#3F71C8#3F71C8

#3F71C8 is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.8% C 0.146 H 260.7°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#3F71C8
RGB	rgb(63, 113, 200)
HSL	hsl(218, 55%, 52%)
HSV	hsv(218, 69%, 78%)
CMYK	cmyk(68.5%, 43.5%, 0%, 21.6%)
CIE-LAB	lab(48.30, 11.95, -50.27)
CIE-LCH	lch(48.30, 51.67, 283.37°)
OKLab	oklab(55.81% -0.0236 -0.1437)
OKLCH	oklch(55.81% 0.146 260.7)
XYZ	xyz(18.3766, 17.0353, 56.9521)
Luminance	0.1704 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71C8 #C8963F

analogous

#3FB6C8 #3F71C8 #523FC8

triadic

#3F71C8 #C83F71 #71C83F

tetradic

#3F71C8 #C83FB6 #C8963F #3FC852

square

#3F71C8 #C83FB6 #C8963F #3FC852

split-complementary

#3F71C8 #C8523F #B6C83F

monochromatic

#1F3C6D #2D569D #3F71C8 #6F94D6 #9EB7E3

Accessibility & contrast

On white

4.76

#3F71C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#3F71C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71C8

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71C8	#FFFFFF	#000000	##FFFFFF
##3F71C8	1.00	4.76	4.41	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4779CB

Deuteranopia (green-blind)

#2F6DC6

Tritanopia (blue-blind)

#008593

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3f71c8;
/* rgb */ color: rgb(63, 113, 200);
/* oklch */ color: oklch(55.8% 0.146 260.7);

Tailwind

colors: {
  custom: {
    50: '#8399d9',
    500: '#3f71c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f71c8;
$custom-light: #8399d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71c8",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 200
  },
  "hsl": {
    "h": 218.102,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.5581,
    "c": 0.1456,
    "h": 260.7
  },
  "luminance": 0.17037
}

Semantic roles & 50–950 ramp

primary

#3F71C8

secondary

#D0BA93

accent

#A849DF

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3F71C8

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

Preview Lab → · Contrast checker → · Palette generator →