#3F79D1#3F79D1

#3F79D1 is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.1% C 0.149 H 258.6°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#3F79D1
RGB	rgb(63, 121, 209)
HSL	hsl(216, 61%, 53%)
HSV	hsv(216, 70%, 82%)
CMYK	cmyk(69.9%, 42.1%, 0%, 18%)
CIE-LAB	lab(51.07, 10.21, -50.98)
CIE-LCH	lch(51.07, 51.99, 281.33°)
OKLab	oklab(58.12% -0.0294 -0.1456)
OKLCH	oklch(58.12% 0.149 258.6)
XYZ	xyz(20.3917, 19.3328, 62.9662)
Luminance	0.1933 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F79D1 #D1973F

analogous

#3FC2D1 #3F79D1 #4E3FD1

triadic

#3F79D1 #D13F79 #79D13F

tetradic

#3F79D1 #D13FC2 #D1973F #3FD14E

square

#3F79D1 #D13FC2 #D1973F #3FD14E

split-complementary

#3F79D1 #D14E3F #C2D13F

monochromatic

#1D4179 #295CAA #3F79D1 #709BDD #A2BEE9

Accessibility & contrast

On white

4.31

#3F79D1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#3F79D1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F79D1

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F79D1	#FFFFFF	#000000	##000000
##3F79D1	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F81D4

Deuteranopia (green-blind)

#3673CF

Tritanopia (blue-blind)

#008D9B

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f79d1;
/* rgb */ color: rgb(63, 121, 209);
/* oklch */ color: oklch(58.1% 0.149 258.6);

Tailwind

colors: {
  custom: {
    50: '#859fdf',
    500: '#3f79d1',
    950: '#000000',
  },
}

SCSS

$custom: #3f79d1;
$custom-light: #859fdf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f79d1",
  "rgb": {
    "r": 63,
    "g": 121,
    "b": 209
  },
  "hsl": {
    "h": 216.164,
    "s": 61.345,
    "l": 53.333
  },
  "oklch": {
    "l": 0.5812,
    "c": 0.14856,
    "h": 258.6
  },
  "luminance": 0.19335
}

Semantic roles & 50–950 ramp

primary

#3F79D1

secondary

#D5BC97

accent

#A443E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F79D1

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

Preview Lab → · Contrast checker → · Palette generator →