#3F50C7#3F50C7

#3F50C7 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 49.1% C 0.185 H 271.6°. Best body text is #FFFFFF at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#3F50C7
RGB	rgb(63, 80, 199)
HSL	hsl(233, 55%, 51%)
HSV	hsv(233, 68%, 78%)
CMYK	cmyk(68.3%, 59.8%, 0%, 22%)
CIE-LAB	lab(39.44, 32.58, -64.01)
CIE-LCH	lch(39.44, 71.82, 296.97°)
OKLab	oklab(49.07% 0.0051 -0.1845)
OKLCH	oklch(49.07% 0.185 271.6)
XYZ	xyz(15.2239, 10.9162, 55.3265)
Luminance	0.1092 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50C7 #C7B63F

analogous

#3F94C7 #3F50C7 #723FC7

triadic

#3F50C7 #C73F50 #50C73F

tetradic

#3F50C7 #C73F94 #C7B63F #3FC772

square

#3F50C7 #C73F94 #C7B63F #3FC772

split-complementary

#3F50C7 #C7723F #94C73F

monochromatic

#20296C #2D3B9B #3F50C7 #6E7BD5 #9EA6E3

Accessibility & contrast

On white

6.60

#3F50C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#3F50C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50C7

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50C7	#FFFFFF	#000000	##FFFFFF
##3F50C7	1.00	6.60	3.18	6.60
#FFFFFF	6.60	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063CB

Deuteranopia (green-blind)

#0057C5

Tritanopia (blue-blind)

#006E84

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f50c7;
/* rgb */ color: rgb(63, 80, 199);
/* oklch */ color: oklch(49.1% 0.185 271.6);

Tailwind

colors: {
  custom: {
    50: '#8581d9',
    500: '#3f50c7',
    950: '#000000',
  },
}

SCSS

$custom: #3f50c7;
$custom-light: #8581d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50c7",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 199
  },
  "hsl": {
    "h": 232.5,
    "s": 54.839,
    "l": 51.373
  },
  "oklch": {
    "l": 0.49071,
    "c": 0.18462,
    "h": 271.6
  },
  "luminance": 0.10918
}

Semantic roles & 50–950 ramp

primary

#3F50C7

secondary

#CFC793

accent

#CC4ADE

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F50C7

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

Preview Lab → · Contrast checker → · Palette generator →