#3F42CE#3F42CE

#3F42CE is a mid, highly saturated blue. Relative luminance 0.094; OKLCH L 47.3% C 0.210 H 274.0°. Best body text is #FFFFFF at 7.29:1 contrast (WCAG AA passes).

Color values

HEX	#3F42CE
RGB	rgb(63, 66, 206)
HSL	hsl(239, 59%, 53%)
HSV	hsv(239, 69%, 81%)
CMYK	cmyk(69.4%, 68%, 0%, 19.2%)
CIE-LAB	lab(36.76, 43.60, -72.46)
CIE-LCH	lch(36.76, 84.56, 301.04°)
OKLab	oklab(47.29% 0.0146 -0.2094)
OKLCH	oklch(47.29% 0.21 274)
XYZ	xyz(15.1350, 9.4080, 59.3989)
Luminance	0.0941 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 3.02

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F42CE #CECB3F

analogous

#3F8ACE #3F42CE #833FCE

triadic

#3F42CE #CE3F42 #42CE3F

tetradic

#3F42CE #CE3F8A #CECB3F #3FCE83

square

#3F42CE #CE3F8A #CECB3F #3FCE83

split-complementary

#3F42CE #CE833F #8ACE3F

monochromatic

#1E2075 #2A2DA6 #3F42CE #7072DA #A1A2E7

Accessibility & contrast

On white

7.29

#3F42CE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#3F42CE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F42CE

7.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F42CE	#FFFFFF	#000000	##FFFFFF
##3F42CE	1.00	7.29	2.88	7.29
#FFFFFF	7.29	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DD2

Deuteranopia (green-blind)

#0050CB

Tritanopia (blue-blind)

#006883

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3f42ce;
/* rgb */ color: rgb(63, 66, 206);
/* oklch */ color: oklch(47.3% 0.210 274.0);

Tailwind

colors: {
  custom: {
    50: '#8777de',
    500: '#3f42ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f42ce;
$custom-light: #8777de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f42ce",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 206
  },
  "hsl": {
    "h": 238.741,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.47291,
    "c": 0.2099,
    "h": 274
  },
  "luminance": 0.09409
}

Semantic roles & 50–950 ramp

primary

#3F42CE

secondary

#D3D295

accent

#DF45E3

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0915

muted

#7E7B83

Preview Lab

Preview with #3F42CE

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

Preview Lab → · Contrast checker → · Palette generator →