#3F42CA#3F42CA

#3F42CA is a mid, highly saturated blue. Relative luminance 0.092; OKLCH L 46.9% C 0.205 H 274.2°. Best body text is #FFFFFF at 7.39:1 contrast (WCAG AA passes).

Color values

HEX	#3F42CA
RGB	rgb(63, 66, 202)
HSL	hsl(239, 57%, 52%)
HSV	hsv(239, 69%, 79%)
CMYK	cmyk(68.8%, 67.3%, 0%, 20.8%)
CIE-LAB	lab(36.40, 42.27, -70.73)
CIE-LCH	lch(36.40, 82.39, 300.86°)
OKLab	oklab(46.92% 0.015 -0.2043)
OKLCH	oklch(46.92% 0.205 274.2)
XYZ	xyz(14.6552, 9.2161, 56.8722)
Luminance	0.0922 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 2.80

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F42CA #CAC73F

analogous

#3F88CA #3F42CA #823FCA

triadic

#3F42CA #CA3F42 #42CA3F

tetradic

#3F42CA #CA3F88 #CAC73F #3FCA82

square

#3F42CA #CA3F88 #CAC73F #3FCA82

split-complementary

#3F42CA #CA823F #88CA3F

monochromatic

#1F2170 #2C2FA0 #3F42CA #6F71D7 #9FA0E4

Accessibility & contrast

On white

7.39

#3F42CA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#3F42CA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F42CA

7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F42CA	#FFFFFF	#000000	##FFFFFF
##3F42CA	1.00	7.39	2.84	7.39
#FFFFFF	7.39	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CCE

Deuteranopia (green-blind)

#004FC7

Tritanopia (blue-blind)

#006680

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f42ca;
/* rgb */ color: rgb(63, 66, 202);
/* oklch */ color: oklch(46.9% 0.205 274.2);

Tailwind

colors: {
  custom: {
    50: '#8677db',
    500: '#3f42ca',
    950: '#000000',
  },
}

SCSS

$custom: #3f42ca;
$custom-light: #8677db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f42ca",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 202
  },
  "hsl": {
    "h": 238.705,
    "s": 56.735,
    "l": 51.961
  },
  "oklch": {
    "l": 0.4692,
    "c": 0.20488,
    "h": 274.2
  },
  "luminance": 0.09217
}

Semantic roles & 50–950 ramp

primary

#3F42CA

secondary

#D1D094

accent

#DD48E0

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F42CA

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

Preview Lab → · Contrast checker → · Palette generator →