#3F55BD#3F55BD

#3F55BD is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.2% C 0.165 H 270.2°. Best body text is #FFFFFF at 6.47:1 contrast (WCAG AA passes).

Color values

HEX	#3F55BD
RGB	rgb(63, 85, 189)
HSL	hsl(230, 50%, 49%)
HSV	hsv(230, 67%, 74%)
CMYK	cmyk(66.7%, 55%, 0%, 25.9%)
CIE-LAB	lab(39.96, 25.84, -57.34)
CIE-LCH	lch(39.96, 62.90, 294.26°)
OKLab	oklab(49.22% 0.0007 -0.1649)
OKLCH	oklch(49.22% 0.165 270.2)
XYZ	xyz(14.4806, 11.2265, 49.5381)
Luminance	0.1123 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55BD #BDA73F

analogous

#3F94BD #3F55BD #683FBD

triadic

#3F55BD #BD3F55 #55BD3F

tetradic

#3F55BD #BD3F94 #BDA73F #3FBD68

square

#3F55BD #BD3F94 #BDA73F #3FBD68

split-complementary

#3F55BD #BD683F #94BD3F

monochromatic

#202C61 #30408F #3F55BD #6B7DCE #99A5DD

Accessibility & contrast

On white

6.47

#3F55BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#3F55BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55BD

6.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55BD	#FFFFFF	#000000	##FFFFFF
##3F55BD	1.00	6.47	3.25	6.47
#FFFFFF	6.47	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064C1

Deuteranopia (green-blind)

#0059BB

Tritanopia (blue-blind)

#006E81

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #3f55bd;
/* rgb */ color: rgb(63, 85, 189);
/* oklch */ color: oklch(49.2% 0.165 270.2);

Tailwind

colors: {
  custom: {
    50: '#8284d2',
    500: '#3f55bd',
    950: '#000000',
  },
}

SCSS

$custom: #3f55bd;
$custom-light: #8284d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55bd",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 189
  },
  "hsl": {
    "h": 229.524,
    "s": 50,
    "l": 49.412
  },
  "oklch": {
    "l": 0.49222,
    "c": 0.16488,
    "h": 270.2
  },
  "luminance": 0.11228
}

Semantic roles & 50–950 ramp

primary

#3F55BD

secondary

#C9BF8F

accent

#C14EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F55BD

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

Preview Lab → · Contrast checker → · Palette generator →