#3F55CE#3F55CE

#3F55CE is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.6% C 0.188 H 270.4°. Best body text is #FFFFFF at 6.17:1 contrast (WCAG AA passes).

Color values

HEX	#3F55CE
RGB	rgb(63, 85, 206)
HSL	hsl(231, 59%, 53%)
HSV	hsv(231, 69%, 81%)
CMYK	cmyk(69.4%, 58.7%, 0%, 19.2%)
CIE-LAB	lab(41.23, 31.88, -65.14)
CIE-LCH	lch(41.23, 72.53, 296.08°)
OKLab	oklab(50.57% 0.0012 -0.1878)
OKLCH	oklch(50.57% 0.188 270.4)
XYZ	xyz(16.4352, 12.0084, 59.8323)
Luminance	0.1201 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55CE #CEB83F

analogous

#3F9DCE #3F55CE #703FCE

triadic

#3F55CE #CE3F55 #55CE3F

tetradic

#3F55CE #CE3F9D #CEB83F #3FCE70

square

#3F55CE #CE3F9D #CEB83F #3FCE70

split-complementary

#3F55CE #CE703F #9DCE3F

monochromatic

#1E2B75 #2A3DA6 #3F55CE #7080DA #A1ABE7

Accessibility & contrast

On white

6.17

#3F55CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.40

#3F55CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55CE

6.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55CE	#FFFFFF	#000000	##FFFFFF
##3F55CE	1.00	6.17	3.40	6.17
#FFFFFF	6.17	1.00	21.00	1.00
#000000	3.40	21.00	1.00	21.00
##FFFFFF	6.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D2

Deuteranopia (green-blind)

#005BCC

Tritanopia (blue-blind)

#007389

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f55ce;
/* rgb */ color: rgb(63, 85, 206);
/* oklch */ color: oklch(50.6% 0.188 270.4);

Tailwind

colors: {
  custom: {
    50: '#8684de',
    500: '#3f55ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f55ce;
$custom-light: #8684de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55ce",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 206
  },
  "hsl": {
    "h": 230.769,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.50571,
    "c": 0.18782,
    "h": 270.4
  },
  "luminance": 0.1201
}

Semantic roles & 50–950 ramp

primary

#3F55CE

secondary

#D3CA95

accent

#CA45E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0D0B15

muted

#7D7C83

Preview Lab

Preview with #3F55CE

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

Preview Lab → · Contrast checker → · Palette generator →