#3F53BE#3F53BE

#3F53BE is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.9% C 0.169 H 270.8°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F53BE
RGB	rgb(63, 83, 190)
HSL	hsl(231, 50%, 50%)
HSV	hsv(231, 67%, 75%)
CMYK	cmyk(66.8%, 56.3%, 0%, 25.5%)
CIE-LAB	lab(39.51, 27.48, -58.65)
CIE-LCH	lch(39.51, 64.77, 295.11°)
OKLab	oklab(48.91% 0.0025 -0.1688)
OKLCH	oklch(48.91% 0.169 270.8)
XYZ	xyz(14.4343, 10.9596, 50.0600)
Luminance	0.1096 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F53BE #BEAA3F

analogous

#3F93BE #3F53BE #6A3FBE

triadic

#3F53BE #BE3F53 #53BE3F

tetradic

#3F53BE #BE3F93 #BEAA3F #3FBE6A

square

#3F53BE #BE3F93 #BEAA3F #3FBE6A

split-complementary

#3F53BE #BE6A3F #93BE3F

monochromatic

#212B62 #303F90 #3F53BE #6C7BCE #9AA5DD

Accessibility & contrast

On white

6.58

#3F53BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3F53BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F53BE

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F53BE	#FFFFFF	#000000	##FFFFFF
##3F53BE	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C2

Deuteranopia (green-blind)

#0058BC

Tritanopia (blue-blind)

#006D80

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f53be;
/* rgb */ color: rgb(63, 83, 190);
/* oklch */ color: oklch(48.9% 0.169 270.8);

Tailwind

colors: {
  custom: {
    50: '#8383d2',
    500: '#3f53be',
    950: '#000000',
  },
}

SCSS

$custom: #3f53be;
$custom-light: #8383d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f53be",
  "rgb": {
    "r": 63,
    "g": 83,
    "b": 190
  },
  "hsl": {
    "h": 230.551,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.48911,
    "c": 0.16878,
    "h": 270.8
  },
  "luminance": 0.10961
}

Semantic roles & 50–950 ramp

primary

#3F53BE

secondary

#C9C08F

accent

#C44EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F53BE

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

Preview Lab → · Contrast checker → · Palette generator →