#4289DD#4289DD

#4289DD is a light, vivid cyan. Relative luminance 0.243; OKLCH L 62.5% C 0.146 H 254.3°. Best body text is #000000 at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#4289DD
RGB	rgb(66, 137, 221)
HSL	hsl(213, 70%, 56%)
HSV	hsv(213, 70%, 87%)
CMYK	cmyk(70.1%, 38%, 0%, 13.3%)
CIE-LAB	lab(56.35, 5.20, -49.33)
CIE-LCH	lch(56.35, 49.60, 276.02°)
OKLab	oklab(62.47% -0.0395 -0.1405)
OKLCH	oklch(62.47% 0.146 254.3)
XYZ	xyz(24.2388, 24.2674, 71.7992)
Luminance	0.2427 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4289DD #DD9642

analogous

#42D7DD #4289DD #4942DD

triadic

#4289DD #DD4289 #89DD42

tetradic

#4289DD #DD42D7 #DD9642 #42DD49

square

#4289DD #DD42D7 #DD9642 #42DD49

split-complementary

#4289DD #DD4942 #D7DD42

monochromatic

#194E8C #226ABF #4289DD #76A9E6 #AACAF0

Accessibility & contrast

On white

3.59

#4289DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.85

#4289DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4289DD

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4289DD	#FFFFFF	#000000	##000000
##4289DD	1.00	3.59	5.85	5.85
#FFFFFF	3.59	1.00	21.00	21.00
#000000	5.85	21.00	1.00	1.00
##000000	5.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#638FE0

Deuteranopia (green-blind)

#4B81DB

Tritanopia (blue-blind)

#009DA8

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #4289dd;
/* rgb */ color: rgb(66, 137, 221);
/* oklch */ color: oklch(62.5% 0.146 254.3);

Tailwind

colors: {
  custom: {
    50: '#88aae8',
    500: '#4289dd',
    950: '#000000',
  },
}

SCSS

$custom: #4289dd;
$custom-light: #88aae8;
$custom-dark: #000000;

JSON

{
  "hex": "#4289dd",
  "rgb": {
    "r": 66,
    "g": 137,
    "b": 221
  },
  "hsl": {
    "h": 212.516,
    "s": 69.507,
    "l": 56.275
  },
  "oklch": {
    "l": 0.62469,
    "c": 0.14594,
    "h": 254.3
  },
  "luminance": 0.2427
}

Semantic roles & 50–950 ramp

primary

#4289DD

secondary

#DDC09D

accent

#9B3BEC

background

#F9FAFE

surface

#F1F4FC

border

#CBCED5

text

#0D1016

muted

#7E7F84

Preview Lab

Preview with #4289DD

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

Preview Lab → · Contrast checker → · Palette generator →