#3F78D2#3F78D2

#3F78D2 is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.0% C 0.151 H 259.2°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F78D2
RGB	rgb(63, 120, 210)
HSL	hsl(217, 62%, 54%)
HSV	hsv(217, 70%, 82%)
CMYK	cmyk(70%, 42.9%, 0%, 17.6%)
CIE-LAB	lab(50.85, 11.19, -51.91)
CIE-LCH	lch(50.85, 53.10, 282.16°)
OKLab	oklab(57.97% -0.0282 -0.1484)
OKLCH	oklch(57.97% 0.151 259.2)
XYZ	xyz(20.3950, 19.1407, 63.5799)
Luminance	0.1914 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78D2 #D2993F

analogous

#3FC1D2 #3F78D2 #4F3FD2

triadic

#3F78D2 #D23F78 #78D23F

tetradic

#3F78D2 #D23FC1 #D2993F #3FD24F

square

#3F78D2 #D23FC1 #D2993F #3FD24F

split-complementary

#3F78D2 #D24F3F #C1D23F

monochromatic

#1D417A #285BAC #3F78D2 #719BDE #A2BEE9

Accessibility & contrast

On white

4.35

#3F78D2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#3F78D2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78D2

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78D2	#FFFFFF	#000000	##000000
##3F78D2	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)

#4C80D5

Deuteranopia (green-blind)

#3373D0

Tritanopia (blue-blind)

#008D9B

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #3f78d2;
/* rgb */ color: rgb(63, 120, 210);
/* oklch */ color: oklch(58.0% 0.151 259.2);

Tailwind

colors: {
  custom: {
    50: '#859ee0',
    500: '#3f78d2',
    950: '#000000',
  },
}

SCSS

$custom: #3f78d2;
$custom-light: #859ee0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78d2",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 210
  },
  "hsl": {
    "h": 216.735,
    "s": 62.025,
    "l": 53.529
  },
  "oklch": {
    "l": 0.57966,
    "c": 0.15102,
    "h": 259.2
  },
  "luminance": 0.19143
}

Semantic roles & 50–950 ramp

primary

#3F78D2

secondary

#D6BD97

accent

#A643E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3F78D2

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

Preview Lab → · Contrast checker → · Palette generator →