#4279DD#4279DD

#4279DD is a mid, vivid blue. Relative luminance 0.201; OKLCH L 59.0% C 0.164 H 261.2°. Best body text is #000000 at 5.01:1 contrast (WCAG AA passes).

Color values

HEX	#4279DD
RGB	rgb(66, 121, 221)
HSL	hsl(219, 70%, 56%)
HSV	hsv(219, 70%, 87%)
CMYK	cmyk(70.1%, 45.2%, 0%, 13.3%)
CIE-LAB	lab(51.89, 14.95, -56.45)
CIE-LCH	lch(51.89, 58.40, 284.83°)
OKLab	oklab(59.01% -0.0249 -0.1616)
OKLCH	oklch(59.01% 0.164 261.2)
XYZ	xyz(22.1306, 20.0511, 71.0965)
Luminance	0.2005 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4279DD #DDA642

analogous

#42C7DD #4279DD #5942DD

triadic

#4279DD #DD4279 #79DD42

tetradic

#4279DD #DD42C7 #DDA642 #42DD59

square

#4279DD #DD42C7 #DDA642 #42DD59

split-complementary

#4279DD #DD5942 #C7DD42

monochromatic

#19428C #225ABF #4279DD #769EE6 #AAC3F0

Accessibility & contrast

On white

4.19

#4279DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.01

#4279DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4279DD

5.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4279DD	#FFFFFF	#000000	##000000
##4279DD	1.00	4.19	5.01	5.01
#FFFFFF	4.19	1.00	21.00	21.00
#000000	5.01	21.00	1.00	1.00
##000000	5.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4683E1

Deuteranopia (green-blind)

#2675DB

Tritanopia (blue-blind)

#0090A0

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #4279dd;
/* rgb */ color: rgb(66, 121, 221);
/* oklch */ color: oklch(59.0% 0.164 261.2);

Tailwind

colors: {
  custom: {
    50: '#889fe8',
    500: '#4279dd',
    950: '#000000',
  },
}

SCSS

$custom: #4279dd;
$custom-light: #889fe8;
$custom-dark: #000000;

JSON

{
  "hex": "#4279dd",
  "rgb": {
    "r": 66,
    "g": 121,
    "b": 221
  },
  "hsl": {
    "h": 218.71,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.59013,
    "c": 0.16356,
    "h": 261.2
  },
  "luminance": 0.20053
}

Semantic roles & 50–950 ramp

primary

#4279DD

secondary

#DDC79D

accent

#AE3BEC

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4279DD

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

Preview Lab → · Contrast checker → · Palette generator →