#3F78D5#3F78D5

#3F78D5 is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.2% C 0.155 H 259.7°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#3F78D5
RGB	rgb(63, 120, 213)
HSL	hsl(217, 64%, 54%)
HSV	hsv(217, 70%, 84%)
CMYK	cmyk(70.4%, 43.7%, 0%, 16.5%)
CIE-LAB	lab(51.03, 12.27, -53.33)
CIE-LCH	lch(51.03, 54.72, 282.95°)
OKLab	oklab(58.16% -0.0277 -0.1525)
OKLCH	oklch(58.16% 0.155 259.7)
XYZ	xyz(20.7723, 19.2916, 65.5668)
Luminance	0.1929 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78D5 #D59C3F

analogous

#3FC3D5 #3F78D5 #513FD5

triadic

#3F78D5 #D53F78 #78D53F

tetradic

#3F78D5 #D53FC3 #D59C3F #3FD551

square

#3F78D5 #D53FC3 #D59C3F #3FD551

split-complementary

#3F78D5 #D5513F #C3D53F

monochromatic

#1C417E #275BB0 #3F78D5 #719BE0 #A3BFEB

Accessibility & contrast

On white

4.32

#3F78D5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#3F78D5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78D5

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78D5	#FFFFFF	#000000	##000000
##3F78D5	1.00	4.32	4.86	4.86
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.86	21.00	1.00	1.00
##000000	4.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A81D9

Deuteranopia (green-blind)

#2F73D3

Tritanopia (blue-blind)

#008E9C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f78d5;
/* rgb */ color: rgb(63, 120, 213);
/* oklch */ color: oklch(58.2% 0.155 259.7);

Tailwind

colors: {
  custom: {
    50: '#859ee2',
    500: '#3f78d5',
    950: '#000000',
  },
}

SCSS

$custom: #3f78d5;
$custom-light: #859ee2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78d5",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 213
  },
  "hsl": {
    "h": 217.2,
    "s": 64.103,
    "l": 54.118
  },
  "oklch": {
    "l": 0.58158,
    "c": 0.15502,
    "h": 259.7
  },
  "luminance": 0.19294
}

Semantic roles & 50–950 ramp

primary

#3F78D5

secondary

#D8C098

accent

#A841E7

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F78D5

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

Preview Lab → · Contrast checker → · Palette generator →