#3F52BC#3F52BC

#3F52BC is a mid, vivid blue. Relative luminance 0.107; OKLCH L 48.6% C 0.167 H 271.1°. Best body text is #FFFFFF at 6.68:1 contrast (WCAG AA passes).

Color values

HEX	#3F52BC
RGB	rgb(63, 82, 188)
HSL	hsl(231, 50%, 49%)
HSV	hsv(231, 66%, 74%)
CMYK	cmyk(66.5%, 56.4%, 0%, 26.3%)
CIE-LAB	lab(39.11, 27.42, -58.14)
CIE-LCH	lch(39.11, 64.28, 295.25°)
OKLab	oklab(48.56% 0.0033 -0.1673)
OKLCH	oklch(48.56% 0.167 271.1)
XYZ	xyz(14.1412, 10.7209, 48.8913)
Luminance	0.1072 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F52BC #BCA93F

analogous

#3F91BC #3F52BC #6B3FBC

triadic

#3F52BC #BC3F52 #52BC3F

tetradic

#3F52BC #BC3F91 #BCA93F #3FBC6B

square

#3F52BC #BC3F91 #BCA93F #3FBC6B

split-complementary

#3F52BC #BC6B3F #91BC3F

monochromatic

#202A60 #303E8E #3F52BC #6B7ACD #99A3DD

Accessibility & contrast

On white

6.68

#3F52BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#3F52BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F52BC

6.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F52BC	#FFFFFF	#000000	##FFFFFF
##3F52BC	1.00	6.68	3.14	6.68
#FFFFFF	6.68	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062C0

Deuteranopia (green-blind)

#0057BA

Tritanopia (blue-blind)

#006C7F

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3f52bc;
/* rgb */ color: rgb(63, 82, 188);
/* oklch */ color: oklch(48.6% 0.167 271.1);

Tailwind

colors: {
  custom: {
    50: '#8282d1',
    500: '#3f52bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f52bc;
$custom-light: #8282d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f52bc",
  "rgb": {
    "r": 63,
    "g": 82,
    "b": 188
  },
  "hsl": {
    "h": 230.88,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.4856,
    "c": 0.1673,
    "h": 271.1
  },
  "luminance": 0.10722
}

Semantic roles & 50–950 ramp

primary

#3F52BC

secondary

#C9C08E

accent

#C44ED9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F52BC

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

Preview Lab → · Contrast checker → · Palette generator →