#3F4AB4#3F4AB4

#3F4AB4 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.4% C 0.166 H 273.5°. Best body text is #FFFFFF at 7.37:1 contrast (WCAG AA passes).

Color values

HEX	#3F4AB4
RGB	rgb(63, 74, 180)
HSL	hsl(234, 48%, 48%)
HSV	hsv(234, 65%, 71%)
CMYK	cmyk(65%, 58.9%, 0%, 29.4%)
CIE-LAB	lab(36.46, 29.73, -57.74)
CIE-LCH	lch(36.46, 64.94, 297.25°)
OKLab	oklab(46.4% 0.0102 -0.1662)
OKLCH	oklch(46.4% 0.166 273.5)
XYZ	xyz(12.7342, 9.2485, 44.2852)
Luminance	0.0925 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4AB4 #B4A93F

analogous

#3F84B4 #3F4AB4 #6E3FB4

triadic

#3F4AB4 #B43F4A #4AB43F

tetradic

#3F4AB4 #B43F84 #B4A93F #3FB46E

square

#3F4AB4 #B43F84 #B4A93F #3FB46E

split-complementary

#3F4AB4 #B46E3F #84B43F

monochromatic

#1F2559 #2F3787 #3F4AB4 #6770CA #949ADA

Accessibility & contrast

On white

7.37

#3F4AB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#3F4AB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4AB4

7.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4AB4	#FFFFFF	#000000	##FFFFFF
##3F4AB4	1.00	7.37	2.85	7.37
#FFFFFF	7.37	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB8

Deuteranopia (green-blind)

#0051B2

Tritanopia (blue-blind)

#006478

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f4ab4;
/* rgb */ color: rgb(63, 74, 180);
/* oklch */ color: oklch(46.4% 0.166 273.5);

Tailwind

colors: {
  custom: {
    50: '#817ccb',
    500: '#3f4ab4',
    950: '#000000',
  },
}

SCSS

$custom: #3f4ab4;
$custom-light: #817ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4ab4",
  "rgb": {
    "r": 63,
    "g": 74,
    "b": 180
  },
  "hsl": {
    "h": 234.359,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.46397,
    "c": 0.16648,
    "h": 273.5
  },
  "luminance": 0.0925
}

Semantic roles & 50–950 ramp

primary

#3F4AB4

secondary

#C5BF8A

accent

#CB50D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4AB4

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

Preview Lab → · Contrast checker → · Palette generator →