#4278EA#4278EA

#4278EA is a mid, vivid blue. Relative luminance 0.205; OKLCH L 59.7% C 0.182 H 263.0°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#4278EA
RGB	rgb(66, 120, 234)
HSL	hsl(221, 80%, 59%)
HSV	hsv(221, 72%, 92%)
CMYK	cmyk(71.8%, 48.7%, 0%, 8.2%)
CIE-LAB	lab(52.43, 20.23, -62.89)
CIE-LCH	lch(52.43, 66.06, 287.83°)
OKLab	oklab(59.68% -0.0222 -0.1806)
OKLCH	oklch(59.68% 0.182 263)
XYZ	xyz(23.8092, 20.5291, 80.5337)
Luminance	0.2053 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278EA #EAB442

analogous

#42CCEA #4278EA #6042EA

triadic

#4278EA #EA4278 #78EA42

tetradic

#4278EA #EA42CC #EAB442 #42EA60

square

#4278EA #EA42CC #EAB442 #42EA60

split-complementary

#4278EA #EA6042 #CCEA42

monochromatic

#123FA0 #1855D7 #4278EA #799FF0 #B0C7F6

Accessibility & contrast

On white

4.11

#4278EA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#4278EA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278EA

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278EA	#FFFFFF	#000000	##000000
##4278EA	1.00	4.11	5.11	5.11
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.11	21.00	1.00	1.00
##000000	5.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3685EE

Deuteranopia (green-blind)

#0076E8

Tritanopia (blue-blind)

#0093A6

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #4278ea;
/* rgb */ color: rgb(66, 120, 234);
/* oklch */ color: oklch(59.7% 0.182 263.0);

Tailwind

colors: {
  custom: {
    50: '#8b9ef1',
    500: '#4278ea',
    950: '#000000',
  },
}

SCSS

$custom: #4278ea;
$custom-light: #8b9ef1;
$custom-dark: #000000;

JSON

{
  "hex": "#4278ea",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 234
  },
  "hsl": {
    "h": 220.714,
    "s": 80,
    "l": 58.824
  },
  "oklch": {
    "l": 0.59682,
    "c": 0.18197,
    "h": 263
  },
  "luminance": 0.20532
}

Semantic roles & 50–950 ramp

primary

#4278EA

secondary

#E5D0A3

accent

#B731F6

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0D0E17

muted

#7E7E85

Preview Lab

Preview with #4278EA

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

Preview Lab → · Contrast checker → · Palette generator →