#4278CA#4278CA

#4278CA is a mid, vivid blue. Relative luminance 0.189; OKLCH L 57.6% C 0.139 H 258.6°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#4278CA
RGB	rgb(66, 120, 202)
HSL	hsl(216, 56%, 53%)
HSV	hsv(216, 67%, 79%)
CMYK	cmyk(67.3%, 40.6%, 0%, 20.8%)
CIE-LAB	lab(50.52, 8.80, -47.88)
CIE-LCH	lch(50.52, 48.68, 280.41°)
OKLab	oklab(57.59% -0.0276 -0.1365)
OKLCH	oklch(57.59% 0.139 258.6)
XYZ	xyz(19.6201, 18.8535, 58.4708)
Luminance	0.1885 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278CA #CA9442

analogous

#42BCCA #4278CA #5042CA

triadic

#4278CA #CA4278 #78CA42

tetradic

#4278CA #CA42BC #CA9442 #42CA50

square

#4278CA #CA42BC #CA9442 #42CA50

split-complementary

#4278CA #CA5042 #BCCA42

monochromatic

#204072 #2D5BA2 #4278CA #729AD7 #A2BCE5

Accessibility & contrast

On white

4.40

#4278CA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#4278CA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278CA

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278CA	#FFFFFF	#000000	##000000
##4278CA	1.00	4.40	4.77	4.77
#FFFFFF	4.40	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)

#527FCD

Deuteranopia (green-blind)

#3D72C8

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4278ca;
/* rgb */ color: rgb(66, 120, 202);
/* oklch */ color: oklch(57.6% 0.139 258.6);

Tailwind

colors: {
  custom: {
    50: '#859eda',
    500: '#4278ca',
    950: '#000000',
  },
}

SCSS

$custom: #4278ca;
$custom-light: #859eda;
$custom-dark: #000000;

JSON

{
  "hex": "#4278ca",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 202
  },
  "hsl": {
    "h": 216.176,
    "s": 56.198,
    "l": 52.549
  },
  "oklch": {
    "l": 0.57591,
    "c": 0.13926,
    "h": 258.6
  },
  "luminance": 0.18855
}

Semantic roles & 50–950 ramp

primary

#4278CA

secondary

#D1BA96

accent

#A348DF

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4278CA

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

Preview Lab → · Contrast checker → · Palette generator →