#3F4AB3#3F4AB3

#3F4AB3 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.3% C 0.165 H 273.5°. Best body text is #FFFFFF at 7.39:1 contrast (WCAG AA passes).

Color values

HEX	#3F4AB3
RGB	rgb(63, 74, 179)
HSL	hsl(234, 48%, 47%)
HSV	hsv(234, 65%, 70%)
CMYK	cmyk(64.8%, 58.7%, 0%, 29.8%)
CIE-LAB	lab(36.38, 29.38, -57.27)
CIE-LCH	lch(36.38, 64.37, 297.16°)
OKLab	oklab(46.32% 0.0102 -0.1648)
OKLCH	oklch(46.32% 0.165 273.5)
XYZ	xyz(12.6327, 9.2079, 43.7507)
Luminance	0.0921 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4AB3 #B3A83F

analogous

#3F84B3 #3F4AB3 #6E3FB3

triadic

#3F4AB3 #B33F4A #4AB33F

tetradic

#3F4AB3 #B33F84 #B3A83F #3FB36E

square

#3F4AB3 #B33F84 #B3A83F #3FB36E

split-complementary

#3F4AB3 #B36E3F #84B33F

monochromatic

#1F2558 #2F3786 #3F4AB3 #666FC9 #939AD9

Accessibility & contrast

On white

7.39

#3F4AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#3F4AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4AB3

7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4AB3	#FFFFFF	#000000	##FFFFFF
##3F4AB3	1.00	7.39	2.84	7.39
#FFFFFF	7.39	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB7

Deuteranopia (green-blind)

#0051B1

Tritanopia (blue-blind)

#006477

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f4ab3;
/* rgb */ color: rgb(63, 74, 179);
/* oklch */ color: oklch(46.3% 0.165 273.5);

Tailwind

colors: {
  custom: {
    50: '#817ccb',
    500: '#3f4ab3',
    950: '#000000',
  },
}

SCSS

$custom: #3f4ab3;
$custom-light: #817ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4ab3",
  "rgb": {
    "r": 63,
    "g": 74,
    "b": 179
  },
  "hsl": {
    "h": 234.31,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.46315,
    "c": 0.16511,
    "h": 273.5
  },
  "luminance": 0.09209
}

Semantic roles & 50–950 ramp

primary

#3F4AB3

secondary

#C4BF89

accent

#CB50D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4AB3

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

Preview Lab → · Contrast checker → · Palette generator →