#3F78D7#3F78D7

#3F78D7 is a mid, vivid blue. Relative luminance 0.194; OKLCH L 58.3% C 0.158 H 260.0°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#3F78D7
RGB	rgb(63, 120, 215)
HSL	hsl(218, 66%, 55%)
HSV	hsv(218, 71%, 84%)
CMYK	cmyk(70.7%, 44.2%, 0%, 15.7%)
CIE-LAB	lab(51.14, 12.99, -54.27)
CIE-LCH	lch(51.14, 55.80, 283.46°)
OKLab	oklab(58.29% -0.0273 -0.1553)
OKLCH	oklch(58.29% 0.158 260)
XYZ	xyz(21.0277, 19.3938, 66.9120)
Luminance	0.1940 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78D7 #D79E3F

analogous

#3FC4D7 #3F78D7 #523FD7

triadic

#3F78D7 #D73F78 #78D73F

tetradic

#3F78D7 #D73FC4 #D79E3F #3FD752

square

#3F78D7 #D73FC4 #D79E3F #3FD752

split-complementary

#3F78D7 #D7523F #C4D73F

monochromatic

#1B4181 #255BB3 #3F78D7 #729CE2 #A4BFEC

Accessibility & contrast

On white

4.30

#3F78D7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#3F78D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78D7

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78D7	#FFFFFF	#000000	##000000
##3F78D7	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4981DB

Deuteranopia (green-blind)

#2C73D5

Tritanopia (blue-blind)

#008E9D

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f78d7;
/* rgb */ color: rgb(63, 120, 215);
/* oklch */ color: oklch(58.3% 0.158 260.0);

Tailwind

colors: {
  custom: {
    50: '#869ee4',
    500: '#3f78d7',
    950: '#000000',
  },
}

SCSS

$custom: #3f78d7;
$custom-light: #869ee4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78d7",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 215
  },
  "hsl": {
    "h": 217.5,
    "s": 65.517,
    "l": 54.51
  },
  "oklch": {
    "l": 0.58288,
    "c": 0.15769,
    "h": 260
  },
  "luminance": 0.19396
}

Semantic roles & 50–950 ramp

primary

#3F78D7

secondary

#D9C199

accent

#A93FE8

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E15

muted

#7D7E84

Preview Lab

Preview with #3F78D7

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

Preview Lab → · Contrast checker → · Palette generator →