#4278E0#4278E0

#4278E0 is a mid, vivid blue. Relative luminance 0.200; OKLCH L 59.0% C 0.169 H 262.0°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#4278E0
RGB	rgb(66, 120, 224)
HSL	hsl(219, 72%, 57%)
HSV	hsv(219, 71%, 88%)
CMYK	cmyk(70.5%, 46.4%, 0%, 12.2%)
CIE-LAB	lab(51.80, 16.65, -58.29)
CIE-LCH	lch(51.80, 60.62, 285.94°)
OKLab	oklab(59% -0.0236 -0.1671)
OKLCH	oklch(59% 0.169 262)
XYZ	xyz(22.4130, 19.9706, 73.1801)
Luminance	0.1997 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278E0 #E0AA42

analogous

#42C7E0 #4278E0 #5B42E0

triadic

#4278E0 #E04278 #78E042

tetradic

#4278E0 #E042C7 #E0AA42 #42E05B

square

#4278E0 #E042C7 #E0AA42 #42E05B

split-complementary

#4278E0 #E05B42 #C7E042

monochromatic

#184190 #2058C5 #4278E0 #779EE9 #ABC3F1

Accessibility & contrast

On white

4.20

#4278E0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.99

#4278E0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278E0

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278E0	#FFFFFF	#000000	##000000
##4278E0	1.00	4.20	4.99	4.99
#FFFFFF	4.20	1.00	21.00	21.00
#000000	4.99	21.00	1.00	1.00
##000000	4.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4183E4

Deuteranopia (green-blind)

#1C75DE

Tritanopia (blue-blind)

#0090A1

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #4278e0;
/* rgb */ color: rgb(66, 120, 224);
/* oklch */ color: oklch(59.0% 0.169 262.0);

Tailwind

colors: {
  custom: {
    50: '#899eea',
    500: '#4278e0',
    950: '#000000',
  },
}

SCSS

$custom: #4278e0;
$custom-light: #899eea;
$custom-dark: #000000;

JSON

{
  "hex": "#4278e0",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 224
  },
  "hsl": {
    "h": 219.494,
    "s": 71.818,
    "l": 56.863
  },
  "oklch": {
    "l": 0.59002,
    "c": 0.16873,
    "h": 262
  },
  "luminance": 0.19973
}

Semantic roles & 50–950 ramp

primary

#4278E0

secondary

#DFC99F

accent

#B139EF

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4278E0

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

Preview Lab → · Contrast checker → · Palette generator →