#3F54BD#3F54BD

#3F54BD is a mid, vivid blue. Relative luminance 0.111; OKLCH L 49.0% C 0.166 H 270.5°. Best body text is #FFFFFF at 6.53:1 contrast (WCAG AA passes).

Color values

HEX	#3F54BD
RGB	rgb(63, 84, 189)
HSL	hsl(230, 50%, 49%)
HSV	hsv(230, 67%, 74%)
CMYK	cmyk(66.7%, 55.6%, 0%, 25.9%)
CIE-LAB	lab(39.70, 26.48, -57.76)
CIE-LCH	lch(39.70, 63.55, 294.63°)
OKLab	oklab(49.03% 0.0016 -0.1661)
OKLCH	oklch(49.03% 0.166 270.5)
XYZ	xyz(14.4024, 11.0702, 49.5120)
Luminance	0.1107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F54BD #BDA83F

analogous

#3F93BD #3F54BD #693FBD

triadic

#3F54BD #BD3F54 #54BD3F

tetradic

#3F54BD #BD3F93 #BDA83F #3FBD69

square

#3F54BD #BD3F93 #BDA83F #3FBD69

split-complementary

#3F54BD #BD693F #93BD3F

monochromatic

#202B61 #30408F #3F54BD #6B7CCE #99A5DD

Accessibility & contrast

On white

6.53

#3F54BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.21

#3F54BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F54BD

6.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F54BD	#FFFFFF	#000000	##FFFFFF
##3F54BD	1.00	6.53	3.21	6.53
#FFFFFF	6.53	1.00	21.00	1.00
#000000	3.21	21.00	1.00	21.00
##FFFFFF	6.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C1

Deuteranopia (green-blind)

#0058BB

Tritanopia (blue-blind)

#006D80

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f54bd;
/* rgb */ color: rgb(63, 84, 189);
/* oklch */ color: oklch(49.0% 0.166 270.5);

Tailwind

colors: {
  custom: {
    50: '#8283d2',
    500: '#3f54bd',
    950: '#000000',
  },
}

SCSS

$custom: #3f54bd;
$custom-light: #8283d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f54bd",
  "rgb": {
    "r": 63,
    "g": 84,
    "b": 189
  },
  "hsl": {
    "h": 230,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.49027,
    "c": 0.16615,
    "h": 270.5
  },
  "luminance": 0.11072
}

Semantic roles & 50–950 ramp

primary

#3F54BD

secondary

#C9BF8F

accent

#C24EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F54BD

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

Preview Lab → · Contrast checker → · Palette generator →