#3F43BA#3F43BA

#3F43BA is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.6% C 0.183 H 274.9°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#3F43BA
RGB	rgb(63, 67, 186)
HSL	hsl(238, 49%, 49%)
HSV	hsv(238, 66%, 73%)
CMYK	cmyk(66.1%, 64%, 0%, 27.1%)
CIE-LAB	lab(35.23, 36.24, -63.27)
CIE-LCH	lch(35.23, 72.92, 299.80°)
OKLab	oklab(45.64% 0.0158 -0.1825)
OKLCH	oklch(45.64% 0.183 274.9)
XYZ	xyz(12.9171, 8.6151, 47.4270)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F43BA #BAB63F

analogous

#3F81BA #3F43BA #793FBA

triadic

#3F43BA #BA3F43 #43BA3F

tetradic

#3F43BA #BA3F81 #BAB63F #3FBA79

square

#3F43BA #BA3F81 #BAB63F #3FBA79

split-complementary

#3F43BA #BA793F #81BA3F

monochromatic

#20225F #30338C #3F43BA #6A6DCC #979ADC

Accessibility & contrast

On white

7.71

#3F43BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#3F43BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F43BA

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43BA	#FFFFFF	#000000	##FFFFFF
##3F43BA	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058BE

Deuteranopia (green-blind)

#004DB8

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f43ba;
/* rgb */ color: rgb(63, 67, 186);
/* oklch */ color: oklch(45.6% 0.183 274.9);

Tailwind

colors: {
  custom: {
    50: '#8377d0',
    500: '#3f43ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f43ba;
$custom-light: #8377d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43ba",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 186
  },
  "hsl": {
    "h": 238.049,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.45644,
    "c": 0.18317,
    "h": 274.9
  },
  "luminance": 0.08616
}

Semantic roles & 50–950 ramp

primary

#3F43BA

secondary

#C8C68D

accent

#D44FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F43BA

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

Preview Lab → · Contrast checker → · Palette generator →