#3F55D2#3F55D2

#3F55D2 is a mid, vivid blue. Relative luminance 0.122; OKLCH L 50.9% C 0.193 H 270.4°. Best body text is #FFFFFF at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#3F55D2
RGB	rgb(63, 85, 210)
HSL	hsl(231, 62%, 54%)
HSV	hsv(231, 70%, 82%)
CMYK	cmyk(70%, 59.5%, 0%, 17.6%)
CIE-LAB	lab(41.54, 33.29, -66.94)
CIE-LCH	lch(41.54, 74.76, 296.44°)
OKLab	oklab(50.9% 0.0012 -0.1931)
OKLCH	oklch(50.9% 0.193 270.4)
XYZ	xyz(16.9273, 12.2052, 62.4240)
Luminance	0.1221 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F55D2 #D2BC3F

analogous

#3F9FD2 #3F55D2 #723FD2

triadic

#3F55D2 #D23F55 #55D23F

tetradic

#3F55D2 #D23F9F #D2BC3F #3FD272

square

#3F55D2 #D23F9F #D2BC3F #3FD272

split-complementary

#3F55D2 #D2723F #9FD23F

monochromatic

#1D2B7A #283CAC #3F55D2 #7181DE #A2ADE9

Accessibility & contrast

On white

6.10

#3F55D2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.44

#3F55D2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F55D2

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F55D2	#FFFFFF	#000000	##FFFFFF
##3F55D2	1.00	6.10	3.44	6.10
#FFFFFF	6.10	1.00	21.00	1.00
#000000	3.44	21.00	1.00	21.00
##FFFFFF	6.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069D6

Deuteranopia (green-blind)

#005BD0

Tritanopia (blue-blind)

#00748B

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3f55d2;
/* rgb */ color: rgb(63, 85, 210);
/* oklch */ color: oklch(50.9% 0.193 270.4);

Tailwind

colors: {
  custom: {
    50: '#8684e1',
    500: '#3f55d2',
    950: '#000000',
  },
}

SCSS

$custom: #3f55d2;
$custom-light: #8684e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f55d2",
  "rgb": {
    "r": 63,
    "g": 85,
    "b": 210
  },
  "hsl": {
    "h": 231.02,
    "s": 62.025,
    "l": 53.529
  },
  "oklch": {
    "l": 0.509,
    "c": 0.1931,
    "h": 270.4
  },
  "luminance": 0.12207
}

Semantic roles & 50–950 ramp

primary

#3F55D2

secondary

#D6CC97

accent

#CD43E5

background

#F9F8FD

surface

#F1EFFB

border

#CBCAD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #3F55D2

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

Preview Lab → · Contrast checker → · Palette generator →