#3F5BC5#3F5BC5

#3F5BC5 is a mid, vivid blue. Relative luminance 0.126; OKLCH L 51.0% C 0.168 H 268.6°. Best body text is #FFFFFF at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BC5
RGB	rgb(63, 91, 197)
HSL	hsl(227, 54%, 51%)
HSV	hsv(227, 68%, 77%)
CMYK	cmyk(68%, 53.8%, 0%, 22.7%)
CIE-LAB	lab(42.11, 24.85, -58.52)
CIE-LCH	lch(42.11, 63.58, 293.00°)
OKLab	oklab(51.02% -0.0041 -0.1683)
OKLCH	oklch(51.02% 0.168 268.6)
XYZ	xyz(15.8656, 12.5686, 54.4024)
Luminance	0.1257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BC5 #C5A93F

analogous

#3F9EC5 #3F5BC5 #663FC5

triadic

#3F5BC5 #C53F5B #5BC53F

tetradic

#3F5BC5 #C53F9E #C5A93F #3FC566

square

#3F5BC5 #C53F9E #C5A93F #3FC566

split-complementary

#3F5BC5 #C5663F #9EC53F

monochromatic

#202F6A #2E4499 #3F5BC5 #6E83D3 #9DABE1

Accessibility & contrast

On white

5.98

#3F5BC5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.51

#3F5BC5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BC5

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BC5	#FFFFFF	#000000	##FFFFFF
##3F5BC5	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)

#0B6AC9

Deuteranopia (green-blind)

#005EC3

Tritanopia (blue-blind)

#007487

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f5bc5;
/* rgb */ color: rgb(63, 91, 197);
/* oklch */ color: oklch(51.0% 0.168 268.6);

Tailwind

colors: {
  custom: {
    50: '#8389d7',
    500: '#3f5bc5',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bc5;
$custom-light: #8389d7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bc5",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 197
  },
  "hsl": {
    "h": 227.463,
    "s": 53.6,
    "l": 50.98
  },
  "oklch": {
    "l": 0.51018,
    "c": 0.16832,
    "h": 268.6
  },
  "luminance": 0.1257
}

Semantic roles & 50–950 ramp

primary

#3F5BC5

secondary

#CEC192

accent

#BE4BDD

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #3F5BC5

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

Preview Lab → · Contrast checker → · Palette generator →