#3F72BF#3F72BF

#3F72BF is a mid, vivid blue. Relative luminance 0.169; OKLCH L 55.5% C 0.132 H 258.5°. Best body text is #FFFFFF at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#3F72BF
RGB	rgb(63, 114, 191)
HSL	hsl(216, 50%, 50%)
HSV	hsv(216, 67%, 75%)
CMYK	cmyk(67%, 40.3%, 0%, 25.1%)
CIE-LAB	lab(48.07, 8.10, -45.47)
CIE-LCH	lch(48.07, 46.19, 280.10°)
OKLab	oklab(55.46% -0.0264 -0.1296)
OKLCH	oklch(55.46% 0.132 258.5)
XYZ	xyz(17.4678, 16.8512, 51.6122)
Luminance	0.1685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72BF #BF8C3F

analogous

#3FB2BF #3F72BF #4C3FBF

triadic

#3F72BF #BF3F72 #72BF3F

tetradic

#3F72BF #BF3FB2 #BF8C3F #3FBF4C

square

#3F72BF #BF3FB2 #BF8C3F #3FBF4C

split-complementary

#3F72BF #BF4C3F #B2BF3F

monochromatic

#213B63 #305791 #3F72BF #6D94CF #9BB5DE

Accessibility & contrast

On white

4.80

#3F72BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#3F72BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72BF

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72BF	#FFFFFF	#000000	##FFFFFF
##3F72BF	1.00	4.80	4.37	4.80
#FFFFFF	4.80	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F79C2

Deuteranopia (green-blind)

#3B6DBD

Tritanopia (blue-blind)

#00848F

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f72bf;
/* rgb */ color: rgb(63, 114, 191);
/* oklch */ color: oklch(55.5% 0.132 258.5);

Tailwind

colors: {
  custom: {
    50: '#819ad3',
    500: '#3f72bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f72bf;
$custom-light: #819ad3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72bf",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 191
  },
  "hsl": {
    "h": 216.094,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.55463,
    "c": 0.13223,
    "h": 258.5
  },
  "luminance": 0.16853
}

Semantic roles & 50–950 ramp

primary

#3F72BF

secondary

#CAB390

accent

#A24EDA

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0E14

muted

#7C7E83

Preview Lab

Preview with #3F72BF

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

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