#3F72BD#3F72BD

#3F72BD is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.3% C 0.130 H 258.0°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#3F72BD
RGB	rgb(63, 114, 189)
HSL	hsl(216, 50%, 49%)
HSV	hsv(216, 67%, 74%)
CMYK	cmyk(66.7%, 39.7%, 0%, 25.9%)
CIE-LAB	lab(47.96, 7.39, -44.50)
CIE-LCH	lch(47.96, 45.10, 279.43°)
OKLab	oklab(55.34% -0.0269 -0.1267)
OKLCH	oklch(55.34% 0.13 258)
XYZ	xyz(17.2492, 16.7638, 50.4609)
Luminance	0.1677 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72BD #BD8A3F

analogous

#3FB1BD #3F72BD #4B3FBD

triadic

#3F72BD #BD3F72 #72BD3F

tetradic

#3F72BD #BD3FB1 #BD8A3F #3FBD4B

square

#3F72BD #BD3FB1 #BD8A3F #3FBD4B

split-complementary

#3F72BD #BD4B3F #B1BD3F

monochromatic

#203B61 #30568F #3F72BD #6B93CE #99B5DD

Accessibility & contrast

On white

4.82

#3F72BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#3F72BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72BD

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72BD	#FFFFFF	#000000	##FFFFFF
##3F72BD	1.00	4.82	4.35	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5078C0

Deuteranopia (green-blind)

#3D6CBB

Tritanopia (blue-blind)

#00838E

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f72bd;
/* rgb */ color: rgb(63, 114, 189);
/* oklch */ color: oklch(55.3% 0.130 258.0);

Tailwind

colors: {
  custom: {
    50: '#819ad1',
    500: '#3f72bd',
    950: '#000000',
  },
}

SCSS

$custom: #3f72bd;
$custom-light: #819ad1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72bd",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 189
  },
  "hsl": {
    "h": 215.714,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55341,
    "c": 0.12952,
    "h": 258
  },
  "luminance": 0.16766
}

Semantic roles & 50–950 ramp

primary

#3F72BD

secondary

#C9B18F

accent

#A14EDA

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F72BD

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

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