#3F55CF#3F55CF

#3F55CF is a mid, vivid blue. Relative luminance 0.121; OKLCH L 50.7% C 0.189 H 270.4°. Best body text is #FFFFFF at 6.16:1 contrast (WCAG AA passes).

Color values

HEX	#3F55CF
RGB	rgb(63, 85, 207)
HSL	hsl(231, 60%, 53%)
HSV	hsv(231, 70%, 81%)
CMYK	cmyk(69.6%, 58.9%, 0%, 18.8%)
CIE-LAB	lab(41.31, 32.23, -65.59)
CIE-LCH	lch(41.31, 73.09, 296.17°)
OKLab	oklab(50.65% 0.0012 -0.1892)
OKLCH	oklch(50.65% 0.189 270.4)
XYZ	xyz(16.5570, 12.0571, 60.4741)
Luminance	0.1206 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55CF #CFB93F

analogous

#3F9DCF #3F55CF #713FCF

triadic

#3F55CF #CF3F55 #55CF3F

tetradic

#3F55CF #CF3F9D #CFB93F #3FCF71

square

#3F55CF #CF3F9D #CFB93F #3FCF71

split-complementary

#3F55CF #CF713F #9DCF3F

monochromatic

#1E2B76 #2A3DA7 #3F55CF #7080DB #A1ACE7

Accessibility & contrast

On white

6.16

#3F55CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.41

#3F55CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55CF

6.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55CF	#FFFFFF	#000000	##FFFFFF
##3F55CF	1.00	6.16	3.41	6.16
#FFFFFF	6.16	1.00	21.00	1.00
#000000	3.41	21.00	1.00	21.00
##FFFFFF	6.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D3

Deuteranopia (green-blind)

#005BCD

Tritanopia (blue-blind)

#00738A

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f55cf;
/* rgb */ color: rgb(63, 85, 207);
/* oklch */ color: oklch(50.7% 0.189 270.4);

Tailwind

colors: {
  custom: {
    50: '#8684df',
    500: '#3f55cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f55cf;
$custom-light: #8684df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55cf",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 207
  },
  "hsl": {
    "h": 230.833,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.50653,
    "c": 0.18915,
    "h": 270.4
  },
  "luminance": 0.12059
}

Semantic roles & 50–950 ramp

primary

#3F55CF

secondary

#D4CB96

accent

#CB45E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0D0B15

muted

#7D7C83

Preview Lab

Preview with #3F55CF

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

Preview Lab → · Contrast checker → · Palette generator →