#3F43C0#3F43C0

#3F43C0 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 46.2% C 0.191 H 274.6°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#3F43C0
RGB	rgb(63, 67, 192)
HSL	hsl(238, 51%, 50%)
HSV	hsv(238, 67%, 75%)
CMYK	cmyk(67.2%, 65.1%, 0%, 24.7%)
CIE-LAB	lab(35.74, 38.28, -65.96)
CIE-LCH	lch(35.74, 76.27, 300.13°)
OKLab	oklab(46.18% 0.0153 -0.1904)
OKLCH	oklch(46.18% 0.191 274.6)
XYZ	xyz(13.5683, 8.8756, 50.8571)
Luminance	0.0888 (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

#3F43C0 #C0BC3F

analogous

#3F83C0 #3F43C0 #7C3FC0

triadic

#3F43C0 #C03F43 #43C03F

tetradic

#3F43C0 #C03F83 #C0BC3F #3FC07C

square

#3F43C0 #C03F83 #C0BC3F #3FC07C

split-complementary

#3F43C0 #C07C3F #83C03F

monochromatic

#212364 #303392 #3F43C0 #6D70CF #9B9DDE

Accessibility & contrast

On white

7.57

#3F43C0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#3F43C0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F43C0

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43C0	#FFFFFF	#000000	##FFFFFF
##3F43C0	1.00	7.57	2.78	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AC4

Deuteranopia (green-blind)

#004EBE

Tritanopia (blue-blind)

#00647B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3f43c0;
/* rgb */ color: rgb(63, 67, 192);
/* oklch */ color: oklch(46.2% 0.191 274.6);

Tailwind

colors: {
  custom: {
    50: '#8477d4',
    500: '#3f43c0',
    950: '#000000',
  },
}

SCSS

$custom: #3f43c0;
$custom-light: #8477d4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43c0",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 192
  },
  "hsl": {
    "h": 238.14,
    "s": 50.588,
    "l": 50
  },
  "oklch": {
    "l": 0.46175,
    "c": 0.19099,
    "h": 274.6
  },
  "luminance": 0.08877
}

Semantic roles & 50–950 ramp

primary

#3F43C0

secondary

#CAC991

accent

#D64EDA

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3F43C0

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

Preview Lab → · Contrast checker → · Palette generator →