#3F71BF#3F71BF

#3F71BF is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.2% C 0.133 H 259.0°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F71BF
RGB	rgb(63, 113, 191)
HSL	hsl(217, 50%, 50%)
HSV	hsv(217, 67%, 75%)
CMYK	cmyk(67%, 40.8%, 0%, 25.1%)
CIE-LAB	lab(47.79, 8.72, -45.93)
CIE-LCH	lch(47.79, 46.75, 280.75°)
OKLab	oklab(55.24% -0.0254 -0.1309)
OKLCH	oklch(55.24% 0.133 259)
XYZ	xyz(17.3556, 16.6269, 51.5748)
Luminance	0.1663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F71BF #BF8D3F

analogous

#3FB1BF #3F71BF #4D3FBF

triadic

#3F71BF #BF3F71 #71BF3F

tetradic

#3F71BF #BF3FB1 #BF8D3F #3FBF4D

square

#3F71BF #BF3FB1 #BF8D3F #3FBF4D

split-complementary

#3F71BF #BF4D3F #B1BF3F

monochromatic

#213B63 #305691 #3F71BF #6D93CF #9BB5DE

Accessibility & contrast

On white

4.85

#3F71BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#3F71BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F71BF

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F71BF	#FFFFFF	#000000	##FFFFFF
##3F71BF	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D78C2

Deuteranopia (green-blind)

#396CBD

Tritanopia (blue-blind)

#00838F

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3f71bf;
/* rgb */ color: rgb(63, 113, 191);
/* oklch */ color: oklch(55.2% 0.133 259.0);

Tailwind

colors: {
  custom: {
    50: '#8199d3',
    500: '#3f71bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f71bf;
$custom-light: #8199d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f71bf",
  "rgb": {
    "r": 63,
    "g": 113,
    "b": 191
  },
  "hsl": {
    "h": 216.563,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.55242,
    "c": 0.13336,
    "h": 259
  },
  "luminance": 0.16629
}

Semantic roles & 50–950 ramp

primary

#3F71BF

secondary

#CAB390

accent

#A34EDA

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0D14

muted

#7C7E83

Preview Lab

Preview with #3F71BF

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

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