#3F42CF#3F42CF

#3F42CF is a mid, highly saturated blue. Relative luminance 0.095; OKLCH L 47.4% C 0.211 H 273.9°. Best body text is #FFFFFF at 7.26:1 contrast (WCAG AA passes).

Color values

HEX	#3F42CF
RGB	rgb(63, 66, 207)
HSL	hsl(239, 60%, 53%)
HSV	hsv(239, 70%, 81%)
CMYK	cmyk(69.6%, 68.1%, 0%, 18.8%)
CIE-LAB	lab(36.85, 43.94, -72.89)
CIE-LCH	lch(36.85, 85.11, 301.08°)
OKLab	oklab(47.39% 0.0144 -0.2106)
OKLCH	oklch(47.39% 0.211 273.9)
XYZ	xyz(15.2568, 9.4567, 60.0407)
Luminance	0.0946 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.09

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F42CF #CFCC3F

analogous

#3F8ACF #3F42CF #843FCF

triadic

#3F42CF #CF3F42 #42CF3F

tetradic

#3F42CF #CF3F8A #CFCC3F #3FCF84

square

#3F42CF #CF3F8A #CFCC3F #3FCF84

split-complementary

#3F42CF #CF843F #8ACF3F

monochromatic

#1E1F76 #2A2CA7 #3F42CF #7072DB #A1A2E7

Accessibility & contrast

On white

7.26

#3F42CF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#3F42CF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F42CF

7.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F42CF	#FFFFFF	#000000	##FFFFFF
##3F42CF	1.00	7.26	2.89	7.26
#FFFFFF	7.26	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DD3

Deuteranopia (green-blind)

#0050CC

Tritanopia (blue-blind)

#006883

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f42cf;
/* rgb */ color: rgb(63, 66, 207);
/* oklch */ color: oklch(47.4% 0.211 273.9);

Tailwind

colors: {
  custom: {
    50: '#8777df',
    500: '#3f42cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f42cf;
$custom-light: #8777df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f42cf",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 207
  },
  "hsl": {
    "h": 238.75,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.47385,
    "c": 0.21113,
    "h": 273.9
  },
  "luminance": 0.09458
}

Semantic roles & 50–950 ramp

primary

#3F42CF

secondary

#D4D396

accent

#E045E3

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F42CF

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

Preview Lab → · Contrast checker → · Palette generator →