#3F42D2#3F42D2

#3F42D2 is a mid, highly saturated blue. Relative luminance 0.096; OKLCH L 47.7% C 0.215 H 273.8°. Best body text is #FFFFFF at 7.19:1 contrast (WCAG AA passes).

Color values

HEX	#3F42D2
RGB	rgb(63, 66, 210)
HSL	hsl(239, 62%, 54%)
HSV	hsv(239, 70%, 82%)
CMYK	cmyk(70%, 68.6%, 0%, 17.6%)
CIE-LAB	lab(37.12, 44.93, -74.17)
CIE-LCH	lch(37.12, 86.72, 301.21°)
OKLab	oklab(47.67% 0.0141 -0.2144)
OKLCH	oklch(47.67% 0.215 273.8)
XYZ	xyz(15.6271, 9.6048, 61.9906)
Luminance	0.0961 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F42D2 #D2CF3F

analogous

#3F8BD2 #3F42D2 #863FD2

triadic

#3F42D2 #D23F42 #42D23F

tetradic

#3F42D2 #D23F8B #D2CF3F #3FD286

square

#3F42D2 #D23F8B #D2CF3F #3FD286

split-complementary

#3F42D2 #D2863F #8BD23F

monochromatic

#1D1F7A #282BAC #3F42D2 #7173DE #A2A4E9

Accessibility & contrast

On white

7.19

#3F42D2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#3F42D2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F42D2

7.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F42D2	#FFFFFF	#000000	##FFFFFF
##3F42D2	1.00	7.19	2.92	7.19
#FFFFFF	7.19	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ED6

Deuteranopia (green-blind)

#0050CF

Tritanopia (blue-blind)

#006985

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #3f42d2;
/* rgb */ color: rgb(63, 66, 210);
/* oklch */ color: oklch(47.7% 0.215 273.8);

Tailwind

colors: {
  custom: {
    50: '#8877e1',
    500: '#3f42d2',
    950: '#000000',
  },
}

SCSS

$custom: #3f42d2;
$custom-light: #8877e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f42d2",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 210
  },
  "hsl": {
    "h": 238.776,
    "s": 62.025,
    "l": 53.529
  },
  "oklch": {
    "l": 0.47666,
    "c": 0.21485,
    "h": 273.8
  },
  "luminance": 0.09606
}

Semantic roles & 50–950 ramp

primary

#3F42D2

secondary

#D6D597

accent

#E243E5

background

#F9F7FE

surface

#F1EDFC

border

#CBC8D5

text

#0D0915

muted

#7E7B84

Preview Lab

Preview with #3F42D2

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

Preview Lab → · Contrast checker → · Palette generator →