#3F73D2#3F73D2

#3F73D2 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 56.9% C 0.157 H 261.3°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F73D2
RGB	rgb(63, 115, 210)
HSL	hsl(219, 62%, 54%)
HSV	hsv(219, 70%, 82%)
CMYK	cmyk(70%, 45.2%, 0%, 17.6%)
CIE-LAB	lab(49.46, 14.30, -54.14)
CIE-LCH	lch(49.46, 55.99, 284.79°)
OKLab	oklab(56.89% -0.0237 -0.155)
OKLCH	oklch(56.89% 0.157 261.3)
XYZ	xyz(19.8093, 17.9693, 63.3847)
Luminance	0.1797 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F73D2 #D29E3F

analogous

#3FBCD2 #3F73D2 #543FD2

triadic

#3F73D2 #D23F73 #73D23F

tetradic

#3F73D2 #D23FBC #D29E3F #3FD254

square

#3F73D2 #D23FBC #D29E3F #3FD254

split-complementary

#3F73D2 #D2543F #BCD23F

monochromatic

#1D3E7A #2857AC #3F73D2 #7197DE #A2BBE9

Accessibility & contrast

On white

4.57

#3F73D2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#3F73D2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F73D2

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F73D2	#FFFFFF	#000000	##000000
##3F73D2	1.00	4.57	4.59	4.59
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#437DD6

Deuteranopia (green-blind)

#256FD0

Tritanopia (blue-blind)

#008998

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f73d2;
/* rgb */ color: rgb(63, 115, 210);
/* oklch */ color: oklch(56.9% 0.157 261.3);

Tailwind

colors: {
  custom: {
    50: '#859ae0',
    500: '#3f73d2',
    950: '#000000',
  },
}

SCSS

$custom: #3f73d2;
$custom-light: #859ae0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f73d2",
  "rgb": {
    "r": 63,
    "g": 115,
    "b": 210
  },
  "hsl": {
    "h": 218.776,
    "s": 62.025,
    "l": 53.529
  },
  "oklch": {
    "l": 0.56892,
    "c": 0.15679,
    "h": 261.3
  },
  "luminance": 0.17971
}

Semantic roles & 50–950 ramp

primary

#3F73D2

secondary

#D6C097

accent

#AC43E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F73D2

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

Preview Lab → · Contrast checker → · Palette generator →