#3F78D9#3F78D9

#3F78D9 is a mid, vivid blue. Relative luminance 0.195; OKLCH L 58.4% C 0.160 H 260.3°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F78D9
RGB	rgb(63, 120, 217)
HSL	hsl(218, 67%, 55%)
HSV	hsv(218, 71%, 85%)
CMYK	cmyk(71%, 44.7%, 0%, 14.9%)
CIE-LAB	lab(51.26, 13.71, -55.21)
CIE-LCH	lch(51.26, 56.89, 283.94°)
OKLab	oklab(58.42% -0.027 -0.1581)
OKLCH	oklch(58.42% 0.16 260.3)
XYZ	xyz(21.2862, 19.4972, 68.2737)
Luminance	0.1950 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78D9 #D9A03F

analogous

#3FC5D9 #3F78D9 #533FD9

triadic

#3F78D9 #D93F78 #78D93F

tetradic

#3F78D9 #D93FC5 #D9A03F #3FD953

square

#3F78D9 #D93FC5 #D9A03F #3FD953

split-complementary

#3F78D9 #D9533F #C5D93F

monochromatic

#1A4184 #245AB7 #3F78D9 #729CE3 #A5C0ED

Accessibility & contrast

On white

4.29

#3F78D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#3F78D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78D9

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78D9	#FFFFFF	#000000	##000000
##3F78D9	1.00	4.29	4.90	4.90
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4782DD

Deuteranopia (green-blind)

#2974D7

Tritanopia (blue-blind)

#008F9E

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3f78d9;
/* rgb */ color: rgb(63, 120, 217);
/* oklch */ color: oklch(58.4% 0.160 260.3);

Tailwind

colors: {
  custom: {
    50: '#869ee5',
    500: '#3f78d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f78d9;
$custom-light: #869ee5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78d9",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 217
  },
  "hsl": {
    "h": 217.792,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.58418,
    "c": 0.16035,
    "h": 260.3
  },
  "luminance": 0.19499
}

Semantic roles & 50–950 ramp

primary

#3F78D9

secondary

#DAC29A

accent

#AA3EEA

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #3F78D9

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

Preview Lab → · Contrast checker → · Palette generator →