#4278DA#4278DA

#4278DA is a mid, vivid blue. Relative luminance 0.197; OKLCH L 58.6% C 0.161 H 261.2°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#4278DA
RGB	rgb(66, 120, 218)
HSL	hsl(219, 67%, 56%)
HSV	hsv(219, 70%, 85%)
CMYK	cmyk(69.7%, 45%, 0%, 14.5%)
CIE-LAB	lab(51.44, 14.50, -55.49)
CIE-LCH	lch(51.44, 57.35, 284.64°)
OKLab	oklab(58.61% -0.0245 -0.1588)
OKLCH	oklch(58.61% 0.161 261.2)
XYZ	xyz(21.6136, 19.6509, 68.9700)
Luminance	0.1965 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278DA #DAA442

analogous

#42C4DA #4278DA #5842DA

triadic

#4278DA #DA4278 #78DA42

tetradic

#4278DA #DA42C4 #DAA442 #42DA58

square

#4278DA #DA42C4 #DAA442 #42DA58

split-complementary

#4278DA #DA5842 #C4DA42

monochromatic

#1A4187 #245ABA #4278DA #759DE4 #A8C1EE

Accessibility & contrast

On white

4.26

#4278DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#4278DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278DA

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278DA	#FFFFFF	#000000	##000000
##4278DA	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4782DE

Deuteranopia (green-blind)

#2974D8

Tritanopia (blue-blind)

#008F9E

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #4278da;
/* rgb */ color: rgb(66, 120, 218);
/* oklch */ color: oklch(58.6% 0.161 261.2);

Tailwind

colors: {
  custom: {
    50: '#889ee6',
    500: '#4278da',
    950: '#000000',
  },
}

SCSS

$custom: #4278da;
$custom-light: #889ee6;
$custom-dark: #000000;

JSON

{
  "hex": "#4278da",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 218
  },
  "hsl": {
    "h": 218.684,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.58605,
    "c": 0.16072,
    "h": 261.2
  },
  "luminance": 0.19653
}

Semantic roles & 50–950 ramp

primary

#4278DA

secondary

#DBC59C

accent

#AD3EEA

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4278DA

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

Preview Lab → · Contrast checker → · Palette generator →