#4078CB#4078CB

#4078CB is a mid, vivid blue. Relative luminance 0.188; OKLCH L 57.6% C 0.141 H 258.2°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#4078CB
RGB	rgb(64, 120, 203)
HSL	hsl(216, 57%, 52%)
HSV	hsv(216, 68%, 80%)
CMYK	cmyk(68.5%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.49, 8.83, -48.50)
CIE-LCH	lch(50.49, 49.29, 280.32°)
OKLab	oklab(57.57% -0.0289 -0.1383)
OKLCH	oklch(57.57% 0.141 258.2)
XYZ	xyz(19.6064, 18.8327, 59.0901)
Luminance	0.1883 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4078CB #CB9340

analogous

#40BECB #4078CB #4D40CB

triadic

#4078CB #CB4078 #78CB40

tetradic

#4078CB #CB40BE #CB9340 #40CB4D

square

#4078CB #CB40BE #CB9340 #40CB4D

split-complementary

#4078CB #CB4D40 #BECB40

monochromatic

#1F4072 #2C5BA2 #4078CB #709AD8 #A0BCE5

Accessibility & contrast

On white

4.41

#4078CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#4078CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4078CB

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4078CB	#FFFFFF	#000000	##000000
##4078CB	1.00	4.41	4.77	4.77
#FFFFFF	4.41	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#517FCE

Deuteranopia (green-blind)

#3B72C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4078cb;
/* rgb */ color: rgb(64, 120, 203);
/* oklch */ color: oklch(57.6% 0.141 258.2);

Tailwind

colors: {
  custom: {
    50: '#849edb',
    500: '#4078cb',
    950: '#000000',
  },
}

SCSS

$custom: #4078cb;
$custom-light: #849edb;
$custom-dark: #000000;

JSON

{
  "hex": "#4078cb",
  "rgb": {
    "r": 64,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 215.827,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.57568,
    "c": 0.14132,
    "h": 258.2
  },
  "luminance": 0.18835
}

Semantic roles & 50–950 ramp

primary

#4078CB

secondary

#D2B995

accent

#A347E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4078CB

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

Preview Lab → · Contrast checker → · Palette generator →