#3F52B5#3F52B5

#3F52B5 is a mid, vivid blue. Relative luminance 0.104; OKLCH L 48.0% C 0.158 H 271.1°. Best body text is #FFFFFF at 6.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F52B5
RGB	rgb(63, 82, 181)
HSL	hsl(230, 48%, 48%)
HSV	hsv(230, 65%, 71%)
CMYK	cmyk(65.2%, 54.7%, 0%, 29%)
CIE-LAB	lab(38.60, 24.93, -54.86)
CIE-LCH	lch(38.60, 60.26, 294.44°)
OKLab	oklab(48.02% 0.003 -0.1576)
OKLCH	oklch(48.02% 0.158 271.1)
XYZ	xyz(13.4049, 10.4263, 45.0132)
Luminance	0.1043 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F52B5 #B5A23F

analogous

#3F8DB5 #3F52B5 #673FB5

triadic

#3F52B5 #B53F52 #52B53F

tetradic

#3F52B5 #B53F8D #B5A23F #3FB567

square

#3F52B5 #B53F8D #B5A23F #3FB567

split-complementary

#3F52B5 #B5673F #8DB53F

monochromatic

#1F295A #2F3D88 #3F52B5 #6777CA #94A0DA

Accessibility & contrast

On white

6.81

#3F52B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#3F52B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F52B5

6.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F52B5	#FFFFFF	#000000	##FFFFFF
##3F52B5	1.00	6.81	3.09	6.81
#FFFFFF	6.81	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0660B8

Deuteranopia (green-blind)

#0056B3

Tritanopia (blue-blind)

#006A7B

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f52b5;
/* rgb */ color: rgb(63, 82, 181);
/* oklch */ color: oklch(48.0% 0.158 271.1);

Tailwind

colors: {
  custom: {
    50: '#8182cc',
    500: '#3f52b5',
    950: '#000000',
  },
}

SCSS

$custom: #3f52b5;
$custom-light: #8182cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f52b5",
  "rgb": {
    "r": 63,
    "g": 82,
    "b": 181
  },
  "hsl": {
    "h": 230.339,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.48017,
    "c": 0.15764,
    "h": 271.1
  },
  "luminance": 0.10428
}

Semantic roles & 50–950 ramp

primary

#3F52B5

secondary

#C5BC8A

accent

#C250D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3F52B5

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

Preview Lab → · Contrast checker → · Palette generator →