#3F43C5#3F43C5

#3F43C5 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.6% C 0.197 H 274.3°. Best body text is #FFFFFF at 7.45:1 contrast (WCAG AA passes).

Color values

HEX	#3F43C5
RGB	rgb(63, 67, 197)
HSL	hsl(238, 54%, 51%)
HSV	hsv(238, 68%, 77%)
CMYK	cmyk(68%, 66%, 0%, 22.7%)
CIE-LAB	lab(36.18, 39.98, -68.18)
CIE-LCH	lch(36.18, 79.03, 300.39°)
OKLab	oklab(46.63% 0.0149 -0.1969)
OKLCH	oklch(46.63% 0.197 274.3)
XYZ	xyz(14.1318, 9.1010, 53.8244)
Luminance	0.0910 (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

#3F43C5 #C5C13F

analogous

#3F86C5 #3F43C5 #7E3FC5

triadic

#3F43C5 #C53F43 #43C53F

tetradic

#3F43C5 #C53F86 #C5C13F #3FC57E

square

#3F43C5 #C53F86 #C5C13F #3FC57E

split-complementary

#3F43C5 #C57E3F #86C53F

monochromatic

#20226A #2E3199 #3F43C5 #6E71D3 #9D9FE1

Accessibility & contrast

On white

7.45

#3F43C5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3F43C5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F43C5

7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43C5	#FFFFFF	#000000	##FFFFFF
##3F43C5	1.00	7.45	2.82	7.45
#FFFFFF	7.45	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BC9

Deuteranopia (green-blind)

#004FC3

Tritanopia (blue-blind)

#00657E

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f43c5;
/* rgb */ color: rgb(63, 67, 197);
/* oklch */ color: oklch(46.6% 0.197 274.3);

Tailwind

colors: {
  custom: {
    50: '#8577d8',
    500: '#3f43c5',
    950: '#000000',
  },
}

SCSS

$custom: #3f43c5;
$custom-light: #8577d8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43c5",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 197
  },
  "hsl": {
    "h": 238.209,
    "s": 53.6,
    "l": 50.98
  },
  "oklch": {
    "l": 0.46625,
    "c": 0.19742,
    "h": 274.3
  },
  "luminance": 0.09102
}

Semantic roles & 50–950 ramp

primary

#3F43C5

secondary

#CECC92

accent

#D94BDD

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3F43C5

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

Preview Lab → · Contrast checker → · Palette generator →