#3F59D0#3F59D0

#3F59D0 is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.5% C 0.186 H 269.4°. Best body text is #FFFFFF at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#3F59D0
RGB	rgb(63, 89, 208)
HSL	hsl(229, 61%, 53%)
HSV	hsv(229, 70%, 82%)
CMYK	cmyk(69.7%, 57.2%, 0%, 18.4%)
CIE-LAB	lab(42.39, 30.05, -64.41)
CIE-LCH	lch(42.39, 71.07, 295.01°)
OKLab	oklab(51.48% -0.0019 -0.1856)
OKLCH	oklch(51.48% 0.186 269.4)
XYZ	xyz(17.0035, 12.7539, 61.2279)
Luminance	0.1276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59D0 #D0B63F

analogous

#3FA2D0 #3F59D0 #6D3FD0

triadic

#3F59D0 #D03F59 #59D03F

tetradic

#3F59D0 #D03FA2 #D0B63F #3FD06D

square

#3F59D0 #D03FA2 #D0B63F #3FD06D

split-complementary

#3F59D0 #D06D3F #A2D03F

monochromatic

#1D2D77 #2940A9 #3F59D0 #7084DC #A1AEE8

Accessibility & contrast

On white

5.91

#3F59D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#3F59D0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59D0

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59D0	#FFFFFF	#000000	##FFFFFF
##3F59D0	1.00	5.91	3.55	5.91
#FFFFFF	5.91	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BD4

Deuteranopia (green-blind)

#005ECE

Tritanopia (blue-blind)

#00768C

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f59d0;
/* rgb */ color: rgb(63, 89, 208);
/* oklch */ color: oklch(51.5% 0.186 269.4);

Tailwind

colors: {
  custom: {
    50: '#8687df',
    500: '#3f59d0',
    950: '#000000',
  },
}

SCSS

$custom: #3f59d0;
$custom-light: #8687df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59d0",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 208
  },
  "hsl": {
    "h": 229.241,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.51484,
    "c": 0.18562,
    "h": 269.4
  },
  "luminance": 0.12756
}

Semantic roles & 50–950 ramp

primary

#3F59D0

secondary

#D5C996

accent

#C744E4

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0D0B15

muted

#7D7C83

Preview Lab

Preview with #3F59D0

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

Preview Lab → · Contrast checker → · Palette generator →