#3F5BD3#3F5BD3

#3F5BD3 is a mid, vivid blue. Relative luminance 0.132; OKLCH L 52.1% C 0.187 H 269.0°. Best body text is #FFFFFF at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BD3
RGB	rgb(63, 91, 211)
HSL	hsl(229, 63%, 54%)
HSV	hsv(229, 70%, 83%)
CMYK	cmyk(70.1%, 56.9%, 0%, 17.3%)
CIE-LAB	lab(43.12, 29.85, -64.94)
CIE-LCH	lch(43.12, 71.47, 294.69°)
OKLab	oklab(52.1% -0.0034 -0.1871)
OKLCH	oklch(52.1% 0.187 269)
XYZ	xyz(17.5448, 13.2403, 63.2464)
Luminance	0.1324 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BD3 #D3B73F

analogous

#3FA5D3 #3F5BD3 #6D3FD3

triadic

#3F5BD3 #D33F5B #5BD33F

tetradic

#3F5BD3 #D33FA5 #D3B73F #3FD36D

square

#3F5BD3 #D33FA5 #D3B73F #3FD36D

split-complementary

#3F5BD3 #D36D3F #A5D33F

monochromatic

#1C2E7B #2841AD #3F5BD3 #7186DE #A3B0EA

Accessibility & contrast

On white

5.76

#3F5BD3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.65

#3F5BD3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BD3

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BD3	#FFFFFF	#000000	##FFFFFF
##3F5BD3	1.00	5.76	3.65	5.76
#FFFFFF	5.76	1.00	21.00	1.00
#000000	3.65	21.00	1.00	21.00
##FFFFFF	5.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006DD7

Deuteranopia (green-blind)

#005FD1

Tritanopia (blue-blind)

#00798E

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3f5bd3;
/* rgb */ color: rgb(63, 91, 211);
/* oklch */ color: oklch(52.1% 0.187 269.0);

Tailwind

colors: {
  custom: {
    50: '#8689e1',
    500: '#3f5bd3',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bd3;
$custom-light: #8689e1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bd3",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 211
  },
  "hsl": {
    "h": 228.649,
    "s": 62.712,
    "l": 53.725
  },
  "oklch": {
    "l": 0.52103,
    "c": 0.18717,
    "h": 269
  },
  "luminance": 0.13242
}

Semantic roles & 50–950 ramp

primary

#3F5BD3

secondary

#D7CB97

accent

#C742E6

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0D0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BD3

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

Preview Lab → · Contrast checker → · Palette generator →