Do you know the best practices around colour?

Using colour in reports can bring them to life, or else make them confusing and noisy, so make sure youre intentional with them.

Semantic colours

Remember that some colours have a shared understanding of their meaning:

Red means pay attention or danger
Green often means good
Traffic lights can be used for showing 3 levels
Cold, Warm, Hot should have appropriate colours that make sense without having to look at the legend

colours powerbi bad — Figure: Bad example – Non-semantic colours cause confusion

colours powerbi good — Figure: Good example – Obvious colours used for Cold, Warm, and Hot

state colors — Figure: Good example – Using the correct state colours (e.g. In Australia: NSW = light blue, QLD = maroon, VIC = dark blue, etc)

Tufte minimalism

Edward Tufte is often quoted as saying that, on a report where you want to draw the eye to exceptions or out of bounds data, colour should only be used to highlight what you want the user to see.

tufte good — Figure: Good example – The black stands out as everything else looks translucent

Consistent Palette

Make sure you stick with one colour palette, so if you use one pastel colour, make them all pastel. If you have one bold colour, make them all bold

pallete bad — Figure: Bad example – Inconsistent palette feel like the colours clash

pallete good — Figure: Good example – Consistent colour palette

Just to be difficult, it is worth noting that red/green colour blindness is the most common type, which may make standard semantic colours sometimes less desirable. In this case, use blues and oranges for contrast instead.