#3E51BB#3E51BB

#3E51BB is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.2% C 0.167 H 271.1°. Best body text is #FFFFFF at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#3E51BB
RGB	rgb(62, 81, 187)
HSL	hsl(231, 50%, 49%)
HSV	hsv(231, 67%, 73%)
CMYK	cmyk(66.8%, 56.7%, 0%, 26.7%)
CIE-LAB	lab(38.72, 27.55, -58.19)
CIE-LCH	lch(38.72, 64.38, 295.33°)
OKLab	oklab(48.23% 0.0031 -0.1674)
OKLCH	oklch(48.23% 0.167 271.1)
XYZ	xyz(13.8956, 10.4956, 48.2976)
Luminance	0.1050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3E51BB #BBA83E

analogous

#3E90BB #3E51BB #6A3EBB

triadic

#3E51BB #BB3E51 #51BB3E

tetradic

#3E51BB #BB3E90 #BBA83E #3EBB6A

square

#3E51BB #BB3E90 #BBA83E #3EBB6A

split-complementary

#3E51BB #BB6A3E #90BB3E

monochromatic

#20295F #2F3D8D #3E51BB #6978CD #97A1DC

Accessibility & contrast

On white

6.78

#3E51BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#3E51BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3E51BB

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3E51BB	#FFFFFF	#000000	##FFFFFF
##3E51BB	1.00	6.78	3.10	6.78
#FFFFFF	6.78	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061BF

Deuteranopia (green-blind)

#0056B9

Tritanopia (blue-blind)

#006B7E

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3e51bb;
/* rgb */ color: rgb(62, 81, 187);
/* oklch */ color: oklch(48.2% 0.167 271.1);

Tailwind

colors: {
  custom: {
    50: '#8281d0',
    500: '#3e51bb',
    950: '#000000',
  },
}

SCSS

$custom: #3e51bb;
$custom-light: #8281d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3e51bb",
  "rgb": {
    "r": 62,
    "g": 81,
    "b": 187
  },
  "hsl": {
    "h": 230.88,
    "s": 50.201,
    "l": 48.824
  },
  "oklch": {
    "l": 0.48231,
    "c": 0.16748,
    "h": 271.1
  },
  "luminance": 0.10497
}

Semantic roles & 50–950 ramp

primary

#3E51BB

secondary

#C8BF8D

accent

#C44EDA

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3E51BB

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

Preview Lab → · Contrast checker → · Palette generator →