use alcamo\color\ColorFactory;
use OzdemirBurak\Iris\Color\Hsv;

$colorFactory = new ColorFactory();

$shades = $colorFactory->createShadesInHsv(
    new Hsv('0, 100, 90'),
    new Hsv('60, 40, 0'),
    4
);

Now $shades contains an array of four Hsv objects evenly distributed between the first and the second given color (both included), i.e.

[
    new Hsv('0, 100, 90'),
    new Hsv('20, 80, 60'),
    new Hsv('40, 60, 30'),
    new Hsv('60, 40, 0')
]

Provided classes

ColorFactory currently consist of the method createShadesInHsv().
Tango contains constants representing the Tango color palette.

See the doxygen documentation for details.