#3F79D3#3F79D3

#3F79D3 is a mid, vivid blue. Relative luminance 0.194; OKLCH L 58.2% C 0.151 H 259.0°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#3F79D3
RGB	rgb(63, 121, 211)
HSL	hsl(216, 63%, 54%)
HSV	hsv(216, 70%, 83%)
CMYK	cmyk(70.1%, 42.7%, 0%, 17.3%)
CIE-LAB	lab(51.19, 10.93, -51.93)
CIE-LCH	lch(51.19, 53.07, 281.88°)
OKLab	oklab(58.25% -0.029 -0.1484)
OKLCH	oklch(58.25% 0.151 259)
XYZ	xyz(20.6409, 19.4325, 64.2784)
Luminance	0.1943 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F79D3 #D3993F

analogous

#3FC3D3 #3F79D3 #4F3FD3

triadic

#3F79D3 #D33F79 #79D33F

tetradic

#3F79D3 #D33FC3 #D3993F #3FD34F

square

#3F79D3 #D33FC3 #D3993F #3FD34F

split-complementary

#3F79D3 #D34F3F #C3D33F

monochromatic

#1C427B #285CAD #3F79D3 #719CDE #A3BEEA

Accessibility & contrast

On white

4.30

#3F79D3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#3F79D3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F79D3

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F79D3	#FFFFFF	#000000	##000000
##3F79D3	1.00	4.30	4.89	4.89
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E81D6

Deuteranopia (green-blind)

#3474D1

Tritanopia (blue-blind)

#008E9C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f79d3;
/* rgb */ color: rgb(63, 121, 211);
/* oklch */ color: oklch(58.2% 0.151 259.0);

Tailwind

colors: {
  custom: {
    50: '#859fe1',
    500: '#3f79d3',
    950: '#000000',
  },
}

SCSS

$custom: #3f79d3;
$custom-light: #859fe1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f79d3",
  "rgb": {
    "r": 63,
    "g": 121,
    "b": 211
  },
  "hsl": {
    "h": 216.486,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.58246,
    "c": 0.15122,
    "h": 259
  },
  "luminance": 0.19435
}

Semantic roles & 50–950 ramp

primary

#3F79D3

secondary

#D7BE97

accent

#A642E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F79D3

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

Preview Lab → · Contrast checker → · Palette generator →