#4063BB#4063BB

#4063BB is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.0% C 0.144 H 265.4°. Best body text is #FFFFFF at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#4063BB
RGB	rgb(64, 99, 187)
HSL	hsl(223, 49%, 49%)
HSV	hsv(223, 66%, 73%)
CMYK	cmyk(65.8%, 47.1%, 0%, 26.7%)
CIE-LAB	lab(43.65, 16.29, -50.21)
CIE-LCH	lch(43.65, 52.79, 287.98°)
OKLab	oklab(51.99% -0.0116 -0.1437)
OKLCH	oklch(51.99% 0.144 265.4)
XYZ	xyz(15.5427, 13.6001, 48.8101)
Luminance	0.1360 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4063BB #BB9840

analogous

#40A1BB #4063BB #5B40BB

triadic

#4063BB #BB4063 #63BB40

tetradic

#4063BB #BB40A1 #BB9840 #40BB5B

square

#4063BB #BB40A1 #BB9840 #40BB5B

split-complementary

#4063BB #BB5B40 #A1BB40

monochromatic

#213360 #304B8D #4063BB #6C87CD #99ACDC

Accessibility & contrast

On white

5.64

#4063BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#4063BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4063BB

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4063BB	#FFFFFF	#000000	##FFFFFF
##4063BB	1.00	5.64	3.72	5.64
#FFFFFF	5.64	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#366DBE

Deuteranopia (green-blind)

#1E62B9

Tritanopia (blue-blind)

#007786

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #4063bb;
/* rgb */ color: rgb(64, 99, 187);
/* oklch */ color: oklch(52.0% 0.144 265.4);

Tailwind

colors: {
  custom: {
    50: '#828ed0',
    500: '#4063bb',
    950: '#000000',
  },
}

SCSS

$custom: #4063bb;
$custom-light: #828ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#4063bb",
  "rgb": {
    "r": 64,
    "g": 99,
    "b": 187
  },
  "hsl": {
    "h": 222.927,
    "s": 49.004,
    "l": 49.216
  },
  "oklch": {
    "l": 0.51994,
    "c": 0.14417,
    "h": 265.4
  },
  "luminance": 0.13602
}

Semantic roles & 50–950 ramp

primary

#4063BB

secondary

#C8B88F

accent

#B14FD9

background

#F8F8FC

surface

#F0F0F9

border

#CBCBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #4063BB

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

Preview Lab → · Contrast checker → · Palette generator →