#3F52CB#3F52CB

#3F52CB is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.8% C 0.187 H 271.1°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#3F52CB
RGB	rgb(63, 82, 203)
HSL	hsl(232, 57%, 52%)
HSV	hsv(232, 69%, 80%)
CMYK	cmyk(69%, 59.6%, 0%, 20.4%)
CIE-LAB	lab(40.25, 32.72, -65.01)
CIE-LCH	lch(40.25, 72.78, 296.72°)
OKLab	oklab(49.77% 0.0035 -0.1875)
OKLCH	oklch(49.77% 0.187 271.1)
XYZ	xyz(15.8430, 11.4016, 57.8541)
Luminance	0.1140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F52CB #CBB83F

analogous

#3F98CB #3F52CB #723FCB

triadic

#3F52CB #CB3F52 #52CB3F

tetradic

#3F52CB #CB3F98 #CBB83F #3FCB72

square

#3F52CB #CB3F98 #CBB83F #3FCB72

split-complementary

#3F52CB #CB723F #98CB3F

monochromatic

#1F2A71 #2C3CA1 #3F52CB #6F7DD8 #9FA9E5

Accessibility & contrast

On white

6.40

#3F52CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#3F52CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F52CB

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F52CB	#FFFFFF	#000000	##FFFFFF
##3F52CB	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065CF

Deuteranopia (green-blind)

#0059C9

Tritanopia (blue-blind)

#007086

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3f52cb;
/* rgb */ color: rgb(63, 82, 203);
/* oklch */ color: oklch(49.8% 0.187 271.1);

Tailwind

colors: {
  custom: {
    50: '#8582dc',
    500: '#3f52cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f52cb;
$custom-light: #8582dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f52cb",
  "rgb": {
    "r": 63,
    "g": 82,
    "b": 203
  },
  "hsl": {
    "h": 231.857,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.4977,
    "c": 0.18749,
    "h": 271.1
  },
  "luminance": 0.11403
}

Semantic roles & 50–950 ramp

primary

#3F52CB

secondary

#D1C994

accent

#CC47E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F52CB

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

Preview Lab → · Contrast checker → · Palette generator →