#3F72BE#3F72BE

#3F72BE is a mid, vivid blue. Relative luminance 0.168; OKLCH L 55.4% C 0.131 H 258.2°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F72BE
RGB	rgb(63, 114, 190)
HSL	hsl(216, 50%, 50%)
HSV	hsv(216, 67%, 75%)
CMYK	cmyk(66.8%, 40%, 0%, 25.5%)
CIE-LAB	lab(48.02, 7.74, -44.98)
CIE-LCH	lch(48.02, 45.65, 279.77°)
OKLab	oklab(55.4% -0.0267 -0.1281)
OKLCH	oklch(55.4% 0.131 258.2)
XYZ	xyz(17.3581, 16.8074, 51.0346)
Luminance	0.1681 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F72BE #BE8B3F

analogous

#3FB1BE #3F72BE #4C3FBE

triadic

#3F72BE #BE3F72 #72BE3F

tetradic

#3F72BE #BE3FB1 #BE8B3F #3FBE4C

square

#3F72BE #BE3FB1 #BE8B3F #3FBE4C

split-complementary

#3F72BE #BE4C3F #B1BE3F

monochromatic

#213B62 #305690 #3F72BE #6C93CE #9AB5DD

Accessibility & contrast

On white

4.81

#3F72BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#3F72BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F72BE

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F72BE	#FFFFFF	#000000	##FFFFFF
##3F72BE	1.00	4.81	4.36	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F78C1

Deuteranopia (green-blind)

#3C6DBC

Tritanopia (blue-blind)

#00838F

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3f72be;
/* rgb */ color: rgb(63, 114, 190);
/* oklch */ color: oklch(55.4% 0.131 258.2);

Tailwind

colors: {
  custom: {
    50: '#819ad2',
    500: '#3f72be',
    950: '#000000',
  },
}

SCSS

$custom: #3f72be;
$custom-light: #819ad2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f72be",
  "rgb": {
    "r": 63,
    "g": 114,
    "b": 190
  },
  "hsl": {
    "h": 215.906,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.55402,
    "c": 0.13087,
    "h": 258.2
  },
  "luminance": 0.16809
}

Semantic roles & 50–950 ramp

primary

#3F72BE

secondary

#C9B28F

accent

#A24EDA

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F72BE

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

Preview Lab → · Contrast checker → · Palette generator →