#3F49CB#3F49CB

#3F49CB is a mid, vivid blue. Relative luminance 0.101; OKLCH L 48.2% C 0.198 H 272.9°. Best body text is #FFFFFF at 6.94:1 contrast (WCAG AA passes).

Color values

HEX	#3F49CB
RGB	rgb(63, 73, 203)
HSL	hsl(236, 57%, 52%)
HSV	hsv(236, 69%, 80%)
CMYK	cmyk(69%, 64%, 0%, 20.4%)
CIE-LAB	lab(38.08, 38.35, -68.55)
CIE-LCH	lch(38.08, 78.55, 299.22°)
OKLab	oklab(48.17% 0.0102 -0.1979)
OKLCH	oklch(48.17% 0.198 272.9)
XYZ	xyz(15.2083, 10.1322, 57.6426)
Luminance	0.1013 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F49CB #CBC13F

analogous

#3F8FCB #3F49CB #7B3FCB

triadic

#3F49CB #CB3F49 #49CB3F

tetradic

#3F49CB #CB3F8F #CBC13F #3FCB7B

square

#3F49CB #CB3F8F #CBC13F #3FCB7B

split-complementary

#3F49CB #CB7B3F #8FCB3F

monochromatic

#1F2471 #2C34A1 #3F49CB #6F77D8 #9FA4E5

Accessibility & contrast

On white

6.94

#3F49CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.03

#3F49CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F49CB

6.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F49CB	#FFFFFF	#000000	##FFFFFF
##3F49CB	1.00	6.94	3.03	6.94
#FFFFFF	6.94	1.00	21.00	1.00
#000000	3.03	21.00	1.00	21.00
##FFFFFF	6.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060CF

Deuteranopia (green-blind)

#0053C9

Tritanopia (blue-blind)

#006B83

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3f49cb;
/* rgb */ color: rgb(63, 73, 203);
/* oklch */ color: oklch(48.2% 0.198 272.9);

Tailwind

colors: {
  custom: {
    50: '#867cdc',
    500: '#3f49cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f49cb;
$custom-light: #867cdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f49cb",
  "rgb": {
    "r": 63,
    "g": 73,
    "b": 203
  },
  "hsl": {
    "h": 235.714,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.48171,
    "c": 0.19819,
    "h": 272.9
  },
  "luminance": 0.10134
}

Semantic roles & 50–950 ramp

primary

#3F49CB

secondary

#D1CD94

accent

#D647E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0915

muted

#7D7B83

Preview Lab

Preview with #3F49CB

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

Preview Lab → · Contrast checker → · Palette generator →