#3F55CD#3F55CD

#3F55CD is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.5% C 0.186 H 270.4°. Best body text is #FFFFFF at 6.19:1 contrast (WCAG AA passes).

Color values

HEX	#3F55CD
RGB	rgb(63, 85, 205)
HSL	hsl(231, 59%, 53%)
HSV	hsv(231, 69%, 80%)
CMYK	cmyk(69.3%, 58.5%, 0%, 19.6%)
CIE-LAB	lab(41.15, 31.53, -64.69)
CIE-LCH	lch(41.15, 71.97, 295.98°)
OKLab	oklab(50.49% 0.0012 -0.1865)
OKLCH	oklch(50.49% 0.187 270.4)
XYZ	xyz(16.3141, 11.9599, 59.1945)
Luminance	0.1196 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55CD #CDB73F

analogous

#3F9CCD #3F55CD #703FCD

triadic

#3F55CD #CD3F55 #55CD3F

tetradic

#3F55CD #CD3F9C #CDB73F #3FCD70

square

#3F55CD #CD3F9C #CDB73F #3FCD70

split-complementary

#3F55CD #CD703F #9CCD3F

monochromatic

#1E2B74 #2B3EA4 #3F55CD #7080DA #A0ABE6

Accessibility & contrast

On white

6.19

#3F55CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.39

#3F55CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55CD

6.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55CD	#FFFFFF	#000000	##FFFFFF
##3F55CD	1.00	6.19	3.39	6.19
#FFFFFF	6.19	1.00	21.00	1.00
#000000	3.39	21.00	1.00	21.00
##FFFFFF	6.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D1

Deuteranopia (green-blind)

#005BCB

Tritanopia (blue-blind)

#007389

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f55cd;
/* rgb */ color: rgb(63, 85, 205);
/* oklch */ color: oklch(50.5% 0.186 270.4);

Tailwind

colors: {
  custom: {
    50: '#8584dd',
    500: '#3f55cd',
    950: '#000000',
  },
}

SCSS

$custom: #3f55cd;
$custom-light: #8584dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55cd",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 205
  },
  "hsl": {
    "h": 230.704,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.5049,
    "c": 0.1865,
    "h": 270.4
  },
  "luminance": 0.11962
}

Semantic roles & 50–950 ramp

primary

#3F55CD

secondary

#D3C995

accent

#CA46E2

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F55CD

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

Preview Lab → · Contrast checker → · Palette generator →