#3F5BC7#3F5BC7

#3F5BC7 is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.2% C 0.171 H 268.7°. Best body text is #FFFFFF at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#3F5BC7
RGB	rgb(63, 91, 199)
HSL	hsl(228, 55%, 51%)
HSV	hsv(228, 68%, 78%)
CMYK	cmyk(68.3%, 54.3%, 0%, 22%)
CIE-LAB	lab(42.25, 25.56, -59.45)
CIE-LCH	lch(42.25, 64.71, 293.27°)
OKLab	oklab(51.17% -0.0039 -0.171)
OKLCH	oklch(51.17% 0.171 268.7)
XYZ	xyz(16.0962, 12.6609, 55.6173)
Luminance	0.1266 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5BC7 #C7AB3F

analogous

#3F9FC7 #3F5BC7 #673FC7

triadic

#3F5BC7 #C73F5B #5BC73F

tetradic

#3F5BC7 #C73F9F #C7AB3F #3FC767

square

#3F5BC7 #C73F9F #C7AB3F #3FC767

split-complementary

#3F5BC7 #C7673F #9FC73F

monochromatic

#202F6C #2D449B #3F5BC7 #6E83D5 #9EACE3

Accessibility & contrast

On white

5.94

#3F5BC7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.53

#3F5BC7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5BC7

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5BC7	#FFFFFF	#000000	##FFFFFF
##3F5BC7	1.00	5.94	3.53	5.94
#FFFFFF	5.94	1.00	21.00	1.00
#000000	3.53	21.00	1.00	21.00
##FFFFFF	5.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#026ACB

Deuteranopia (green-blind)

#005EC5

Tritanopia (blue-blind)

#007588

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f5bc7;
/* rgb */ color: rgb(63, 91, 199);
/* oklch */ color: oklch(51.2% 0.171 268.7);

Tailwind

colors: {
  custom: {
    50: '#8489d9',
    500: '#3f5bc7',
    950: '#000000',
  },
}

SCSS

$custom: #3f5bc7;
$custom-light: #8489d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5bc7",
  "rgb": {
    "r": 63,
    "g": 91,
    "b": 199
  },
  "hsl": {
    "h": 227.647,
    "s": 54.839,
    "l": 51.373
  },
  "oklch": {
    "l": 0.5117,
    "c": 0.17105,
    "h": 268.7
  },
  "luminance": 0.12662
}

Semantic roles & 50–950 ramp

primary

#3F5BC7

secondary

#CFC393

accent

#C04ADE

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F5BC7

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

Preview Lab → · Contrast checker → · Palette generator →