#3F50C5#3F50C5

#3F50C5 is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.9% C 0.182 H 271.6°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#3F50C5
RGB	rgb(63, 80, 197)
HSL	hsl(232, 54%, 51%)
HSV	hsv(232, 68%, 77%)
CMYK	cmyk(68%, 59.4%, 0%, 22.7%)
CIE-LAB	lab(39.28, 31.87, -63.10)
CIE-LCH	lch(39.28, 70.70, 296.80°)
OKLab	oklab(48.91% 0.0051 -0.1819)
OKLCH	oklch(48.91% 0.182 271.6)
XYZ	xyz(14.9932, 10.8239, 54.1116)
Luminance	0.1082 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50C5 #C5B43F

analogous

#3F93C5 #3F50C5 #713FC5

triadic

#3F50C5 #C53F50 #50C53F

tetradic

#3F50C5 #C53F93 #C5B43F #3FC571

square

#3F50C5 #C53F93 #C5B43F #3FC571

split-complementary

#3F50C5 #C5713F #93C53F

monochromatic

#20296A #2E3C99 #3F50C5 #6E7BD3 #9DA6E1

Accessibility & contrast

On white

6.64

#3F50C5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#3F50C5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50C5

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50C5	#FFFFFF	#000000	##FFFFFF
##3F50C5	1.00	6.64	3.17	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C9

Deuteranopia (green-blind)

#0057C3

Tritanopia (blue-blind)

#006D83

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f50c5;
/* rgb */ color: rgb(63, 80, 197);
/* oklch */ color: oklch(48.9% 0.182 271.6);

Tailwind

colors: {
  custom: {
    50: '#8481d7',
    500: '#3f50c5',
    950: '#000000',
  },
}

SCSS

$custom: #3f50c5;
$custom-light: #8481d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50c5",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 197
  },
  "hsl": {
    "h": 232.388,
    "s": 53.6,
    "l": 50.98
  },
  "oklch": {
    "l": 0.48906,
    "c": 0.18196,
    "h": 271.6
  },
  "luminance": 0.10825
}

Semantic roles & 50–950 ramp

primary

#3F50C5

secondary

#CEC692

accent

#CA4BDD

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F50C5

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

Preview Lab → · Contrast checker → · Palette generator →