#3F51E2#3F51E2

#3F51E2 is a mid, highly saturated blue. Relative luminance 0.124; OKLCH L 51.6% C 0.218 H 270.9°. Best body text is #FFFFFF at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#3F51E2
RGB	rgb(63, 81, 226)
HSL	hsl(233, 74%, 57%)
HSV	hsv(233, 72%, 89%)
CMYK	cmyk(72.1%, 64.2%, 0%, 11.4%)
CIE-LAB	lab(41.89, 41.35, -75.51)
CIE-LCH	lch(41.89, 86.09, 298.70°)
OKLab	oklab(51.56% 0.0034 -0.2183)
OKLCH	oklch(51.56% 0.218 270.9)
XYZ	xyz(18.7151, 12.4307, 73.3498)
Luminance	0.1243 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F51E2 #E2D03F

analogous

#3FA3E2 #3F51E2 #7F3FE2

triadic

#3F51E2 #E23F51 #51E23F

tetradic

#3F51E2 #E23FA3 #E2D03F #3FE27F

square

#3F51E2 #E23FA3 #E2D03F #3FE27F

split-complementary

#3F51E2 #E27F3F #A3E23F

monochromatic

#162391 #1E30C6 #3F51E2 #7481EA #A9B1F2

Accessibility & contrast

On white

6.02

#3F51E2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#3F51E2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F51E2

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F51E2	#FFFFFF	#000000	##FFFFFF
##3F51E2	1.00	6.02	3.49	6.02
#FFFFFF	6.02	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BE7

Deuteranopia (green-blind)

#005BDF

Tritanopia (blue-blind)

#007792

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f51e2;
/* rgb */ color: rgb(63, 81, 226);
/* oklch */ color: oklch(51.6% 0.218 270.9);

Tailwind

colors: {
  custom: {
    50: '#8a82ec',
    500: '#3f51e2',
    950: '#000000',
  },
}

SCSS

$custom: #3f51e2;
$custom-light: #8a82ec;
$custom-dark: #000000;

JSON

{
  "hex": "#3f51e2",
  "rgb": {
    "r": 63,
    "g": 81,
    "b": 226
  },
  "hsl": {
    "h": 233.374,
    "s": 73.756,
    "l": 56.667
  },
  "oklch": {
    "l": 0.51564,
    "c": 0.21829,
    "h": 270.9
  },
  "luminance": 0.12433
}

Semantic roles & 50–950 ramp

primary

#3F51E2

secondary

#E0D89D

accent

#DC37F0

background

#F9F7FE

surface

#F2EEFD

border

#CCC9D5

text

#0E0A16

muted

#7E7C84

Preview Lab

Preview with #3F51E2

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

Preview Lab → · Contrast checker → · Palette generator →