#3F52BB#3F52BB

#3F52BB is a mid, vivid blue. Relative luminance 0.107; OKLCH L 48.5% C 0.166 H 271.1°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#3F52BB
RGB	rgb(63, 82, 187)
HSL	hsl(231, 50%, 49%)
HSV	hsv(231, 66%, 73%)
CMYK	cmyk(66.3%, 56.1%, 0%, 26.7%)
CIE-LAB	lab(39.03, 27.06, -57.67)
CIE-LCH	lch(39.03, 63.71, 295.14°)
OKLab	oklab(48.48% 0.0033 -0.1659)
OKLCH	oklch(48.48% 0.166 271.1)
XYZ	xyz(14.0338, 10.6779, 48.3255)
Luminance	0.1068 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F52BB #BBA83F

analogous

#3F90BB #3F52BB #6A3FBB

triadic

#3F52BB #BB3F52 #52BB3F

tetradic

#3F52BB #BB3F90 #BBA83F #3FBB6A

square

#3F52BB #BB3F90 #BBA83F #3FBB6A

split-complementary

#3F52BB #BB6A3F #90BB3F

monochromatic

#202A5F #303E8D #3F52BB #6A79CD #98A3DC

Accessibility & contrast

On white

6.70

#3F52BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.14

#3F52BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F52BB

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F52BB	#FFFFFF	#000000	##FFFFFF
##3F52BB	1.00	6.70	3.14	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.14	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062BF

Deuteranopia (green-blind)

#0057B9

Tritanopia (blue-blind)

#006B7E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #3f52bb;
/* rgb */ color: rgb(63, 82, 187);
/* oklch */ color: oklch(48.5% 0.166 271.1);

Tailwind

colors: {
  custom: {
    50: '#8282d0',
    500: '#3f52bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f52bb;
$custom-light: #8282d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f52bb",
  "rgb": {
    "r": 63,
    "g": 82,
    "b": 187
  },
  "hsl": {
    "h": 230.806,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.48482,
    "c": 0.16593,
    "h": 271.1
  },
  "luminance": 0.10679
}

Semantic roles & 50–950 ramp

primary

#3F52BB

secondary

#C8BF8E

accent

#C44FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F52BB

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

Preview Lab → · Contrast checker → · Palette generator →