#4063CB#4063CB

#4063CB is a mid, vivid blue. Relative luminance 0.143; OKLCH L 53.1% C 0.166 H 266.7°. Best body text is #FFFFFF at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#4063CB
RGB	rgb(64, 99, 203)
HSL	hsl(225, 57%, 52%)
HSV	hsv(225, 68%, 80%)
CMYK	cmyk(68.5%, 51.2%, 0%, 20.4%)
CIE-LAB	lab(44.69, 22.03, -57.80)
CIE-LCH	lch(44.69, 61.85, 290.87°)
OKLab	oklab(53.12% -0.0096 -0.166)
OKLCH	oklch(53.12% 0.166 266.7)
XYZ	xyz(17.3519, 14.3238, 58.3386)
Luminance	0.1432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4063CB #CBA840

analogous

#40A9CB #4063CB #6240CB

triadic

#4063CB #CB4063 #63CB40

tetradic

#4063CB #CB40A9 #CBA840 #40CB62

square

#4063CB #CB40A9 #CBA840 #40CB62

split-complementary

#4063CB #CB6240 #A9CB40

monochromatic

#1F3472 #2C4AA2 #4063CB #708AD8 #A0B2E5

Accessibility & contrast

On white

5.43

#4063CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.86

#4063CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4063CB

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4063CB	#FFFFFF	#000000	##FFFFFF
##4063CB	1.00	5.43	3.86	5.43
#FFFFFF	5.43	1.00	21.00	1.00
#000000	3.86	21.00	1.00	21.00
##FFFFFF	5.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2370CF

Deuteranopia (green-blind)

#0064C9

Tritanopia (blue-blind)

#007C8D

Achromatopsia (no color)

#6A6A6A

Design tokens & code

CSS

--color: #4063cb;
/* rgb */ color: rgb(64, 99, 203);
/* oklch */ color: oklch(53.1% 0.166 266.7);

Tailwind

colors: {
  custom: {
    50: '#858edb',
    500: '#4063cb',
    950: '#000000',
  },
}

SCSS

$custom: #4063cb;
$custom-light: #858edb;
$custom-dark: #000000;

JSON

{
  "hex": "#4063cb",
  "rgb": {
    "r": 64,
    "g": 99,
    "b": 203
  },
  "hsl": {
    "h": 224.892,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.53119,
    "c": 0.16628,
    "h": 266.7
  },
  "luminance": 0.14325
}

Semantic roles & 50–950 ramp

primary

#4063CB

secondary

#D2C295

accent

#BA47E0

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #4063CB

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

Preview Lab → · Contrast checker → · Palette generator →