#3B63BB#3B63BB

#3B63BB is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.7% C 0.146 H 263.7°. Best body text is #FFFFFF at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#3B63BB
RGB	rgb(59, 99, 187)
HSL	hsl(221, 52%, 48%)
HSV	hsv(221, 68%, 73%)
CMYK	cmyk(68.4%, 47.1%, 0%, 26.7%)
CIE-LAB	lab(43.42, 15.47, -50.61)
CIE-LCH	lch(43.42, 52.92, 287.00°)
OKLab	oklab(51.75% -0.016 -0.1449)
OKLCH	oklch(51.75% 0.146 263.7)
XYZ	xyz(15.2320, 13.4398, 48.7955)
Luminance	0.1344 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B63BB #BB933B

analogous

#3BA3BB #3B63BB #533BBB

triadic

#3B63BB #BB3B63 #63BB3B

tetradic

#3B63BB #BB3BA3 #BB933B #3BBB53

square

#3B63BB #BB3BA3 #BB933B #3BBB53

split-complementary

#3B63BB #BB533B #A3BB3B

monochromatic

#1E325E #2C4A8C #3B63BB #6586CE #93AADD

Accessibility & contrast

On white

5.69

#3B63BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#3B63BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B63BB

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B63BB	#FFFFFF	#000000	##FFFFFF
##3B63BB	1.00	5.69	3.69	5.69
#FFFFFF	5.69	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#356DBE

Deuteranopia (green-blind)

#1A61B9

Tritanopia (blue-blind)

#007786

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3b63bb;
/* rgb */ color: rgb(59, 99, 187);
/* oklch */ color: oklch(51.7% 0.146 263.7);

Tailwind

colors: {
  custom: {
    50: '#7f8ed0',
    500: '#3b63bb',
    950: '#000000',
  },
}

SCSS

$custom: #3b63bb;
$custom-light: #7f8ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3b63bb",
  "rgb": {
    "r": 59,
    "g": 99,
    "b": 187
  },
  "hsl": {
    "h": 221.25,
    "s": 52.033,
    "l": 48.235
  },
  "oklch": {
    "l": 0.5175,
    "c": 0.14582,
    "h": 263.7
  },
  "luminance": 0.13441
}

Semantic roles & 50–950 ramp

primary

#3B63BB

secondary

#C8B58A

accent

#AF4CDB

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3B63BB

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

Preview Lab → · Contrast checker → · Palette generator →