#3F58CC#3F58CC

#3F58CC is a mid, vivid blue. Relative luminance 0.124; OKLCH L 51.0% C 0.181 H 269.6°. Best body text is #FFFFFF at 6.04:1 contrast (WCAG AA passes).

Color values

HEX	#3F58CC
RGB	rgb(63, 88, 204)
HSL	hsl(229, 58%, 52%)
HSV	hsv(229, 69%, 80%)
CMYK	cmyk(69.1%, 56.9%, 0%, 20%)
CIE-LAB	lab(41.84, 29.26, -63.00)
CIE-LCH	lch(41.84, 69.47, 294.91°)
OKLab	oklab(50.98% -0.0012 -0.1815)
OKLCH	oklch(50.98% 0.182 269.6)
XYZ	xyz(16.4350, 12.3942, 58.6412)
Luminance	0.1240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F58CC #CCB33F

analogous

#3F9ECC #3F58CC #6D3FCC

triadic

#3F58CC #CC3F58 #58CC3F

tetradic

#3F58CC #CC3F9E #CCB33F #3FCC6D

square

#3F58CC #CC3F9E #CCB33F #3FCC6D

split-complementary

#3F58CC #CC6D3F #9ECC3F

monochromatic

#1E2D72 #2B40A3 #3F58CC #6F82D9 #A0ACE6

Accessibility & contrast

On white

6.04

#3F58CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.48

#3F58CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F58CC

6.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F58CC	#FFFFFF	#000000	##FFFFFF
##3F58CC	1.00	6.04	3.48	6.04
#FFFFFF	6.04	1.00	21.00	1.00
#000000	3.48	21.00	1.00	21.00
##FFFFFF	6.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069D0

Deuteranopia (green-blind)

#005CCA

Tritanopia (blue-blind)

#007489

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f58cc;
/* rgb */ color: rgb(63, 88, 204);
/* oklch */ color: oklch(51.0% 0.181 269.6);

Tailwind

colors: {
  custom: {
    50: '#8586dc',
    500: '#3f58cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f58cc;
$custom-light: #8586dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f58cc",
  "rgb": {
    "r": 63,
    "g": 88,
    "b": 204
  },
  "hsl": {
    "h": 229.362,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.50976,
    "c": 0.1815,
    "h": 269.6
  },
  "luminance": 0.12396
}

Semantic roles & 50–950 ramp

primary

#3F58CC

secondary

#D2C795

accent

#C647E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F58CC

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

Preview Lab → · Contrast checker → · Palette generator →