Board Thread:Support Requests - Getting Started/@comment-3485875-20180911182310

I have a Template:Multiple image (imported from Wikipedia) on my wiki and I would like to change "header_background" so that it always defaults to the "#D78647" hex colour.

In its /doc page, below "header_background": {, I added "default": "#D78647", (just like the default values of other parameters). However this does not affect the template and the colour does not change to that value - I can't see what I'm doing wrong. Anyone know why? 