#3F42D5#3F42D5

#3F42D5 is a mid, highly saturated blue. Relative luminance 0.098; OKLCH L 47.9% C 0.219 H 273.6°. Best body text is #FFFFFF at 7.12:1 contrast (WCAG AA passes).

Color values

HEX	#3F42D5
RGB	rgb(63, 66, 213)
HSL	hsl(239, 64%, 54%)
HSV	hsv(239, 70%, 84%)
CMYK	cmyk(70.4%, 69%, 0%, 16.5%)
CIE-LAB	lab(37.40, 45.93, -75.44)
CIE-LCH	lch(37.40, 88.33, 301.33°)
OKLab	oklab(47.95% 0.0137 -0.2181)
OKLCH	oklch(47.95% 0.219 273.6)
XYZ	xyz(16.0043, 9.7557, 63.9775)
Luminance	0.0976 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue (survey)

#0343DF

ΔE00 3.15

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F42D5 #D5D23F

analogous

#3F8DD5 #3F42D5 #873FD5

triadic

#3F42D5 #D53F42 #42D53F

tetradic

#3F42D5 #D53F8D #D5D23F #3FD587

square

#3F42D5 #D53F8D #D5D23F #3FD587

split-complementary

#3F42D5 #D5873F #8DD53F

monochromatic

#1C1E7E #2729B0 #3F42D5 #7173E0 #A3A5EB

Accessibility & contrast

On white

7.12

#3F42D5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.95

#3F42D5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F42D5

7.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F42D5	#FFFFFF	#000000	##FFFFFF
##3F42D5	1.00	7.12	2.95	7.12
#FFFFFF	7.12	1.00	21.00	1.00
#000000	2.95	21.00	1.00	21.00
##FFFFFF	7.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FD9

Deuteranopia (green-blind)

#0051D2

Tritanopia (blue-blind)

#006A86

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f42d5;
/* rgb */ color: rgb(63, 66, 213);
/* oklch */ color: oklch(47.9% 0.219 273.6);

Tailwind

colors: {
  custom: {
    50: '#8977e3',
    500: '#3f42d5',
    950: '#000000',
  },
}

SCSS

$custom: #3f42d5;
$custom-light: #8977e3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f42d5",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 213
  },
  "hsl": {
    "h": 238.8,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.47949,
    "c": 0.21855,
    "h": 273.6
  },
  "luminance": 0.09757
}

Semantic roles & 50–950 ramp

primary

#3F42D5

secondary

#D8D798

accent

#E441E7

background

#F9F7FE

surface

#F1EDFC

border

#CBC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F42D5

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

Preview Lab → · Contrast checker → · Palette generator →