#3F4BB0#3F4BB0

#3F4BB0 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.3% C 0.160 H 273.3°. Best body text is #FFFFFF at 7.38:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BB0
RGB	rgb(63, 75, 176)
HSL	hsl(234, 47%, 47%)
HSV	hsv(234, 64%, 69%)
CMYK	cmyk(64.2%, 57.4%, 0%, 31%)
CIE-LAB	lab(36.41, 27.69, -55.45)
CIE-LCH	lch(36.41, 61.98, 296.53°)
OKLab	oklab(46.26% 0.0092 -0.1594)
OKLCH	oklch(46.26% 0.16 273.3)
XYZ	xyz(12.3998, 9.2224, 42.1925)
Luminance	0.0922 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4BB0 #B0A43F

analogous

#3F84B0 #3F4BB0 #6C3FB0

triadic

#3F4BB0 #B03F4B #4BB03F

tetradic

#3F4BB0 #B03F84 #B0A43F #3FB06C

square

#3F4BB0 #B03F84 #B0A43F #3FB06C

split-complementary

#3F4BB0 #B06C3F #84B03F

monochromatic

#1F2556 #2F3883 #3F4BB0 #656FC8 #9299D8

Accessibility & contrast

On white

7.38

#3F4BB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#3F4BB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4BB0

7.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BB0	#FFFFFF	#000000	##FFFFFF
##3F4BB0	1.00	7.38	2.84	7.38
#FFFFFF	7.38	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB3

Deuteranopia (green-blind)

#0051AE

Tritanopia (blue-blind)

#006376

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f4bb0;
/* rgb */ color: rgb(63, 75, 176);
/* oklch */ color: oklch(46.3% 0.160 273.3);

Tailwind

colors: {
  custom: {
    50: '#807dc8',
    500: '#3f4bb0',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bb0;
$custom-light: #807dc8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bb0",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 176
  },
  "hsl": {
    "h": 233.628,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.46264,
    "c": 0.15971,
    "h": 273.3
  },
  "luminance": 0.09224
}

Semantic roles & 50–950 ramp

primary

#3F4BB0

secondary

#C3BD88

accent

#C951D7

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4BB0

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

Preview Lab → · Contrast checker → · Palette generator →