donaldsoncd reported an issue where unexpected white backgrounds appeared in the composer and interface while using the Horizon theme with a custom cream color palette. The problem was specific to their admin account in light mode, while a test account displayed correctly. Through developer tools, donaldsoncd identified that the CSS variable --d-content-background was resolving to nearly white instead of the defined #FFFDF1. Although disabling the new composer redesign did not fix the issue, manually forcing the variable value did.
chapoi suggested testing in safe mode or with the Foundation theme to isolate the cause, noting that “upcoming changes” (features often enabled only for staff) could be a potential culprit. donaldsoncd confirmed that white areas persisted in safe mode and when switching to Foundation, further pointing away from the Horizon theme itself as the sole cause. After reviewing their settings, donaldsoncd concluded the issue likely stemmed from an “upcoming change” rather than the theme or color palette. denvergeeks corroborated the report, stating they experienced similar glitches with Horizon and had initially assumed the error was local to their setup.
Today, I noticed that some areas of my Discourse forum have suddenly started appearing white instead of my usual cream background. This includes the composer and parts of the main interface.
I initially thought the issue was related to the new composer redesign, but disabling that didn’t resolve it.
I’m not a developer, so I’m unsure whether this is a bug in Horizon, a recent Discourse change, or something specific to my configuration.
With some AI help, I used Chrome’s developer tools to investigate. It looks like the CSS variable --d-content-background is being calculated as nearly white, even though my palette’s background color is #FFFDF1. Temporarily changing that variable to #FFFDF1 fixed the appearance.
Has anyone else encountered this and can you help me resolve?
I tried it in safe mode (without switching anything else) and then my Forum looks like the Foundation theme and I still see some unexpected white areas:
