#3F4DCD#3F4DCD

#3F4DCD is a mid, vivid blue. Relative luminance 0.108; OKLCH L 49.0% C 0.196 H 272.1°. Best body text is #FFFFFF at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F4DCD
RGB	rgb(63, 77, 205)
HSL	hsl(234, 59%, 53%)
HSV	hsv(234, 69%, 80%)
CMYK	cmyk(69.3%, 62.4%, 0%, 19.6%)
CIE-LAB	lab(39.19, 36.56, -67.89)
CIE-LCH	lch(39.19, 77.11, 298.30°)
OKLab	oklab(49.04% 0.0072 -0.196)
OKLCH	oklch(49.04% 0.196 272.1)
XYZ	xyz(15.7195, 10.7708, 58.9963)
Luminance	0.1077 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.78

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4DCD #CDBF3F

analogous

#3F94CD #3F4DCD #783FCD

triadic

#3F4DCD #CD3F4D #4DCD3F

tetradic

#3F4DCD #CD3F94 #CDBF3F #3FCD78

square

#3F4DCD #CD3F94 #CDBF3F #3FCD78

split-complementary

#3F4DCD #CD783F #94CD3F

monochromatic

#1E2774 #2B37A4 #3F4DCD #707ADA #A0A7E6

Accessibility & contrast

On white

6.66

#3F4DCD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.15

#3F4DCD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F4DCD

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4DCD	#FFFFFF	#000000	##FFFFFF
##3F4DCD	1.00	6.66	3.15	6.66
#FFFFFF	6.66	1.00	21.00	1.00
#000000	3.15	21.00	1.00	21.00
##FFFFFF	6.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063D1

Deuteranopia (green-blind)

#0056CB

Tritanopia (blue-blind)

#006E86

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3f4dcd;
/* rgb */ color: rgb(63, 77, 205);
/* oklch */ color: oklch(49.0% 0.196 272.1);

Tailwind

colors: {
  custom: {
    50: '#867fdd',
    500: '#3f4dcd',
    950: '#000000',
  },
}

SCSS

$custom: #3f4dcd;
$custom-light: #867fdd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4dcd",
  "rgb": {
    "r": 63,
    "g": 77,
    "b": 205
  },
  "hsl": {
    "h": 234.085,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.49039,
    "c": 0.19609,
    "h": 272.1
  },
  "luminance": 0.10772
}

Semantic roles & 50–950 ramp

primary

#3F4DCD

secondary

#D3CD95

accent

#D346E2

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #3F4DCD

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

Preview Lab → · Contrast checker → · Palette generator →