

#006D8F

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f37ea;
/* rgb */ color: rgb(63, 55, 234);
/* oklch */ color: oklch(48.5% 0.254 273.5);

Tailwind

colors: {
  custom: {
    50: '#8e71f2',
    500: '#3f37ea',
    950: '#000000',
  },
}

SCSS

$custom: #3f37ea;
$custom-light: #8e71f2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f37ea",
  "rgb": {
    "r": 63,
    "g": 55,
    "b": 234
  },
  "hsl": {
    "h": 242.682,
    "s": 80.995,
    "l": 56.667
  },
  "oklch": {
    "l": 0.48532,
    "c": 0.25373,
    "h": 273.5
  },
  "luminance": 0.0973
}

Semantic roles & 50–950 ramp

primary

#3F37EA

secondary

#E0E39A

accent

#F730EE

background

#F9F7FF

surface

#F2EDFE

border

#CCC8D6

text

#0E0817

muted

#7E7B85

Preview Lab

Preview with #3F37EA

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

Preview Lab → · Contrast checker → · Palette generator →