#3F5FD3#3F5FD3

#3F5FD3 is a mid, vivid blue. Relative luminance 0.139; OKLCH L 52.9% C 0.182 H 267.9°. Best body text is #FFFFFF at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#3F5FD3
RGB	rgb(63, 95, 211)
HSL	hsl(227, 63%, 54%)
HSV	hsv(227, 70%, 83%)
CMYK	cmyk(70.1%, 55%, 0%, 17.3%)
CIE-LAB	lab(44.15, 27.31, -63.27)
CIE-LCH	lch(44.15, 68.91, 293.35°)
OKLab	oklab(52.87% -0.0065 -0.1822)
OKLCH	oklch(52.87% 0.182 267.9)
XYZ	xyz(17.8959, 13.9425, 63.3634)
Luminance	0.1394 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5FD3 #D3B33F

analogous

#3FA9D3 #3F5FD3 #693FD3

triadic

#3F5FD3 #D33F5F #5FD33F

tetradic

#3F5FD3 #D33FA9 #D3B33F #3FD369

square

#3F5FD3 #D33FA9 #D3B33F #3FD369

split-complementary

#3F5FD3 #D3693F #A9D33F

monochromatic

#1C317B #2845AD #3F5FD3 #7188DE #A3B2EA

Accessibility & contrast

On white

5.54

#3F5FD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#3F5FD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5FD3

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5FD3	#FFFFFF	#000000	##FFFFFF
##3F5FD3	1.00	5.54	3.79	5.54
#FFFFFF	5.54	1.00	21.00	1.00
#000000	3.79	21.00	1.00	21.00
##FFFFFF	5.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006FD7

Deuteranopia (green-blind)

#0062D1

Tritanopia (blue-blind)

#007B90

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f5fd3;
/* rgb */ color: rgb(63, 95, 211);
/* oklch */ color: oklch(52.9% 0.182 267.9);

Tailwind

colors: {
  custom: {
    50: '#868ce1',
    500: '#3f5fd3',
    950: '#000000',
  },
}

SCSS

$custom: #3f5fd3;
$custom-light: #868ce1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5fd3",
  "rgb": {
    "r": 63,
    "g": 95,
    "b": 211
  },
  "hsl": {
    "h": 227.027,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.52873,
    "c": 0.1823,
    "h": 267.9
  },
  "luminance": 0.13944
}

Semantic roles & 50–950 ramp

primary

#3F5FD3

secondary

#D7C997

accent

#C242E6

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0D0C15

muted

#7D7D83

Preview Lab

Preview with #3F5FD3

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

Preview Lab → · Contrast checker → · Palette generator →