#3F55D0#3F55D0

#3F55D0 is a mid, vivid blue. Relative luminance 0.121; OKLCH L 50.7% C 0.190 H 270.4°. Best body text is #FFFFFF at 6.14:1 contrast (WCAG AA passes).

Color values

HEX	#3F55D0
RGB	rgb(63, 85, 208)
HSL	hsl(231, 61%, 53%)
HSV	hsv(231, 70%, 82%)
CMYK	cmyk(69.7%, 59.1%, 0%, 18.4%)
CIE-LAB	lab(41.38, 32.59, -66.04)
CIE-LCH	lch(41.38, 73.65, 296.26°)
OKLab	oklab(50.74% 0.0012 -0.1905)
OKLCH	oklch(50.74% 0.19 270.4)
XYZ	xyz(16.6797, 12.1062, 61.1200)
Luminance	0.1211 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55D0 #D0BA3F

analogous

#3F9DD0 #3F55D0 #723FD0

triadic

#3F55D0 #D03F55 #55D03F

tetradic

#3F55D0 #D03F9D #D0BA3F #3FD072

square

#3F55D0 #D03F9D #D0BA3F #3FD072

split-complementary

#3F55D0 #D0723F #9DD03F

monochromatic

#1D2B77 #293DA9 #3F55D0 #7081DC #A1ACE8

Accessibility & contrast

On white

6.14

#3F55D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.42

#3F55D0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55D0

6.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55D0	#FFFFFF	#000000	##FFFFFF
##3F55D0	1.00	6.14	3.42	6.14
#FFFFFF	6.14	1.00	21.00	1.00
#000000	3.42	21.00	1.00	21.00
##FFFFFF	6.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068D4

Deuteranopia (green-blind)

#005BCE

Tritanopia (blue-blind)

#00748A

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3f55d0;
/* rgb */ color: rgb(63, 85, 208);
/* oklch */ color: oklch(50.7% 0.190 270.4);

Tailwind

colors: {
  custom: {
    50: '#8684df',
    500: '#3f55d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f55d0;
$custom-light: #8684df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55d0",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 208
  },
  "hsl": {
    "h": 230.897,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.50735,
    "c": 0.19047,
    "h": 270.4
  },
  "luminance": 0.12108
}

Semantic roles & 50–950 ramp

primary

#3F55D0

secondary

#D5CB96

accent

#CC44E4

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0D0B15

muted

#7D7C83

Preview Lab

Preview with #3F55D0

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

Preview Lab → · Contrast checker → · Palette generator →