#3F53BC#3F53BC

#3F53BC is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.8% C 0.166 H 270.8°. Best body text is #FFFFFF at 6.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F53BC
RGB	rgb(63, 83, 188)
HSL	hsl(230, 50%, 49%)
HSV	hsv(230, 66%, 74%)
CMYK	cmyk(66.5%, 55.9%, 0%, 26.3%)
CIE-LAB	lab(39.37, 26.77, -57.72)
CIE-LCH	lch(39.37, 63.63, 294.88°)
OKLab	oklab(48.75% 0.0024 -0.166)
OKLCH	oklch(48.75% 0.166 270.8)
XYZ	xyz(14.2172, 10.8728, 48.9166)
Luminance	0.1087 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F53BC #BCA83F

analogous

#3F92BC #3F53BC #6A3FBC

triadic

#3F53BC #BC3F53 #53BC3F

tetradic

#3F53BC #BC3F92 #BCA83F #3FBC6A

square

#3F53BC #BC3F92 #BCA83F #3FBC6A

split-complementary

#3F53BC #BC6A3F #92BC3F

monochromatic

#202B60 #303F8E #3F53BC #6B7BCD #99A4DD

Accessibility & contrast

On white

6.61

#3F53BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.17

#3F53BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F53BC

6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F53BC	#FFFFFF	#000000	##FFFFFF
##3F53BC	1.00	6.61	3.17	6.61
#FFFFFF	6.61	1.00	21.00	1.00
#000000	3.17	21.00	1.00	21.00
##FFFFFF	6.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063C0

Deuteranopia (green-blind)

#0057BA

Tritanopia (blue-blind)

#006C7F

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f53bc;
/* rgb */ color: rgb(63, 83, 188);
/* oklch */ color: oklch(48.8% 0.166 270.8);

Tailwind

colors: {
  custom: {
    50: '#8283d1',
    500: '#3f53bc',
    950: '#000000',
  },
}

SCSS

$custom: #3f53bc;
$custom-light: #8283d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3f53bc",
  "rgb": {
    "r": 63,
    "g": 83,
    "b": 188
  },
  "hsl": {
    "h": 230.4,
    "s": 49.801,
    "l": 49.216
  },
  "oklch": {
    "l": 0.48754,
    "c": 0.16604,
    "h": 270.8
  },
  "luminance": 0.10874
}

Semantic roles & 50–950 ramp

primary

#3F53BC

secondary

#C9BF8E

accent

#C34ED9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #3F53BC

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

Preview Lab → · Contrast checker → · Palette generator →