#3F4EB7#3F4EB7

#3F4EB7 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.4% C 0.166 H 272.3°. Best body text is #FFFFFF at 7.04:1 contrast (WCAG AA passes).

Color values

HEX	#3F4EB7
RGB	rgb(63, 78, 183)
HSL	hsl(233, 49%, 48%)
HSV	hsv(233, 66%, 72%)
CMYK	cmyk(65.6%, 57.4%, 0%, 28.2%)
CIE-LAB	lab(37.70, 28.22, -57.48)
CIE-LCH	lch(37.70, 64.03, 296.15°)
OKLab	oklab(47.4% 0.0067 -0.1654)
OKLCH	oklch(47.4% 0.166 272.3)
XYZ	xyz(13.3187, 9.9233, 46.0041)
Luminance	0.0992 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4EB7 #B7A83F

analogous

#3F8AB7 #3F4EB7 #6C3FB7

triadic

#3F4EB7 #B73F4E #4EB73F

tetradic

#3F4EB7 #B73F8A #B7A83F #3FB76C

square

#3F4EB7 #B73F8A #B7A83F #3FB76C

split-complementary

#3F4EB7 #B76C3F #8AB73F

monochromatic

#20275C #2F3B89 #3F4EB7 #6875CB #969EDB

Accessibility & contrast

On white

7.04

#3F4EB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.98

#3F4EB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4EB7

7.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4EB7	#FFFFFF	#000000	##FFFFFF
##3F4EB7	1.00	7.04	2.98	7.04
#FFFFFF	7.04	1.00	21.00	1.00
#000000	2.98	21.00	1.00	21.00
##FFFFFF	7.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBB

Deuteranopia (green-blind)

#0054B5

Tritanopia (blue-blind)

#00677B

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f4eb7;
/* rgb */ color: rgb(63, 78, 183);
/* oklch */ color: oklch(47.4% 0.166 272.3);

Tailwind

colors: {
  custom: {
    50: '#817fcd',
    500: '#3f4eb7',
    950: '#000000',
  },
}

SCSS

$custom: #3f4eb7;
$custom-light: #817fcd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4eb7",
  "rgb": {
    "r": 63,
    "g": 78,
    "b": 183
  },
  "hsl": {
    "h": 232.5,
    "s": 48.78,
    "l": 48.235
  },
  "oklch": {
    "l": 0.47396,
    "c": 0.16551,
    "h": 272.3
  },
  "luminance": 0.09924
}

Semantic roles & 50–950 ramp

primary

#3F4EB7

secondary

#C6BF8B

accent

#C74FD8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F4EB7

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

Preview Lab → · Contrast checker → · Palette generator →