#3F43E2#3F43E2

#3F43E2 is a mid, highly saturated blue. Relative luminance 0.106; OKLCH L 49.3% C 0.233 H 272.8°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F43E2
RGB	rgb(63, 67, 226)
HSL	hsl(239, 74%, 57%)
HSV	hsv(239, 72%, 89%)
CMYK	cmyk(72.1%, 70.4%, 0%, 11.4%)
CIE-LAB	lab(38.83, 49.62, -80.54)
CIE-LCH	lch(38.83, 94.60, 301.64°)
OKLab	oklab(49.35% 0.0114 -0.233)
OKLCH	oklch(49.35% 0.233 272.8)
XYZ	xyz(17.7799, 10.5603, 73.0381)
Luminance	0.1056 (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

#3F43E2 #E2DE3F

analogous

#3F94E2 #3F43E2 #8D3FE2

triadic

#3F43E2 #E23F43 #43E23F

tetradic

#3F43E2 #E23F94 #E2DE3F #3FE28D

square

#3F43E2 #E23F94 #E2DE3F #3FE28D

split-complementary

#3F43E2 #E28D3F #94E23F

monochromatic

#161991 #1E22C6 #3F43E2 #7477EA #A9ABF2

Accessibility & contrast

On white

6.75

#3F43E2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#3F43E2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F43E2

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F43E2	#FFFFFF	#000000	##FFFFFF
##3F43E2	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063E7

Deuteranopia (green-blind)

#0054DF

Tritanopia (blue-blind)

#00708E

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f43e2;
/* rgb */ color: rgb(63, 67, 226);
/* oklch */ color: oklch(49.3% 0.233 272.8);

Tailwind

colors: {
  custom: {
    50: '#8b78ec',
    500: '#3f43e2',
    950: '#000000',
  },
}

SCSS

$custom: #3f43e2;
$custom-light: #8b78ec;
$custom-dark: #000000;

JSON

{
  "hex": "#3f43e2",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 226
  },
  "hsl": {
    "h": 238.528,
    "s": 73.756,
    "l": 56.667
  },
  "oklch": {
    "l": 0.49345,
    "c": 0.23328,
    "h": 272.8
  },
  "luminance": 0.10562
}

Semantic roles & 50–950 ramp

primary

#3F43E2

secondary

#E0DE9D

accent

#EC37F0

background

#F9F7FE

surface

#F2EDFD

border

#CCC8D5

text

#0E0916

muted

#7E7B84

Preview Lab

Preview with #3F43E2

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

Preview Lab → · Contrast checker → · Palette generator →