#3F71D0#3F71D0

#3F71D0 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.3% C 0.156 H 261.8°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F71D0
RGB	rgb(63, 113, 208)
HSL	hsl(219, 61%, 53%)
HSV	hsv(219, 70%, 82%)
CMYK	cmyk(69.7%, 45.7%, 0%, 18.4%)
CIE-LAB	lab(48.78, 14.83, -54.08)
CIE-LCH	lch(48.78, 56.07, 285.33°)
OKLab	oklab(56.33% -0.0222 -0.1549)
OKLCH	oklch(56.33% 0.156 261.8)
XYZ	xyz(19.3361, 17.4191, 62.0055)
Luminance	0.1742 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71D0 #D09E3F

analogous

#3FBAD0 #3F71D0 #553FD0

triadic

#3F71D0 #D03F71 #71D03F

tetradic

#3F71D0 #D03FBA #D09E3F #3FD055

square

#3F71D0 #D03FBA #D09E3F #3FD055

split-complementary

#3F71D0 #D0553F #BAD03F

monochromatic

#1D3C77 #2955A9 #3F71D0 #7095DC #A1BAE8

Accessibility & contrast

On white

4.68

#3F71D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#3F71D0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71D0

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71D0	#FFFFFF	#000000	##FFFFFF
##3F71D0	1.00	4.68	4.48	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#417BD4

Deuteranopia (green-blind)

#236ECE

Tritanopia (blue-blind)

#008796

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f71d0;
/* rgb */ color: rgb(63, 113, 208);
/* oklch */ color: oklch(56.3% 0.156 261.8);

Tailwind

colors: {
  custom: {
    50: '#8599df',
    500: '#3f71d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f71d0;
$custom-light: #8599df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71d0",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 208
  },
  "hsl": {
    "h": 219.31,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.56334,
    "c": 0.15645,
    "h": 261.8
  },
  "luminance": 0.17421
}

Semantic roles & 50–950 ramp

primary

#3F71D0

secondary

#D5BF96

accent

#AD44E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F71D0

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

Preview Lab → · Contrast checker → · Palette generator →