#3F59D3#3F59D3

#3F59D3 is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.7% C 0.190 H 269.4°. Best body text is #FFFFFF at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#3F59D3
RGB	rgb(63, 89, 211)
HSL	hsl(229, 63%, 54%)
HSV	hsv(229, 70%, 83%)
CMYK	cmyk(70.1%, 57.8%, 0%, 17.3%)
CIE-LAB	lab(42.62, 31.12, -65.76)
CIE-LCH	lch(42.62, 72.75, 295.32°)
OKLab	oklab(51.72% -0.0018 -0.1896)
OKLCH	oklch(51.72% 0.19 269.4)
XYZ	xyz(17.3761, 12.9029, 63.1902)
Luminance	0.1290 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59D3 #D3B93F

analogous

#3FA3D3 #3F59D3 #6F3FD3

triadic

#3F59D3 #D33F59 #59D33F

tetradic

#3F59D3 #D33FA3 #D3B93F #3FD36F

square

#3F59D3 #D33FA3 #D3B93F #3FD36F

split-complementary

#3F59D3 #D36F3F #A3D33F

monochromatic

#1C2D7B #283FAD #3F59D3 #7184DE #A3AFEA

Accessibility & contrast

On white

5.86

#3F59D3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.58

#3F59D3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59D3

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59D3	#FFFFFF	#000000	##FFFFFF
##3F59D3	1.00	5.86	3.58	5.86
#FFFFFF	5.86	1.00	21.00	1.00
#000000	3.58	21.00	1.00	21.00
##FFFFFF	5.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CD7

Deuteranopia (green-blind)

#005ED1

Tritanopia (blue-blind)

#00778D

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f59d3;
/* rgb */ color: rgb(63, 89, 211);
/* oklch */ color: oklch(51.7% 0.190 269.4);

Tailwind

colors: {
  custom: {
    50: '#8687e1',
    500: '#3f59d3',
    950: '#000000',
  },
}

SCSS

$custom: #3f59d3;
$custom-light: #8687e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59d3",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 211
  },
  "hsl": {
    "h": 229.459,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.51724,
    "c": 0.1896,
    "h": 269.4
  },
  "luminance": 0.12905
}

Semantic roles & 50–950 ramp

primary

#3F59D3

secondary

#D7CB97

accent

#C942E6

background

#F9F8FD

surface

#F1EFFB

border

#CBCAD4

text

#0D0B15

muted

#7E7C83

Preview Lab

Preview with #3F59D3

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

Preview Lab → · Contrast checker → · Palette generator →