#3F5BD0#3F5BD0

#3F5BD0 is a mid, vivid blue. Relative luminance 0.131; OKLCH L 51.9% C 0.183 H 268.9°. Best body text is #FFFFFF at 5.80:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BD0
RGB	rgb(63, 91, 208)
HSL	hsl(228, 61%, 53%)
HSV	hsv(228, 70%, 82%)
CMYK	cmyk(69.7%, 56.2%, 0%, 18.4%)
CIE-LAB	lab(42.90, 28.78, -63.58)
CIE-LCH	lch(42.90, 69.79, 294.35°)
OKLab	oklab(51.87% -0.0035 -0.1831)
OKLCH	oklch(51.87% 0.183 268.9)
XYZ	xyz(17.1722, 13.0913, 61.2842)
Luminance	0.1309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BD0 #D0B43F

analogous

#3FA3D0 #3F5BD0 #6B3FD0

triadic

#3F5BD0 #D03F5B #5BD03F

tetradic

#3F5BD0 #D03FA3 #D0B43F #3FD06B

square

#3F5BD0 #D03FA3 #D0B43F #3FD06B

split-complementary

#3F5BD0 #D06B3F #A3D03F

monochromatic

#1D2F77 #2942A9 #3F5BD0 #7085DC #A1AFE8

Accessibility & contrast

On white

5.80

#3F5BD0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.62

#3F5BD0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BD0

5.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BD0	#FFFFFF	#000000	##FFFFFF
##3F5BD0	1.00	5.80	3.62	5.80
#FFFFFF	5.80	1.00	21.00	1.00
#000000	3.62	21.00	1.00	21.00
##FFFFFF	5.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006CD4

Deuteranopia (green-blind)

#005FCE

Tritanopia (blue-blind)

#00788C

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3f5bd0;
/* rgb */ color: rgb(63, 91, 208);
/* oklch */ color: oklch(51.9% 0.183 268.9);

Tailwind

colors: {
  custom: {
    50: '#8689df',
    500: '#3f5bd0',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bd0;
$custom-light: #8689df;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bd0",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 208
  },
  "hsl": {
    "h": 228.414,
    "s": 60.669,
    "l": 53.137
  },
  "oklch": {
    "l": 0.51866,
    "c": 0.18317,
    "h": 268.9
  },
  "luminance": 0.13093
}

Semantic roles & 50–950 ramp

primary

#3F5BD0

secondary

#D5C996

accent

#C544E4

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BD0

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

Preview Lab → · Contrast checker → · Palette generator →