#3F42D0#3F42D0

#3F42D0 is a mid, highly saturated blue. Relative luminance 0.095; OKLCH L 47.5% C 0.212 H 273.9°. Best body text is #FFFFFF at 7.24:1 contrast (WCAG AA passes).

Color values

HEX	#3F42D0
RGB	rgb(63, 66, 208)
HSL	hsl(239, 61%, 53%)
HSV	hsv(239, 70%, 82%)
CMYK	cmyk(69.7%, 68.3%, 0%, 18.4%)
CIE-LAB	lab(36.94, 44.27, -73.31)
CIE-LCH	lch(36.94, 85.64, 301.12°)
OKLab	oklab(47.48% 0.0143 -0.2119)
OKLCH	oklch(47.48% 0.212 273.9)
XYZ	xyz(15.3795, 9.5058, 60.6866)
Luminance	0.0951 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.16

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F42D0 #D0CD3F

analogous

#3F8AD0 #3F42D0 #853FD0

triadic

#3F42D0 #D03F42 #42D03F

tetradic

#3F42D0 #D03F8A #D0CD3F #3FD085

square

#3F42D0 #D03F8A #D0CD3F #3FD085

split-complementary

#3F42D0 #D0853F #8AD03F

monochromatic

#1D1F77 #292CA9 #3F42D0 #7072DC #A1A3E8

Accessibility & contrast

On white

7.24

#3F42D0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.90

#3F42D0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F42D0

7.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F42D0	#FFFFFF	#000000	##FFFFFF
##3F42D0	1.00	7.24	2.90	7.24
#FFFFFF	7.24	1.00	21.00	1.00
#000000	2.90	21.00	1.00	21.00
##FFFFFF	7.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ED4

Deuteranopia (green-blind)

#0050CD

Tritanopia (blue-blind)

#006984

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f42d0;
/* rgb */ color: rgb(63, 66, 208);
/* oklch */ color: oklch(47.5% 0.212 273.9);

Tailwind

colors: {
  custom: {
    50: '#8877e0',
    500: '#3f42d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f42d0;
$custom-light: #8877e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f42d0",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 208
  },
  "hsl": {
    "h": 238.759,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.47478,
    "c": 0.21238,
    "h": 273.9
  },
  "luminance": 0.09507
}

Semantic roles & 50–950 ramp

primary

#3F42D0

secondary

#D5D396

accent

#E044E4

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F42D0

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

Preview Lab → · Contrast checker → · Palette generator →