CMYK is a color mode used for professional printing purposes.
Be sure to use this format.
This is necessary to prevent color inaccuracies.

Most home application softwares use the RGB (Red-Green-Blue) color mode.
If you use that mode, you will see many colors more saturated, which will not be achievable in the final printing process.

We suggest you should use professional graphic programs to create your artwork.

We recommend:
- Adobe Photoshop
- Adobe Illustrator