#3F4BB5#3F4BB5

#3F4BB5 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.7% C 0.167 H 273.2°. Best body text is #FFFFFF at 7.28:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BB5
RGB	rgb(63, 75, 181)
HSL	hsl(234, 48%, 48%)
HSV	hsv(234, 65%, 71%)
CMYK	cmyk(65.2%, 58.6%, 0%, 29%)
CIE-LAB	lab(36.79, 29.44, -57.79)
CIE-LCH	lch(36.79, 64.86, 297.00°)
OKLab	oklab(46.67% 0.0093 -0.1663)
OKLCH	oklch(46.67% 0.167 273.2)
XYZ	xyz(12.9037, 9.4240, 44.8461)
Luminance	0.0943 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4BB5 #B5A93F

analogous

#3F86B5 #3F4BB5 #6E3FB5

triadic

#3F4BB5 #B53F4B #4BB53F

tetradic

#3F4BB5 #B53F86 #B5A93F #3FB56E

square

#3F4BB5 #B53F86 #B5A93F #3FB56E

split-complementary

#3F4BB5 #B56E3F #86B53F

monochromatic

#1F255A #2F3888 #3F4BB5 #6771CA #949CDA

Accessibility & contrast

On white

7.28

#3F4BB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#3F4BB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4BB5

7.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BB5	#FFFFFF	#000000	##FFFFFF
##3F4BB5	1.00	7.28	2.89	7.28
#FFFFFF	7.28	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB9

Deuteranopia (green-blind)

#0051B3

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f4bb5;
/* rgb */ color: rgb(63, 75, 181);
/* oklch */ color: oklch(46.7% 0.167 273.2);

Tailwind

colors: {
  custom: {
    50: '#817dcc',
    500: '#3f4bb5',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bb5;
$custom-light: #817dcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bb5",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 181
  },
  "hsl": {
    "h": 233.898,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.46666,
    "c": 0.16658,
    "h": 273.2
  },
  "luminance": 0.09425
}

Semantic roles & 50–950 ramp

primary

#3F4BB5

secondary

#C5BF8A

accent

#CA50D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0913

muted

#7D7B82

Preview Lab

Preview with #3F4BB5

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

Preview Lab → · Contrast checker → · Palette generator →