#3F50C8#3F50C8

#3F50C8 is a mid, vivid blue. Relative luminance 0.110; OKLCH L 49.2% C 0.186 H 271.6°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F50C8
RGB	rgb(63, 80, 200)
HSL	hsl(233, 55%, 52%)
HSV	hsv(233, 69%, 78%)
CMYK	cmyk(68.5%, 60%, 0%, 21.6%)
CIE-LAB	lab(39.52, 32.93, -64.46)
CIE-LCH	lch(39.52, 72.39, 297.06°)
OKLab	oklab(49.15% 0.0051 -0.1859)
OKLCH	oklch(49.15% 0.186 271.6)
XYZ	xyz(15.3404, 10.9627, 55.9400)
Luminance	0.1096 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50C8 #C8B73F

analogous

#3F95C8 #3F50C8 #733FC8

triadic

#3F50C8 #C83F50 #50C83F

tetradic

#3F50C8 #C83F95 #C8B73F #3FC873

square

#3F50C8 #C83F95 #C8B73F #3FC873

split-complementary

#3F50C8 #C8733F #95C83F

monochromatic

#1F296D #2D3B9D #3F50C8 #6F7BD6 #9EA7E3

Accessibility & contrast

On white

6.58

#3F50C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3F50C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50C8

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50C8	#FFFFFF	#000000	##FFFFFF
##3F50C8	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063CC

Deuteranopia (green-blind)

#0057C6

Tritanopia (blue-blind)

#006E84

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f50c8;
/* rgb */ color: rgb(63, 80, 200);
/* oklch */ color: oklch(49.2% 0.186 271.6);

Tailwind

colors: {
  custom: {
    50: '#8581da',
    500: '#3f50c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f50c8;
$custom-light: #8581da;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50c8",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 200
  },
  "hsl": {
    "h": 232.555,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.49154,
    "c": 0.18595,
    "h": 271.6
  },
  "luminance": 0.10964
}

Semantic roles & 50–950 ramp

primary

#3F50C8

secondary

#D0C893

accent

#CC49DF

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F50C8

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

Preview Lab → · Contrast checker → · Palette generator →