#3F53BF#3F53BF

#3F53BF is a mid, vivid blue. Relative luminance 0.110; OKLCH L 49.0% C 0.170 H 270.8°. Best body text is #FFFFFF at 6.56:1 contrast (WCAG AA passes).

Color values

HEX	#3F53BF
RGB	rgb(63, 83, 191)
HSL	hsl(231, 50%, 50%)
HSV	hsv(231, 67%, 75%)
CMYK	cmyk(67%, 56.5%, 0%, 25.1%)
CIE-LAB	lab(39.59, 27.84, -59.11)
CIE-LCH	lch(39.59, 65.34, 295.22°)
OKLab	oklab(48.99% 0.0025 -0.1701)
OKLCH	oklch(48.99% 0.17 270.8)
XYZ	xyz(14.5439, 11.0035, 50.6375)
Luminance	0.1100 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F53BF #BFAB3F

analogous

#3F93BF #3F53BF #6B3FBF

triadic

#3F53BF #BF3F53 #53BF3F

tetradic

#3F53BF #BF3F93 #BFAB3F #3FBF6B

square

#3F53BF #BF3F93 #BFAB3F #3FBF6B

split-complementary

#3F53BF #BF6B3F #93BF3F

monochromatic

#212B63 #303F91 #3F53BF #6D7CCF #9BA5DE

Accessibility & contrast

On white

6.56

#3F53BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.20

#3F53BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F53BF

6.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F53BF	#FFFFFF	#000000	##FFFFFF
##3F53BF	1.00	6.56	3.20	6.56
#FFFFFF	6.56	1.00	21.00	1.00
#000000	3.20	21.00	1.00	21.00
##FFFFFF	6.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C3

Deuteranopia (green-blind)

#0058BD

Tritanopia (blue-blind)

#006D81

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f53bf;
/* rgb */ color: rgb(63, 83, 191);
/* oklch */ color: oklch(49.0% 0.170 270.8);

Tailwind

colors: {
  custom: {
    50: '#8383d3',
    500: '#3f53bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f53bf;
$custom-light: #8383d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f53bf",
  "rgb": {
    "r": 63,
    "g": 83,
    "b": 191
  },
  "hsl": {
    "h": 230.625,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.48989,
    "c": 0.17014,
    "h": 270.8
  },
  "luminance": 0.11005
}

Semantic roles & 50–950 ramp

primary

#3F53BF

secondary

#CAC190

accent

#C44EDA

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #3F53BF

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

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