#3F50CC#3F50CC

#3F50CC is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.5% C 0.191 H 271.5°. Best body text is #FFFFFF at 6.50:1 contrast (WCAG AA passes).

Color values

HEX	#3F50CC
RGB	rgb(63, 80, 204)
HSL	hsl(233, 58%, 52%)
HSV	hsv(233, 69%, 80%)
CMYK	cmyk(69.1%, 60.8%, 0%, 20%)
CIE-LAB	lab(39.84, 34.33, -66.26)
CIE-LCH	lch(39.84, 74.63, 297.39°)
OKLab	oklab(49.49% 0.005 -0.1912)
OKLCH	oklch(49.49% 0.191 271.5)
XYZ	xyz(15.8140, 11.1522, 58.4342)
Luminance	0.1115 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F50CC #CCBB3F

analogous

#3F97CC #3F50CC #753FCC

triadic

#3F50CC #CC3F50 #50CC3F

tetradic

#3F50CC #CC3F97 #CCBB3F #3FCC75

square

#3F50CC #CC3F97 #CCBB3F #3FCC75

split-complementary

#3F50CC #CC753F #97CC3F

monochromatic

#1E2872 #2B3AA3 #3F50CC #6F7CD9 #A0A8E6

Accessibility & contrast

On white

6.50

#3F50CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.23

#3F50CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F50CC

6.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F50CC	#FFFFFF	#000000	##FFFFFF
##3F50CC	1.00	6.50	3.23	6.50
#FFFFFF	6.50	1.00	21.00	1.00
#000000	3.23	21.00	1.00	21.00
##FFFFFF	6.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064D0

Deuteranopia (green-blind)

#0058CA

Tritanopia (blue-blind)

#006F86

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f50cc;
/* rgb */ color: rgb(63, 80, 204);
/* oklch */ color: oklch(49.5% 0.191 271.5);

Tailwind

colors: {
  custom: {
    50: '#8681dc',
    500: '#3f50cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f50cc;
$custom-light: #8681dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f50cc",
  "rgb": {
    "r": 63,
    "g": 80,
    "b": 204
  },
  "hsl": {
    "h": 232.766,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.49489,
    "c": 0.19123,
    "h": 271.5
  },
  "luminance": 0.11154
}

Semantic roles & 50–950 ramp

primary

#3F50CC

secondary

#D2CB95

accent

#CF47E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #3F50CC

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

Preview Lab → · Contrast checker → · Palette generator →