#3F4FB1#3F4FB1

#3F4FB1 is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.1% C 0.156 H 272.0°. Best body text is #FFFFFF at 7.08:1 contrast (WCAG AA passes).

Color values

HEX	#3F4FB1
RGB	rgb(63, 79, 177)
HSL	hsl(232, 48%, 47%)
HSV	hsv(232, 64%, 69%)
CMYK	cmyk(64.4%, 55.4%, 0%, 30.6%)
CIE-LAB	lab(37.52, 25.45, -54.24)
CIE-LCH	lch(37.52, 59.92, 295.14°)
OKLab	oklab(47.12% 0.0056 -0.1558)
OKLCH	oklch(47.12% 0.156 272)
XYZ	xyz(12.7790, 9.8219, 42.8088)
Luminance	0.0982 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4FB1 #B1A13F

analogous

#3F88B1 #3F4FB1 #683FB1

triadic

#3F4FB1 #B13F4F #4FB13F

tetradic

#3F4FB1 #B13F88 #B1A13F #3FB168

square

#3F4FB1 #B13F88 #B1A13F #3FB168

split-complementary

#3F4FB1 #B1683F #88B13F

monochromatic

#1F2757 #2F3B84 #3F4FB1 #6573C8 #929CD8

Accessibility & contrast

On white

7.08

#3F4FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#3F4FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4FB1

7.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4FB1	#FFFFFF	#000000	##FFFFFF
##3F4FB1	1.00	7.08	2.96	7.08
#FFFFFF	7.08	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EB4

Deuteranopia (green-blind)

#0053AF

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f4fb1;
/* rgb */ color: rgb(63, 79, 177);
/* oklch */ color: oklch(47.1% 0.156 272.0);

Tailwind

colors: {
  custom: {
    50: '#8080c9',
    500: '#3f4fb1',
    950: '#000000',
  },
}

SCSS

$custom: #3f4fb1;
$custom-light: #8080c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4fb1",
  "rgb": {
    "r": 63,
    "g": 79,
    "b": 177
  },
  "hsl": {
    "h": 231.579,
    "s": 47.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.47119,
    "c": 0.15593,
    "h": 272
  },
  "luminance": 0.09823
}

Semantic roles & 50–950 ramp

primary

#3F4FB1

secondary

#C4BB88

accent

#C451D7

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3F4FB1

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

Preview Lab → · Contrast checker → · Palette generator →