Having worked with many great designers, I see that they try to create variety in chart appearance rather than uniformity. So what if there was a way to have make a chart layout with the colors in a different order? This could give you layout color variations while sticking to the branding guidelines. Well, I have a solution for you, but you're gonna have to hack some XML!
If you're an XML newby, please read my article XML Hacking: An Introduction. macOS users will live longer lives if they take a look at XML Hacking: Editing in macOS.
Normally, every layout under a slide master has only 1 color theme. You're mostly stuck with those 10 colors in a fixed order. In my earlier article about Great Color Themes, I explained how the sequence of colors determines the color order of charts.
But during some recent research, I started reading about the <p:clrMapOvr> XML element. This can be applied to a slide layout to rearrange the color theme. With Accents 1 to 6 in a different order, charts can acquire a whole new look. Here's how it works.
Layout Color Variations with clrMapOvr
At the end of most layouts, you may have seen this XML:
This tells the layout that it should use the standard color mapping as defined in the theme. We would think of this as the default or normal set of colors. But what if we want to alter this sequence? We can assign each color theme value to a different task. If you import a PowerPoint 2003 or older deck, this gets generated automatically to keep the deck looking as expected.
Here's an alternate mapping of the same colors:
<a:overrideClrMapping bg1="lt1" tx1="dk1" bg2="lt2" tx2="dk2" accent1="accent6" accent2="accent5" accent3="accent4" accent4="accent3" accent5="accent2" accent6="accent1" hlink="hlink" folHlink="folHlink"/>
This reverses the order of accent colors from the master, giving charts, fills and shapes a whole new look for the slides based on this layout.
We used to tell clients "Sorry, we have to set the color order to match only one of your designed charts." Now we have a different message: "Different chart color sequences? No problem. Just use a different layout!"
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