#3F5BCD#3F5BCD

#3F5BCD is a mid, vivid blue. Relative luminance 0.129; OKLCH L 51.6% C 0.179 H 268.8°. Best body text is #FFFFFF at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BCD
RGB	rgb(63, 91, 205)
HSL	hsl(228, 59%, 53%)
HSV	hsv(228, 69%, 80%)
CMYK	cmyk(69.3%, 55.6%, 0%, 19.6%)
CIE-LAB	lab(42.68, 27.71, -62.21)
CIE-LCH	lch(42.68, 68.10, 294.01°)
OKLab	oklab(51.63% -0.0036 -0.1791)
OKLCH	oklch(51.63% 0.179 268.8)
XYZ	xyz(16.8066, 12.9450, 59.3587)
Luminance	0.1295 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BCD #CDB13F

analogous

#3FA2CD #3F5BCD #6A3FCD

triadic

#3F5BCD #CD3F5B #5BCD3F

tetradic

#3F5BCD #CD3FA2 #CDB13F #3FCD6A

square

#3F5BCD #CD3FA2 #CDB13F #3FCD6A

split-complementary

#3F5BCD #CD6A3F #A2CD3F

monochromatic

#1E2F74 #2B43A4 #3F5BCD #7084DA #A0AEE6

Accessibility & contrast

On white

5.85

#3F5BCD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.59

#3F5BCD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BCD

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BCD	#FFFFFF	#000000	##FFFFFF
##3F5BCD	1.00	5.85	3.59	5.85
#FFFFFF	5.85	1.00	21.00	1.00
#000000	3.59	21.00	1.00	21.00
##FFFFFF	5.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CD1

Deuteranopia (green-blind)

#005FCB

Tritanopia (blue-blind)

#00778B

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f5bcd;
/* rgb */ color: rgb(63, 91, 205);
/* oklch */ color: oklch(51.6% 0.179 268.8);

Tailwind

colors: {
  custom: {
    50: '#8589dd',
    500: '#3f5bcd',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bcd;
$custom-light: #8589dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bcd",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 205
  },
  "hsl": {
    "h": 228.169,
    "s": 58.678,
    "l": 52.549
  },
  "oklch": {
    "l": 0.51632,
    "c": 0.17916,
    "h": 268.8
  },
  "luminance": 0.12947
}

Semantic roles & 50–950 ramp

primary

#3F5BCD

secondary

#D3C795

accent

#C346E2

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BCD

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

Preview Lab → · Contrast checker → · Palette generator →