There are many ways to mix colors and turn clear epoxy resin into wonderful jewel tones and a full palette of other gorgeous colors. The most tried and true methods are with colored inks and dyes, paste colorants, and powdered pigments. The following is a short primer on coloring resin. For more detail and a tutorial, go to: https://www.instructables.com/Resin-Basics-How-to-Mix-Resin-Colors/
1) Always choose colors according to the name on the label, or by a sample of the color. You can’t always tell a color by what it looks like in the container because the dyes are so concentrated.
2) Shake color bottles very well and often. Most dyes are a suspension of color particles, so you need to make sure the dyes are well mixed to ensure consistent color results.
3) Always start with the smallest amount of pigment and add more in tiny increments. It’s much easier and more economical to add dye than to have to lighten a color by adding more resin. When you’re familiar with a particular product, you can add color a little more freely.
After adding pigment, mix well, but gently so as not to incorporate a lot of extra bubbles. When the pigment is fully incorporated, check the color. Use the intensity of the newly mixed color to determine how much more colorant to add. If you get a big change in color, proceed by adding only one drop at a time. If you only get a faint color, you can try a few drops at a time.
Increasing Color Intensity
Continue to add a drop or two at a time and then mix until you reach the depth of the colors you want. This method will give you a lot of control and allow you to achieve different intensities of color without waste.
Mixing More Colors
There are two main techniques for mixing up your own resin colors. You can add multiple dyes straight from bottles and mix into one portion of clear resin. Or you can mix colors separately and then mix those colors together in another clean cup.
Once your color is mixed, you can continue to work with the resin until it begins to set. The amount of working time will vary depending on the kind of resin, the temperature, humidity, etc. You can pour your colored resin into molds or bezels and make diy jewelry, toys, home decor, and much more!