#3F42CD#3F42CD

#3F42CD is a mid, highly saturated blue. Relative luminance 0.094; OKLCH L 47.2% C 0.209 H 274.0°. Best body text is #FFFFFF at 7.31:1 contrast (WCAG AA passes).

Color values

HEX	#3F42CD
RGB	rgb(63, 66, 205)
HSL	hsl(239, 59%, 53%)
HSV	hsv(239, 69%, 80%)
CMYK	cmyk(69.3%, 67.8%, 0%, 19.6%)
CIE-LAB	lab(36.67, 43.27, -72.03)
CIE-LCH	lch(36.67, 84.02, 301.00°)
OKLab	oklab(47.2% 0.0147 -0.2081)
OKLCH	oklch(47.2% 0.209 274)
XYZ	xyz(15.0139, 9.3595, 58.7611)
Luminance	0.0936 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 2.96

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F42CD #CDCA3F

analogous

#3F89CD #3F42CD #833FCD

triadic

#3F42CD #CD3F42 #42CD3F

tetradic

#3F42CD #CD3F89 #CDCA3F #3FCD83

square

#3F42CD #CD3F89 #CDCA3F #3FCD83

split-complementary

#3F42CD #CD833F #89CD3F

monochromatic

#1E2074 #2B2DA4 #3F42CD #7072DA #A0A2E6

Accessibility & contrast

On white

7.31

#3F42CD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.87

#3F42CD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F42CD

7.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F42CD	#FFFFFF	#000000	##FFFFFF
##3F42CD	1.00	7.31	2.87	7.31
#FFFFFF	7.31	1.00	21.00	1.00
#000000	2.87	21.00	1.00	21.00
##FFFFFF	7.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DD1

Deuteranopia (green-blind)

#0050CA

Tritanopia (blue-blind)

#006782

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f42cd;
/* rgb */ color: rgb(63, 66, 205);
/* oklch */ color: oklch(47.2% 0.209 274.0);

Tailwind

colors: {
  custom: {
    50: '#8777dd',
    500: '#3f42cd',
    950: '#000000',
  },
}

SCSS

$custom: #3f42cd;
$custom-light: #8777dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f42cd",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 205
  },
  "hsl": {
    "h": 238.732,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.47198,
    "c": 0.20865,
    "h": 274
  },
  "luminance": 0.09361
}

Semantic roles & 50–950 ramp

primary

#3F42CD

secondary

#D3D195

accent

#DF46E2

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F42CD

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

Preview Lab → · Contrast checker → · Palette generator →