#3F5ACB#3F5ACB

#3F5ACB is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.3% C 0.178 H 269.1°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#3F5ACB
RGB	rgb(63, 90, 203)
HSL	hsl(228, 57%, 52%)
HSV	hsv(228, 69%, 80%)
CMYK	cmyk(69%, 55.7%, 0%, 20.4%)
CIE-LAB	lab(42.28, 27.63, -61.71)
CIE-LCH	lch(42.28, 67.62, 294.12°)
OKLab	oklab(51.28% -0.0029 -0.1777)
OKLCH	oklch(51.28% 0.178 269.1)
XYZ	xyz(16.4819, 12.6793, 58.0671)
Luminance	0.1268 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5ACB #CBB03F

analogous

#3FA0CB #3F5ACB #6A3FCB

triadic

#3F5ACB #CB3F5A #5ACB3F

tetradic

#3F5ACB #CB3FA0 #CBB03F #3FCB6A

square

#3F5ACB #CB3FA0 #CBB03F #3FCB6A

split-complementary

#3F5ACB #CB6A3F #A0CB3F

monochromatic

#1F2E71 #2C42A1 #3F5ACB #6F83D8 #9FADE5

Accessibility & contrast

On white

5.94

#3F5ACB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#3F5ACB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5ACB

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5ACB	#FFFFFF	#000000	##FFFFFF
##3F5ACB	1.00	5.94	3.54	5.94
#FFFFFF	5.94	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006ACF

Deuteranopia (green-blind)

#005EC9

Tritanopia (blue-blind)

#00758A

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f5acb;
/* rgb */ color: rgb(63, 90, 203);
/* oklch */ color: oklch(51.3% 0.178 269.1);

Tailwind

colors: {
  custom: {
    50: '#8588dc',
    500: '#3f5acb',
    950: '#000000',
  },
}

SCSS

$custom: #3f5acb;
$custom-light: #8588dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5acb",
  "rgb": {
    "r": 63,
    "g": 90,
    "b": 203
  },
  "hsl": {
    "h": 228.429,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.51282,
    "c": 0.17769,
    "h": 269.1
  },
  "luminance": 0.12681
}

Semantic roles & 50–950 ramp

primary

#3F5ACB

secondary

#D1C694

accent

#C347E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5ACB

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

Preview Lab → · Contrast checker → · Palette generator →