add logo info

docs/meta/accessibility.md

@@ -5,6 +5,8 @@ description: A guide for contributors on creating accessible content.
 
 At Privacy Guides, we strive to make our website as accessible as possible so we can reach everyone with our message.
 
+## Guidelines
+
 Try to follow the [WCAG guidelines](https://www.wcag.com) as closely as possible when contributing to the site.
 
 You can use this [color contrast checker](https://webaim.org/resources/contrastchecker/) to verify colors meet the guidelines.
@@ -18,4 +20,12 @@ Make sure to use html/markdown elements instead of images/emojis when possible,
 
 Don't use
 
-:white_check_mark:
+:white_check_mark:
+
+This will be easier for things like screenreaders to interpret.
+
+## Company Logos
+
+Sometimes a company logo will not show up well in either light mode or dark mode. In these cases, try to find a version of the logo that looks good in both light and dark modes or see if they have different versions of the logo for light and dark mode.
+
+It never hurts to contact the developers and ask if you can't find the proper logos.