Here is the full list of all 13 Hue achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Watch the credits
Complete the game
Collect all the mysterious fun secret beakers
Unlock Lime Colour
Unlock Yellow Colour
Unlock Blue Colour
Unlock Red Colour
Make 5000 obstacles disappear
Unlock Pink Colour
Unlock Orange Colour
Unlock Purple Colour
Change colour for the first time
Unlock Aqua Colour