#3F59CF#3F59CF

#3F59CF is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.4% C 0.184 H 269.4°. Best body text is #FFFFFF at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#3F59CF
RGB	rgb(63, 89, 207)
HSL	hsl(229, 60%, 53%)
HSV	hsv(229, 70%, 81%)
CMYK	cmyk(69.6%, 57%, 0%, 18.8%)
CIE-LAB	lab(42.31, 29.70, -63.95)
CIE-LCH	lch(42.31, 70.51, 294.91°)
OKLab	oklab(51.41% -0.0019 -0.1843)
OKLCH	oklch(51.41% 0.184 269.4)
XYZ	xyz(16.8809, 12.7048, 60.5820)
Luminance	0.1271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59CF #CFB53F

analogous

#3FA1CF #3F59CF #6D3FCF

triadic

#3F59CF #CF3F59 #59CF3F

tetradic

#3F59CF #CF3FA1 #CFB53F #3FCF6D

square

#3F59CF #CF3FA1 #CFB53F #3FCF6D

split-complementary

#3F59CF #CF6D3F #A1CF3F

monochromatic

#1E2E76 #2A40A7 #3F59CF #7083DB #A1AEE7

Accessibility & contrast

On white

5.93

#3F59CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#3F59CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59CF

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59CF	#FFFFFF	#000000	##FFFFFF
##3F59CF	1.00	5.93	3.54	5.93
#FFFFFF	5.93	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BD3

Deuteranopia (green-blind)

#005DCD

Tritanopia (blue-blind)

#00768B

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f59cf;
/* rgb */ color: rgb(63, 89, 207);
/* oklch */ color: oklch(51.4% 0.184 269.4);

Tailwind

colors: {
  custom: {
    50: '#8687df',
    500: '#3f59cf',
    950: '#000000',
  },
}

SCSS

$custom: #3f59cf;
$custom-light: #8687df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59cf",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 207
  },
  "hsl": {
    "h": 229.167,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.51405,
    "c": 0.18429,
    "h": 269.4
  },
  "luminance": 0.12707
}

Semantic roles & 50–950 ramp

primary

#3F59CF

secondary

#D4C996

accent

#C745E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F59CF

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

Preview Lab → · Contrast checker → · Palette generator →