#4278C8#4278C8

#4278C8 is a mid, vivid blue. Relative luminance 0.188; OKLCH L 57.5% C 0.137 H 258.2°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#4278C8
RGB	rgb(66, 120, 200)
HSL	hsl(216, 55%, 52%)
HSV	hsv(216, 67%, 78%)
CMYK	cmyk(67%, 40%, 0%, 21.6%)
CIE-LAB	lab(50.40, 8.09, -46.92)
CIE-LCH	lch(50.40, 47.61, 279.78°)
OKLab	oklab(57.47% -0.028 -0.1337)
OKLCH	oklch(57.47% 0.137 258.2)
XYZ	xyz(19.3848, 18.7594, 57.2317)
Luminance	0.1876 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278C8 #C89242

analogous

#42BBC8 #4278C8 #4F42C8

triadic

#4278C8 #C84278 #78C842

tetradic

#4278C8 #C842BB #C89242 #42C84F

square

#4278C8 #C842BB #C89242 #42C84F

split-complementary

#4278C8 #C84F42 #BBC842

monochromatic

#20406F #2E5B9F #4278C8 #719AD6 #A1BCE4

Accessibility & contrast

On white

4.42

#4278C8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#4278C8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278C8

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278C8	#FFFFFF	#000000	##000000
##4278C8	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#547FCB

Deuteranopia (green-blind)

#3F72C6

Tritanopia (blue-blind)

#008A96

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #4278c8;
/* rgb */ color: rgb(66, 120, 200);
/* oklch */ color: oklch(57.5% 0.137 258.2);

Tailwind

colors: {
  custom: {
    50: '#849ed9',
    500: '#4278c8',
    950: '#000000',
  },
}

SCSS

$custom: #4278c8;
$custom-light: #849ed9;
$custom-dark: #000000;

JSON

{
  "hex": "#4278c8",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 200
  },
  "hsl": {
    "h": 215.821,
    "s": 54.918,
    "l": 52.157
  },
  "oklch": {
    "l": 0.57469,
    "c": 0.13657,
    "h": 258.2
  },
  "luminance": 0.18761
}

Semantic roles & 50–950 ramp

primary

#4278C8

secondary

#D0B996

accent

#A24ADE

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4278C8

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

Preview Lab → · Contrast checker → · Palette generator →