#3F52B2#3F52B2

#3F52B2 is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.8% C 0.153 H 271.0°. Best body text is #FFFFFF at 6.86:1 contrast (WCAG AA passes).

Color values

HEX	#3F52B2
RGB	rgb(63, 82, 178)
HSL	hsl(230, 48%, 47%)
HSV	hsv(230, 65%, 70%)
CMYK	cmyk(64.6%, 53.9%, 0%, 30.2%)
CIE-LAB	lab(38.38, 23.87, -53.43)
CIE-LCH	lch(38.38, 58.52, 294.07°)
OKLab	oklab(47.79% 0.0028 -0.1534)
OKLCH	oklch(47.79% 0.153 271)
XYZ	xyz(13.1004, 10.3045, 43.4095)
Luminance	0.1031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F52B2 #B29F3F

analogous

#3F8CB2 #3F52B2 #663FB2

triadic

#3F52B2 #B23F52 #52B23F

tetradic

#3F52B2 #B23F8C #B29F3F #3FB266

square

#3F52B2 #B23F8C #B29F3F #3FB266

split-complementary

#3F52B2 #B2663F #8CB23F

monochromatic

#1F2858 #2F3D85 #3F52B2 #6676C9 #939ED9

Accessibility & contrast

On white

6.86

#3F52B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#3F52B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F52B2

6.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F52B2	#FFFFFF	#000000	##FFFFFF
##3F52B2	1.00	6.86	3.06	6.86
#FFFFFF	6.86	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1060B5

Deuteranopia (green-blind)

#0055B0

Tritanopia (blue-blind)

#00697A

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #3f52b2;
/* rgb */ color: rgb(63, 82, 178);
/* oklch */ color: oklch(47.8% 0.153 271.0);

Tailwind

colors: {
  custom: {
    50: '#8082ca',
    500: '#3f52b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f52b2;
$custom-light: #8082ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f52b2",
  "rgb": {
    "r": 63,
    "g": 82,
    "b": 178
  },
  "hsl": {
    "h": 230.087,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.47789,
    "c": 0.15346,
    "h": 271
  },
  "luminance": 0.10306
}

Semantic roles & 50–950 ramp

primary

#3F52B2

secondary

#C4BA89

accent

#C150D7

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #3F52B2

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

Preview Lab → · Contrast checker → · Palette generator →