Color charts and codes are based on pounds of pigment per 94 lb (43 kg) of cement mate-rial, including Portland cement, silica fume, fly ash and lime. Sand and aggregates are not used in this ratio. The maximum level of pigment to cement is 10% by weight. Using less than 1% pigment can result in a washed-out appearance. Blue pigments should be mixed dry with any cement-based material to ensure even color distribution.
When an exact color match is required, complete a test pour, mixing the exact ingredient and ratios that will be use onsite. When custom blends are made for countertops, ready mixes, overlays, curbing, mortar, grouts and other cement based products, the colors hold true within an acceptable range to most users, especially when the mixture has been adjusted to meet specification needs of the mix and the project application