Chart Color Palette for hundreds of items

1. How many colors should a color palette have?
2. How many colors should you use in a chart or graph?
3. What is the maximum number of colors that you should use within a visualization?
4. What is a sequential color scheme?

How many colors should a color palette have?

Commonly, color palettes are made up of six colors. These colors should include one dominant color, four accent colors, and one standard color for your text (which is usually black or grey).

How many colors should you use in a chart or graph?

Stick to a few colors and use contrast to highlight important information. Don't use more than six colors together, though. Too many colors means similar hues will appear, like blue and green, which can be difficult to tell apart.

What is the maximum number of colors that you should use within a visualization?

Try to stick to seven or fewer colors in a single visualization, the maximum number of items that the brain can hold easily at one time.

What is a sequential color scheme?

Sequential color schemes are used to highlight ordered data such as income, temperature, elevation or infection rates. A well designed sequential color scheme ranges from a light color (representing low attribute values) to a dark color (representing high attribute values).