#3F73E8#3F73E8

#3F73E8 is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.4% C 0.186 H 263.6°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F73E8
RGB	rgb(63, 115, 232)
HSL	hsl(222, 79%, 58%)
HSV	hsv(222, 73%, 91%)
CMYK	cmyk(72.8%, 50.4%, 0%, 9%)
CIE-LAB	lab(50.85, 22.24, -64.32)
CIE-LCH	lch(50.85, 68.06, 289.08°)
OKLab	oklab(58.41% -0.0207 -0.185)
OKLCH	oklch(58.41% 0.186 263.6)
XYZ	xyz(22.7409, 19.1419, 78.8245)
Luminance	0.1914 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73E8 #E8B43F

analogous

#3FC8E8 #3F73E8 #5F3FE8

triadic

#3F73E8 #E83F73 #73E83F

tetradic

#3F73E8 #E83FC8 #E8B43F #3FE85F

square

#3F73E8 #E83FC8 #E8B43F #3FE85F

split-complementary

#3F73E8 #E85F3F #C8E83F

monochromatic

#123C9A #1952D1 #3F73E8 #769BEF #ACC3F5

Accessibility & contrast

On white

4.35

#3F73E8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#3F73E8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F73E8

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73E8	#FFFFFF	#000000	##000000
##3F73E8	1.00	4.35	4.83	4.83
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.83	21.00	1.00	1.00
##000000	4.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A81EC

Deuteranopia (green-blind)

#0072E6

Tritanopia (blue-blind)

#008FA3

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3f73e8;
/* rgb */ color: rgb(63, 115, 232);
/* oklch */ color: oklch(58.4% 0.186 263.6);

Tailwind

colors: {
  custom: {
    50: '#899af0',
    500: '#3f73e8',
    950: '#000000',
  },
}

SCSS

$custom: #3f73e8;
$custom-light: #899af0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73e8",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 232
  },
  "hsl": {
    "h": 221.538,
    "s": 78.605,
    "l": 57.843
  },
  "oklch": {
    "l": 0.58406,
    "c": 0.18611,
    "h": 263.6
  },
  "luminance": 0.19144
}

Semantic roles & 50–950 ramp

primary

#3F73E8

secondary

#E3CEA0

accent

#B933F5

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E17

muted

#7E7E85

Preview Lab

Preview with #3F73E8

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

Preview Lab → · Contrast checker → · Palette generator →