#3F59C7#3F59C7

#3F59C7 is a mid, vivid blue. Relative luminance 0.123; OKLCH L 50.8% C 0.174 H 269.3°. Best body text is #FFFFFF at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#3F59C7
RGB	rgb(63, 89, 199)
HSL	hsl(229, 55%, 51%)
HSV	hsv(229, 68%, 78%)
CMYK	cmyk(68.3%, 55.3%, 0%, 22%)
CIE-LAB	lab(41.73, 26.84, -60.29)
CIE-LCH	lch(41.73, 66.00, 294.00°)
OKLab	oklab(50.78% -0.0022 -0.1735)
OKLCH	oklch(50.78% 0.174 269.3)
XYZ	xyz(15.9276, 12.3235, 55.5610)
Luminance	0.1232 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59C7 #C7AD3F

analogous

#3F9DC7 #3F59C7 #693FC7

triadic

#3F59C7 #C73F59 #59C73F

tetradic

#3F59C7 #C73F9D #C7AD3F #3FC769

square

#3F59C7 #C73F9D #C7AD3F #3FC769

split-complementary

#3F59C7 #C7693F #9DC73F

monochromatic

#202E6C #2D429B #3F59C7 #6E82D5 #9EABE3

Accessibility & contrast

On white

6.06

#3F59C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#3F59C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59C7

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59C7	#FFFFFF	#000000	##FFFFFF
##3F59C7	1.00	6.06	3.47	6.06
#FFFFFF	6.06	1.00	21.00	1.00
#000000	3.47	21.00	1.00	21.00
##FFFFFF	6.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069CB

Deuteranopia (green-blind)

#005CC5

Tritanopia (blue-blind)

#007487

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3f59c7;
/* rgb */ color: rgb(63, 89, 199);
/* oklch */ color: oklch(50.8% 0.174 269.3);

Tailwind

colors: {
  custom: {
    50: '#8487d9',
    500: '#3f59c7',
    950: '#000000',
  },
}

SCSS

$custom: #3f59c7;
$custom-light: #8487d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59c7",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 199
  },
  "hsl": {
    "h": 228.529,
    "s": 54.839,
    "l": 51.373
  },
  "oklch": {
    "l": 0.50777,
    "c": 0.17352,
    "h": 269.3
  },
  "luminance": 0.12325
}

Semantic roles & 50–950 ramp

primary

#3F59C7

secondary

#CFC393

accent

#C24ADE

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F59C7

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

Preview Lab → · Contrast checker → · Palette generator →