#4B78CB#4B78CB

#4B78CB is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.1% C 0.137 H 261.6°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#4B78CB
RGB	rgb(75, 120, 203)
HSL	hsl(219, 55%, 55%)
HSV	hsv(219, 63%, 80%)
CMYK	cmyk(63.1%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.97, 10.69, -47.71)
CIE-LCH	lch(50.97, 48.90, 282.63°)
OKLab	oklab(58.07% -0.02 -0.1358)
OKLCH	oklch(58.07% 0.137 261.6)
XYZ	xyz(20.3938, 19.2387, 59.1270)
Luminance	0.1924 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B78CB #CB9E4B

analogous

#4BB8CB #4B78CB #5E4BCB

triadic

#4B78CB #CB4B78 #78CB4B

tetradic

#4B78CB #CB4BB8 #CB9E4B #4BCB5E

square

#4B78CB #CB4BB8 #CB9E4B #4BCB5E

split-complementary

#4B78CB #CB5E4B #B8CB4B

monochromatic

#234179 #315BA8 #4B78CB #7A9CD9 #AABFE6

Accessibility & contrast

On white

4.33

#4B78CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#4B78CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4B78CB

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B78CB	#FFFFFF	#000000	##000000
##4B78CB	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5380CE

Deuteranopia (green-blind)

#4074C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4b78cb;
/* rgb */ color: rgb(75, 120, 203);
/* oklch */ color: oklch(58.1% 0.137 261.6);

Tailwind

colors: {
  custom: {
    50: '#899edb',
    500: '#4b78cb',
    950: '#000000',
  },
}

SCSS

$custom: #4b78cb;
$custom-light: #899edb;
$custom-dark: #000000;

JSON

{
  "hex": "#4b78cb",
  "rgb": {
    "r": 75,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 218.906,
    "s": 55.172,
    "l": 54.51
  },
  "oklch": {
    "l": 0.58066,
    "c": 0.13732,
    "h": 261.6
  },
  "luminance": 0.19241
}

Semantic roles & 50–950 ramp

primary

#4B78CB

secondary

#D4C19E

accent

#AA49DF

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0D0E15

muted

#7D7E83

Preview Lab

Preview with #4B78CB

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

Preview Lab → · Contrast checker → · Palette generator →