#3F59BE#3F59BE

#3F59BE is a mid, vivid blue. Relative luminance 0.119; OKLCH L 50.1% C 0.161 H 269.0°. Best body text is #FFFFFF at 6.21:1 contrast (WCAG AA passes).

Color values

HEX	#3F59BE
RGB	rgb(63, 89, 190)
HSL	hsl(228, 50%, 50%)
HSV	hsv(228, 67%, 75%)
CMYK	cmyk(66.8%, 53.2%, 0%, 25.5%)
CIE-LAB	lab(41.09, 23.62, -56.10)
CIE-LCH	lch(41.09, 60.87, 292.83°)
OKLab	oklab(50.09% -0.0028 -0.1612)
OKLCH	oklch(50.09% 0.161 269)
XYZ	xyz(14.9134, 11.9178, 50.2197)
Luminance	0.1192 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59BE #BEA43F

analogous

#3F98BE #3F59BE #653FBE

triadic

#3F59BE #BE3F59 #59BE3F

tetradic

#3F59BE #BE3F98 #BEA43F #3FBE65

square

#3F59BE #BE3F98 #BEA43F #3FBE65

split-complementary

#3F59BE #BE653F #98BE3F

monochromatic

#212E62 #304390 #3F59BE #6C80CE #9AA8DD

Accessibility & contrast

On white

6.21

#3F59BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.38

#3F59BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59BE

6.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59BE	#FFFFFF	#000000	##FFFFFF
##3F59BE	1.00	6.21	3.38	6.21
#FFFFFF	6.21	1.00	21.00	1.00
#000000	3.38	21.00	1.00	21.00
##FFFFFF	6.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1467C2

Deuteranopia (green-blind)

#005BBC

Tritanopia (blue-blind)

#007183

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f59be;
/* rgb */ color: rgb(63, 89, 190);
/* oklch */ color: oklch(50.1% 0.161 269.0);

Tailwind

colors: {
  custom: {
    50: '#8287d2',
    500: '#3f59be',
    950: '#000000',
  },
}

SCSS

$custom: #3f59be;
$custom-light: #8287d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59be",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 190
  },
  "hsl": {
    "h": 227.717,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.50092,
    "c": 0.16121,
    "h": 269
  },
  "luminance": 0.11919
}

Semantic roles & 50–950 ramp

primary

#3F59BE

secondary

#C9BE8F

accent

#BD4EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #3F59BE

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

Preview Lab → · Contrast checker → · Palette generator →