#3F59CE#3F59CE

#3F59CE is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.3% C 0.183 H 269.4°. Best body text is #FFFFFF at 5.95:1 contrast (WCAG AA passes).

Color values

HEX	#3F59CE
RGB	rgb(63, 89, 206)
HSL	hsl(229, 59%, 53%)
HSV	hsv(229, 69%, 81%)
CMYK	cmyk(69.4%, 56.8%, 0%, 19.2%)
CIE-LAB	lab(42.24, 29.34, -63.50)
CIE-LCH	lch(42.24, 69.95, 294.80°)
OKLab	oklab(51.33% -0.002 -0.1829)
OKLCH	oklch(51.33% 0.183 269.4)
XYZ	xyz(16.7590, 12.6561, 59.9402)
Luminance	0.1266 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59CE #CEB43F

analogous

#3FA0CE #3F59CE #6C3FCE

triadic

#3F59CE #CE3F59 #59CE3F

tetradic

#3F59CE #CE3FA0 #CEB43F #3FCE6C

square

#3F59CE #CE3FA0 #CEB43F #3FCE6C

split-complementary

#3F59CE #CE6C3F #A0CE3F

monochromatic

#1E2E75 #2A41A6 #3F59CE #7083DA #A1ADE7

Accessibility & contrast

On white

5.95

#3F59CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#3F59CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59CE

5.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59CE	#FFFFFF	#000000	##FFFFFF
##3F59CE	1.00	5.95	3.53	5.95
#FFFFFF	5.95	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD2

Deuteranopia (green-blind)

#005DCC

Tritanopia (blue-blind)

#00768B

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f59ce;
/* rgb */ color: rgb(63, 89, 206);
/* oklch */ color: oklch(51.3% 0.183 269.4);

Tailwind

colors: {
  custom: {
    50: '#8587de',
    500: '#3f59ce',
    950: '#000000',
  },
}

SCSS

$custom: #3f59ce;
$custom-light: #8587de;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59ce",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 206
  },
  "hsl": {
    "h": 229.091,
    "s": 59.336,
    "l": 52.745
  },
  "oklch": {
    "l": 0.51325,
    "c": 0.18295,
    "h": 269.4
  },
  "luminance": 0.12658
}

Semantic roles & 50–950 ramp

primary

#3F59CE

secondary

#D3C895

accent

#C645E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F59CE

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

Preview Lab → · Contrast checker → · Palette generator →