#3F71CF#3F71CF

#3F71CF is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.3% C 0.155 H 261.7°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3F71CF
RGB	rgb(63, 113, 207)
HSL	hsl(219, 60%, 53%)
HSV	hsv(219, 70%, 81%)
CMYK	cmyk(69.6%, 45.4%, 0%, 18.8%)
CIE-LAB	lab(48.72, 14.47, -53.61)
CIE-LCH	lch(48.72, 55.52, 285.10°)
OKLab	oklab(56.27% -0.0224 -0.1535)
OKLCH	oklch(56.27% 0.155 261.7)
XYZ	xyz(19.2135, 17.3700, 61.3596)
Luminance	0.1737 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71CF #CF9D3F

analogous

#3FB9CF #3F71CF #553FCF

triadic

#3F71CF #CF3F71 #71CF3F

tetradic

#3F71CF #CF3FB9 #CF9D3F #3FCF55

square

#3F71CF #CF3FB9 #CF9D3F #3FCF55

split-complementary

#3F71CF #CF553F #B9CF3F

monochromatic

#1E3C76 #2A55A7 #3F71CF #7095DB #A1B9E7

Accessibility & contrast

On white

4.69

#3F71CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#3F71CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71CF

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71CF	#FFFFFF	#000000	##FFFFFF
##3F71CF	1.00	4.69	4.47	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#417BD3

Deuteranopia (green-blind)

#256ECD

Tritanopia (blue-blind)

#008796

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3f71cf;
/* rgb */ color: rgb(63, 113, 207);
/* oklch */ color: oklch(56.3% 0.155 261.7);

Tailwind

colors: {
  custom: {
    50: '#8499de',
    500: '#3f71cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f71cf;
$custom-light: #8499de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71cf",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 207
  },
  "hsl": {
    "h": 219.167,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.56267,
    "c": 0.1551,
    "h": 261.7
  },
  "luminance": 0.17372
}

Semantic roles & 50–950 ramp

primary

#3F71CF

secondary

#D4BE96

accent

#AC45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F71CF

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

Preview Lab → · Contrast checker → · Palette generator →