#3F4BB1#3F4BB1

#3F4BB1 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.3% C 0.161 H 273.3°. Best body text is #FFFFFF at 7.36:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BB1
RGB	rgb(63, 75, 177)
HSL	hsl(234, 48%, 47%)
HSV	hsv(234, 64%, 69%)
CMYK	cmyk(64.4%, 57.6%, 0%, 30.6%)
CIE-LAB	lab(36.48, 28.04, -55.92)
CIE-LCH	lch(36.48, 62.56, 296.63°)
OKLab	oklab(46.34% 0.0093 -0.1608)
OKLCH	oklch(46.34% 0.161 273.3)
XYZ	xyz(12.4992, 9.2622, 42.7155)
Luminance	0.0926 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4BB1 #B1A53F

analogous

#3F84B1 #3F4BB1 #6C3FB1

triadic

#3F4BB1 #B13F4B #4BB13F

tetradic

#3F4BB1 #B13F84 #B1A53F #3FB16C

square

#3F4BB1 #B13F84 #B1A53F #3FB16C

split-complementary

#3F4BB1 #B16C3F #84B13F

monochromatic

#1F2557 #2F3884 #3F4BB1 #656FC8 #929AD8

Accessibility & contrast

On white

7.36

#3F4BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#3F4BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4BB1

7.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BB1	#FFFFFF	#000000	##FFFFFF
##3F4BB1	1.00	7.36	2.85	7.36
#FFFFFF	7.36	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB4

Deuteranopia (green-blind)

#0051AF

Tritanopia (blue-blind)

#006476

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f4bb1;
/* rgb */ color: rgb(63, 75, 177);
/* oklch */ color: oklch(46.3% 0.161 273.3);

Tailwind

colors: {
  custom: {
    50: '#817dc9',
    500: '#3f4bb1',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bb1;
$custom-light: #817dc9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bb1",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 177
  },
  "hsl": {
    "h": 233.684,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.46344,
    "c": 0.16109,
    "h": 273.3
  },
  "luminance": 0.09263
}

Semantic roles & 50–950 ramp

primary

#3F4BB1

secondary

#C4BD88

accent

#C951D7

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4BB1

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

Preview Lab → · Contrast checker → · Palette generator →