#3F43D7#3F43D7

#3F43D7 is a mid, highly saturated blue. Relative luminance 0.100; OKLCH L 48.3% C 0.220 H 273.3°. Best body text is #FFFFFF at 7.01:1 contrast (WCAG AA passes).

Color values

HEX	#3F43D7
RGB	rgb(63, 67, 215)
HSL	hsl(238, 66%, 55%)
HSV	hsv(238, 71%, 84%)
CMYK	cmyk(70.7%, 68.8%, 0%, 15.7%)
CIE-LAB	lab(37.80, 46.01, -75.94)
CIE-LCH	lch(37.80, 88.79, 301.21°)
OKLab	oklab(48.29% 0.0129 -0.2196)
OKLCH	oklch(48.29% 0.22 273.3)
XYZ	xyz(16.3187, 9.9758, 65.3423)
Luminance	0.0998 (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

#3F43D7 #D7D33F

analogous

#3F8FD7 #3F43D7 #873FD7

triadic

#3F43D7 #D73F43 #43D73F

tetradic

#3F43D7 #D73F8F #D7D33F #3FD787

square

#3F43D7 #D73F8F #D7D33F #3FD787

split-complementary

#3F43D7 #D7873F #8FD73F

monochromatic

#1B1E81 #2529B3 #3F43D7 #7275E2 #A4A6EC

Accessibility & contrast

On white

7.01

#3F43D7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

3.00

#3F43D7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F43D7

7.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43D7	#FFFFFF	#000000	##FFFFFF
##3F43D7	1.00	7.01	3.00	7.01
#FFFFFF	7.01	1.00	21.00	1.00
#000000	3.00	21.00	1.00	21.00
##FFFFFF	7.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0060DB

Deuteranopia (green-blind)

#0052D4

Tritanopia (blue-blind)

#006C88

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #3f43d7;
/* rgb */ color: rgb(63, 67, 215);
/* oklch */ color: oklch(48.3% 0.220 273.3);

Tailwind

colors: {
  custom: {
    50: '#8978e5',
    500: '#3f43d7',
    950: '#000000',
  },
}

SCSS

$custom: #3f43d7;
$custom-light: #8978e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43d7",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 215
  },
  "hsl": {
    "h": 238.421,
    "s": 65.517,
    "l": 54.51
  },
  "oklch": {
    "l": 0.48292,
    "c": 0.21995,
    "h": 273.3
  },
  "luminance": 0.09977
}

Semantic roles & 50–950 ramp

primary

#3F43D7

secondary

#D9D799

accent

#E43FE8

background

#F9F7FE

surface

#F2EDFC

border

#CCC8D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3F43D7

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

Preview Lab → · Contrast checker → · Palette generator →