#3F5CBF#3F5CBF

#3F5CBF is a mid, vivid blue. Relative luminance 0.125; OKLCH L 50.8% C 0.159 H 268.0°. Best body text is #FFFFFF at 6.01:1 contrast (WCAG AA passes).

Color values

HEX	#3F5CBF
RGB	rgb(63, 92, 191)
HSL	hsl(226, 50%, 50%)
HSV	hsv(226, 67%, 75%)
CMYK	cmyk(67%, 51.8%, 0%, 25.1%)
CIE-LAB	lab(41.96, 22.05, -55.28)
CIE-LCH	lch(41.96, 59.52, 291.75°)
OKLab	oklab(50.77% -0.0054 -0.1587)
OKLCH	oklch(50.77% 0.159 268)
XYZ	xyz(15.2778, 12.4712, 50.8822)
Luminance	0.1247 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5CBF #BFA23F

analogous

#3F9CBF #3F5CBF #623FBF

triadic

#3F5CBF #BF3F5C #5CBF3F

tetradic

#3F5CBF #BF3F9C #BFA23F #3FBF62

square

#3F5CBF #BF3F9C #BFA23F #3FBF62

split-complementary

#3F5CBF #BF623F #9CBF3F

monochromatic

#213063 #304691 #3F5CBF #6D83CF #9BAADE

Accessibility & contrast

On white

6.01

#3F5CBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#3F5CBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5CBF

6.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5CBF	#FFFFFF	#000000	##FFFFFF
##3F5CBF	1.00	6.01	3.49	6.01
#FFFFFF	6.01	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F69C3

Deuteranopia (green-blind)

#005DBD

Tritanopia (blue-blind)

#007384

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #3f5cbf;
/* rgb */ color: rgb(63, 92, 191);
/* oklch */ color: oklch(50.8% 0.159 268.0);

Tailwind

colors: {
  custom: {
    50: '#8289d3',
    500: '#3f5cbf',
    950: '#000000',
  },
}

SCSS

$custom: #3f5cbf;
$custom-light: #8289d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5cbf",
  "rgb": {
    "r": 63,
    "g": 92,
    "b": 191
  },
  "hsl": {
    "h": 226.406,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.50772,
    "c": 0.15881,
    "h": 268
  },
  "luminance": 0.12473
}

Semantic roles & 50–950 ramp

primary

#3F5CBF

secondary

#CABD90

accent

#BA4EDA

background

#F8F8FD

surface

#F0F0FA

border

#CBCBD3

text

#0C0B14

muted

#7D7C83

Preview Lab

Preview with #3F5CBF

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

Preview Lab → · Contrast checker → · Palette generator →