So many variables affect concrete and cement color. Especially with grey cement, variables include: source of the grey cement, water content, mixer type, dispersion point of addition, dispersion rate and mix time, curing, batch temperature, admixtures used, finishing techniques, sand and aggregate colors, accuracy of pigment measuring and more. Even white cements are not all created equal as some cement producers source from all over the world and these sources can each vary in color.
The human eye can detect over 10 million colors. Making colored concrete to an EXACT shade is not an easy task and even after 34 years in the pigment business, to guarantee a specific shade is not realistic.
We use the NCS Colour System as our color reference tool. Color fans containing 1950 colors can be purchased by calling Murray Clarke directly at 770-951-8686 or emailing firstname.lastname@example.org. These are used as a communication tool to target colors. We will offer guidance on how to best achieve the targeted color. If a single pigment will get you close to the desired concrete or cement color, this will usually be the recommendation. Keep in mind that it is difficult to view colors accurately on a computer monitor.
You may also use the NCS Colour System to experiment with colors online. Click here and follow the instructions below. Please note: You do not need to login as an NCS subscriber to access the NCS Colour System.
Once on the NCS site, you will see a small color wheel on the right side, on top of a larger color triangle.
Four words are above the color wheel: Triangle - Blackness - Whiteness - Chromaticness. Click each or any of these four words to show a wide variety of color perspectives. A small zoom tab can be clicked to view larger versions of each color selected.
Click the Triangle tab and you will see a color wheel with two arrows below it. Click the arrows forward or backward to move the view around the entire color wheel. Many color coordinates can be observed to target concrete colors.
Click the Blackness tab and you will see a small black triangle with two arrows below it. Click the arrows between 10 and 40 to move into darker versions of each color.
Click the Whiteness tab and you will see a small black triangle with two arrows below it. Click the arrows between 20 and 80 to give a White Cement color perspective.
Click the Chromaticness tab and you will see a small black triangle with two arrows below it. Click the arrows dow to 30 - 20 - 10. At these three levels all Earth Tones can be viewed, as well as a wider range of attractive Blue and Green based colors.
Clarke Colors offers 28 primary pigments that can produce a vast range of concrete and cement shades.