#3F4CB5#3F4CB5

#3F4CB5 is a mid, vivid blue. Relative luminance 0.096; OKLCH L 46.9% C 0.165 H 272.9°. Best body text is #FFFFFF at 7.21:1 contrast (WCAG AA passes).

Color values

HEX	#3F4CB5
RGB	rgb(63, 76, 181)
HSL	hsl(233, 48%, 48%)
HSV	hsv(233, 65%, 71%)
CMYK	cmyk(65.2%, 58%, 0%, 29%)
CIE-LAB	lab(37.04, 28.80, -57.38)
CIE-LCH	lch(37.04, 64.20, 296.65°)
OKLab	oklab(46.86% 0.0084 -0.1651)
OKLCH	oklch(46.86% 0.165 272.9)
XYZ	xyz(12.9720, 9.5607, 44.8689)
Luminance	0.0956 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4CB5 #B5A83F

analogous

#3F87B5 #3F4CB5 #6D3FB5

triadic

#3F4CB5 #B53F4C #4CB53F

tetradic

#3F4CB5 #B53F87 #B5A83F #3FB56D

square

#3F4CB5 #B53F87 #B5A83F #3FB56D

split-complementary

#3F4CB5 #B56D3F #87B53F

monochromatic

#1F265A #2F3988 #3F4CB5 #6772CA #949CDA

Accessibility & contrast

On white

7.21

#3F4CB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#3F4CB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4CB5

7.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4CB5	#FFFFFF	#000000	##FFFFFF
##3F4CB5	1.00	7.21	2.91	7.21
#FFFFFF	7.21	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB9

Deuteranopia (green-blind)

#0052B3

Tritanopia (blue-blind)

#006679

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f4cb5;
/* rgb */ color: rgb(63, 76, 181);
/* oklch */ color: oklch(46.9% 0.165 272.9);

Tailwind

colors: {
  custom: {
    50: '#817ecc',
    500: '#3f4cb5',
    950: '#000000',
  },
}

SCSS

$custom: #3f4cb5;
$custom-light: #817ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4cb5",
  "rgb": {
    "r": 63,
    "g": 76,
    "b": 181
  },
  "hsl": {
    "h": 233.39,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.46855,
    "c": 0.16531,
    "h": 272.9
  },
  "luminance": 0.09562
}

Semantic roles & 50–950 ramp

primary

#3F4CB5

secondary

#C5BF8A

accent

#C950D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4CB5

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

Preview Lab → · Contrast checker → · Palette generator →