#3F59CC#3F59CC

#3F59CC is a mid, vivid blue. Relative luminance 0.126; OKLCH L 51.2% C 0.180 H 269.4°. Best body text is #FFFFFF at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#3F59CC
RGB	rgb(63, 89, 204)
HSL	hsl(229, 58%, 52%)
HSV	hsv(229, 69%, 80%)
CMYK	cmyk(69.1%, 56.4%, 0%, 20%)
CIE-LAB	lab(42.09, 28.63, -62.59)
CIE-LCH	lch(42.09, 68.82, 294.58°)
OKLab	oklab(51.17% -0.002 -0.1803)
OKLCH	oklch(51.17% 0.18 269.4)
XYZ	xyz(16.5176, 12.5595, 58.6688)
Luminance	0.1256 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59CC #CCB23F

analogous

#3FA0CC #3F59CC #6B3FCC

triadic

#3F59CC #CC3F59 #59CC3F

tetradic

#3F59CC #CC3FA0 #CCB23F #3FCC6B

square

#3F59CC #CC3FA0 #CCB23F #3FCC6B

split-complementary

#3F59CC #CC6B3F #A0CC3F

monochromatic

#1E2E72 #2B41A3 #3F59CC #6F83D9 #A0ADE6

Accessibility & contrast

On white

5.98

#3F59CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.51

#3F59CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59CC

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59CC	#FFFFFF	#000000	##FFFFFF
##3F59CC	1.00	5.98	3.51	5.98
#FFFFFF	5.98	1.00	21.00	1.00
#000000	3.51	21.00	1.00	21.00
##FFFFFF	5.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD0

Deuteranopia (green-blind)

#005DCA

Tritanopia (blue-blind)

#00758A

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f59cc;
/* rgb */ color: rgb(63, 89, 204);
/* oklch */ color: oklch(51.2% 0.180 269.4);

Tailwind

colors: {
  custom: {
    50: '#8587dc',
    500: '#3f59cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f59cc;
$custom-light: #8587dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59cc",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 204
  },
  "hsl": {
    "h": 228.936,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.51167,
    "c": 0.18027,
    "h": 269.4
  },
  "luminance": 0.12561
}

Semantic roles & 50–950 ramp

primary

#3F59CC

secondary

#D2C795

accent

#C547E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F59CC

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

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