#3F48CB#3F48CB

#3F48CB is a mid, vivid blue. Relative luminance 0.100; OKLCH L 48.0% C 0.199 H 273.1°. Best body text is #FFFFFF at 7.00:1 contrast (WCAG AA passes).

Color values

HEX	#3F48CB
RGB	rgb(63, 72, 203)
HSL	hsl(236, 57%, 52%)
HSV	hsv(236, 69%, 80%)
CMYK	cmyk(69%, 64.5%, 0%, 20.4%)
CIE-LAB	lab(37.85, 38.96, -68.93)
CIE-LCH	lch(37.85, 79.18, 299.48°)
OKLab	oklab(48% 0.0109 -0.1991)
OKLCH	oklch(48% 0.199 273.1)
XYZ	xyz(15.1431, 10.0018, 57.6208)
Luminance	0.1000 (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

#3F48CB #CBC23F

analogous

#3F8ECB #3F48CB #7C3FCB

triadic

#3F48CB #CB3F48 #48CB3F

tetradic

#3F48CB #CB3F8E #CBC23F #3FCB7C

square

#3F48CB #CB3F8E #CBC23F #3FCB7C

split-complementary

#3F48CB #CB7C3F #8ECB3F

monochromatic

#1F2471 #2C33A1 #3F48CB #6F76D8 #9FA4E5

Accessibility & contrast

On white

7.00

#3F48CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

3.00

#3F48CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F48CB

7.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F48CB	#FFFFFF	#000000	##FFFFFF
##3F48CB	1.00	7.00	3.00	7.00
#FFFFFF	7.00	1.00	21.00	1.00
#000000	3.00	21.00	1.00	21.00
##FFFFFF	7.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060CF

Deuteranopia (green-blind)

#0053C8

Tritanopia (blue-blind)

#006A83

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f48cb;
/* rgb */ color: rgb(63, 72, 203);
/* oklch */ color: oklch(48.0% 0.199 273.1);

Tailwind

colors: {
  custom: {
    50: '#867bdc',
    500: '#3f48cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f48cb;
$custom-light: #867bdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f48cb",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 203
  },
  "hsl": {
    "h": 236.143,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.48,
    "c": 0.19936,
    "h": 273.1
  },
  "luminance": 0.10003
}

Semantic roles & 50–950 ramp

primary

#3F48CB

secondary

#D1CE94

accent

#D747E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0915

muted

#7D7B83

Preview Lab

Preview with #3F48CB

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

Preview Lab → · Contrast checker → · Palette generator →