#3F59C8#3F59C8

#3F59C8 is a mid, vivid blue. Relative luminance 0.124; OKLCH L 50.9% C 0.175 H 269.3°. Best body text is #FFFFFF at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#3F59C8
RGB	rgb(63, 89, 200)
HSL	hsl(229, 55%, 52%)
HSV	hsv(229, 69%, 78%)
CMYK	cmyk(68.5%, 55.5%, 0%, 21.6%)
CIE-LAB	lab(41.80, 27.20, -60.75)
CIE-LCH	lch(41.80, 66.56, 294.12°)
OKLab	oklab(50.86% -0.0022 -0.1749)
OKLCH	oklch(50.86% 0.175 269.3)
XYZ	xyz(16.0440, 12.3701, 56.1745)
Luminance	0.1237 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59C8 #C8AE3F

analogous

#3F9EC8 #3F59C8 #6A3FC8

triadic

#3F59C8 #C83F59 #59C83F

tetradic

#3F59C8 #C83F9E #C8AE3F #3FC86A

square

#3F59C8 #C83F9E #C8AE3F #3FC86A

split-complementary

#3F59C8 #C86A3F #9EC83F

monochromatic

#1F2E6D #2D429D #3F59C8 #6F82D6 #9EABE3

Accessibility & contrast

On white

6.04

#3F59C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.47

#3F59C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59C8

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59C8	#FFFFFF	#000000	##FFFFFF
##3F59C8	1.00	6.04	3.47	6.04
#FFFFFF	6.04	1.00	21.00	1.00
#000000	3.47	21.00	1.00	21.00
##FFFFFF	6.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069CC

Deuteranopia (green-blind)

#005DC6

Tritanopia (blue-blind)

#007488

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f59c8;
/* rgb */ color: rgb(63, 89, 200);
/* oklch */ color: oklch(50.9% 0.175 269.3);

Tailwind

colors: {
  custom: {
    50: '#8487d9',
    500: '#3f59c8',
    950: '#000000',
  },
}

SCSS

$custom: #3f59c8;
$custom-light: #8487d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59c8",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 200
  },
  "hsl": {
    "h": 228.613,
    "s": 55.466,
    "l": 51.569
  },
  "oklch": {
    "l": 0.50855,
    "c": 0.17488,
    "h": 269.3
  },
  "luminance": 0.12372
}

Semantic roles & 50–950 ramp

primary

#3F59C8

secondary

#D0C493

accent

#C249DF

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F59C8

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

Preview Lab → · Contrast checker → · Palette generator →