#3F4CB4#3F4CB4

#3F4CB4 is a mid, vivid blue. Relative luminance 0.095; OKLCH L 46.8% C 0.164 H 272.9°. Best body text is #FFFFFF at 7.23:1 contrast (WCAG AA passes).

Color values

HEX	#3F4CB4
RGB	rgb(63, 76, 180)
HSL	hsl(233, 48%, 48%)
HSV	hsv(233, 65%, 71%)
CMYK	cmyk(65%, 57.8%, 0%, 29.4%)
CIE-LAB	lab(36.97, 28.45, -56.91)
CIE-LCH	lch(36.97, 63.63, 296.56°)
OKLab	oklab(46.77% 0.0084 -0.1637)
OKLCH	oklch(46.77% 0.164 272.9)
XYZ	xyz(12.8698, 9.5198, 44.3305)
Luminance	0.0952 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4CB4 #B4A73F

analogous

#3F87B4 #3F4CB4 #6C3FB4

triadic

#3F4CB4 #B43F4C #4CB43F

tetradic

#3F4CB4 #B43F87 #B4A73F #3FB46C

square

#3F4CB4 #B43F87 #B4A73F #3FB46C

split-complementary

#3F4CB4 #B46C3F #87B43F

monochromatic

#1F2659 #2F3987 #3F4CB4 #6772CA #949CDA

Accessibility & contrast

On white

7.23

#3F4CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3F4CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4CB4

7.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4CB4	#FFFFFF	#000000	##FFFFFF
##3F4CB4	1.00	7.23	2.90	7.23
#FFFFFF	7.23	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB8

Deuteranopia (green-blind)

#0052B2

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f4cb4;
/* rgb */ color: rgb(63, 76, 180);
/* oklch */ color: oklch(46.8% 0.164 272.9);

Tailwind

colors: {
  custom: {
    50: '#817ecb',
    500: '#3f4cb4',
    950: '#000000',
  },
}

SCSS

$custom: #3f4cb4;
$custom-light: #817ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4cb4",
  "rgb": {
    "r": 63,
    "g": 76,
    "b": 180
  },
  "hsl": {
    "h": 233.333,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.46774,
    "c": 0.16394,
    "h": 272.9
  },
  "luminance": 0.09521
}

Semantic roles & 50–950 ramp

primary

#3F4CB4

secondary

#C5BE8A

accent

#C950D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4CB4

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

Preview Lab → · Contrast checker → · Palette generator →