#3F52B7#3F52B7

#3F52B7 is a mid, vivid blue. Relative luminance 0.105; OKLCH L 48.2% C 0.160 H 271.1°. Best body text is #FFFFFF at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F52B7
RGB	rgb(63, 82, 183)
HSL	hsl(231, 49%, 48%)
HSV	hsv(231, 66%, 72%)
CMYK	cmyk(65.6%, 55.2%, 0%, 28.2%)
CIE-LAB	lab(38.74, 25.64, -55.80)
CIE-LCH	lch(38.74, 61.41, 294.68°)
OKLab	oklab(48.17% 0.0031 -0.1604)
OKLCH	oklch(48.17% 0.16 271.1)
XYZ	xyz(13.6116, 10.5090, 46.1017)
Luminance	0.1051 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F52B7 #B7A43F

analogous

#3F8EB7 #3F52B7 #683FB7

triadic

#3F52B7 #B73F52 #52B73F

tetradic

#3F52B7 #B73F8E #B7A43F #3FB768

square

#3F52B7 #B73F8E #B7A43F #3FB768

split-complementary

#3F52B7 #B7683F #8EB73F

monochromatic

#20295C #2F3E89 #3F52B7 #6878CB #96A1DB

Accessibility & contrast

On white

6.77

#3F52B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#3F52B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F52B7

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F52B7	#FFFFFF	#000000	##FFFFFF
##3F52B7	1.00	6.77	3.10	6.77
#FFFFFF	6.77	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061BA

Deuteranopia (green-blind)

#0056B5

Tritanopia (blue-blind)

#006A7C

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3f52b7;
/* rgb */ color: rgb(63, 82, 183);
/* oklch */ color: oklch(48.2% 0.160 271.1);

Tailwind

colors: {
  custom: {
    50: '#8182cd',
    500: '#3f52b7',
    950: '#000000',
  },
}

SCSS

$custom: #3f52b7;
$custom-light: #8182cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f52b7",
  "rgb": {
    "r": 63,
    "g": 82,
    "b": 183
  },
  "hsl": {
    "h": 230.5,
    "s": 48.78,
    "l": 48.235
  },
  "oklch": {
    "l": 0.48171,
    "c": 0.16042,
    "h": 271.1
  },
  "luminance": 0.1051
}

Semantic roles & 50–950 ramp

primary

#3F52B7

secondary

#C6BD8B

accent

#C34FD8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0B0A14

muted

#7C7C82

Preview Lab

Preview with #3F52B7

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

Preview Lab → · Contrast checker → · Palette generator →