Are there any built-in color swatches or color palette? Are there any add-ons (or any other way) to get color swatches? In Coreldraw, Illustrator or any vector software we have color swatches.




Ready made color shades, no need of mixing. 
We can have a fixed value for a specified color (red, green, blue, etc.).  
We can directly apply a fixed color value on a mesh. 


How can I have a color swatch or is there any add-on available to use it?
I don't think there is any inbuilt add-on. But you can use this free add-on. http://www.blenderskool.cf/kaleidoscope/