#3F50BA#3F50BA

#3F50BA is a mid, vivid blue. Relative luminance 0.103; OKLCH L 48.0% C 0.167 H 271.7°. Best body text is #FFFFFF at 6.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F50BA
RGB	rgb(63, 80, 186)
HSL	hsl(232, 49%, 49%)
HSV	hsv(232, 66%, 73%)
CMYK	cmyk(66.1%, 57%, 0%, 27.1%)
CIE-LAB	lab(38.44, 27.99, -58.05)
CIE-LCH	lch(38.44, 64.44, 295.75°)
OKLab	oklab(48.02% 0.005 -0.167)
OKLCH	oklch(48.02% 0.167 271.7)
XYZ	xyz(13.7785, 10.3380, 47.7142)
Luminance	0.1034 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50BA #BAA93F

analogous

#3F8EBA #3F50BA #6C3FBA

triadic

#3F50BA #BA3F50 #50BA3F

tetradic

#3F50BA #BA3F8E #BAA93F #3FBA6C

square

#3F50BA #BA3F8E #BAA93F #3FBA6C

split-complementary

#3F50BA #BA6C3F #8EBA3F

monochromatic

#20295F #303C8C #3F50BA #6A77CC #97A1DC

Accessibility & contrast

On white

6.85

#3F50BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#3F50BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50BA

6.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50BA	#FFFFFF	#000000	##FFFFFF
##3F50BA	1.00	6.85	3.07	6.85
#FFFFFF	6.85	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060BE

Deuteranopia (green-blind)

#0055B8

Tritanopia (blue-blind)

#006A7D

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3f50ba;
/* rgb */ color: rgb(63, 80, 186);
/* oklch */ color: oklch(48.0% 0.167 271.7);

Tailwind

colors: {
  custom: {
    50: '#8280cf',
    500: '#3f50ba',
    950: '#000000',
  },
}

SCSS

$custom: #3f50ba;
$custom-light: #8280cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50ba",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 186
  },
  "hsl": {
    "h": 231.707,
    "s": 49.398,
    "l": 48.824
  },
  "oklch": {
    "l": 0.48017,
    "c": 0.16709,
    "h": 271.7
  },
  "luminance": 0.10339
}

Semantic roles & 50–950 ramp

primary

#3F50BA

secondary

#C8C08D

accent

#C64FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F50BA

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

Preview Lab → · Contrast checker → · Palette generator →