#4B78CC#4B78CC

#4B78CC is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.1% C 0.139 H 261.8°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#4B78CC
RGB	rgb(75, 120, 204)
HSL	hsl(219, 56%, 55%)
HSV	hsv(219, 63%, 80%)
CMYK	cmyk(63.2%, 41.2%, 0%, 20%)
CIE-LAB	lab(51.02, 11.04, -48.19)
CIE-LCH	lch(51.02, 49.44, 282.90°)
OKLab	oklab(58.13% -0.0198 -0.1373)
OKLCH	oklch(58.13% 0.139 261.8)
XYZ	xyz(20.5134, 19.2865, 59.7567)
Luminance	0.1929 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B78CC #CC9F4B

analogous

#4BB8CC #4B78CC #5F4BCC

triadic

#4B78CC #CC4B78 #78CC4B

tetradic

#4B78CC #CC4BB8 #CC9F4B #4BCC5F

square

#4B78CC #CC4BB8 #CC9F4B #4BCC5F

split-complementary

#4B78CC #CC5F4B #B8CC4B

monochromatic

#23417A #305BAA #4B78CC #7B9CDA #AAC0E7

Accessibility & contrast

On white

4.32

#4B78CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#4B78CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4B78CC

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B78CC	#FFFFFF	#000000	##000000
##4B78CC	1.00	4.32	4.86	4.86
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.86	21.00	1.00	1.00
##000000	4.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5280CF

Deuteranopia (green-blind)

#3F74CA

Tritanopia (blue-blind)

#008B98

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4b78cc;
/* rgb */ color: rgb(75, 120, 204);
/* oklch */ color: oklch(58.1% 0.139 261.8);

Tailwind

colors: {
  custom: {
    50: '#899edc',
    500: '#4b78cc',
    950: '#000000',
  },
}

SCSS

$custom: #4b78cc;
$custom-light: #899edc;
$custom-dark: #000000;

JSON

{
  "hex": "#4b78cc",
  "rgb": {
    "r": 75,
    "g": 120,
    "b": 204
  },
  "hsl": {
    "h": 219.07,
    "s": 55.844,
    "l": 54.706
  },
  "oklch": {
    "l": 0.58127,
    "c": 0.13869,
    "h": 261.8
  },
  "luminance": 0.19288
}

Semantic roles & 50–950 ramp

primary

#4B78CC

secondary

#D5C29E

accent

#AB49DF

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0D0E15

muted

#7D7E83

Preview Lab

Preview with #4B78CC

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

Preview Lab → · Contrast checker → · Palette generator →