1

Always use colors+symbols

When in need of communicating a message (i.e. "alert") use a combination of color and symbol or word, do not rely exclusively on the color.

2

A reduced color palette

A minimal color palette is more effective when using color to communicate information.

3

Use textures and patterns

Data visualization is better communicated through the use of textures or patterns in combination with color, rather than relying exclusively on color.

1

The beauty of monocrome

Instead of using multiple colors, use multiple shades of a color.

2

The clarity of high contrast

A minimal color palette is more effective when using color to communicate information.

3

Use thicker lines

A thicker lines make it everything more legible and the colors easier to identify.