THREAD COLOR CHARTS
When you download an embroidery design you usually find the file that goes into your embroidery machine and another file that is either a simple word processor file that ends in ".txt", or an Adobe portable document file that ends in ".pdf" that contains the correct thread colors for the design.
The colors are 'suggested" colors that the person who created the design selected for the pattern. There are no "thread police" that will arrest you for using a different color than the one called for in the color chart, so feel free to deviate from the suggested colors however you want for artistic purposes.
Some people delete the color chart files after they download the designs and use the colors that are called for by their embroidery machines display panel. While you are welcome to do that, you will probably find that your designs look better if you keep and use the color charts provided by us. The reason is that our digitizers use a palette of 300 or 400 colors normally. They can choose colors that are close but different for shading and highlighting. Using the exact colors will produce subtle highlights and shadows in your stitching.
On the other hand, if you use the colors displayed by your machine, the stitch out may not look the same as intended by the creator. This is because most machines only have a palette of 63 colors available. Because it lacks the wide range of color choices found in the thread color chart, your embroidery machine will combine two similar colors into one color that is as close as it can get to the intended color. This makes for a less vibrant design sew out. To explain this a little differently, imagine that you have a box of 400 different crayons covering every shade of the color spectrum. You would have a lot more choices when drawing with your crayons than another person who only had 50 different colors. That's a pretty good approximation of why we suggest that you keep and use our color charts.