Evidence: axe-core scan of psy101-announcement.html
axe-core 4.11.4. Accessibility Insights FastPass runs the same engine.
Rules failed: 6.

SERIOUS  color-contrast  (3 element(s))
         Elements must meet minimum color contrast ratio thresholds
         WCAG tags: wcag2aa, wcag143
         at: .soft:nth-child(6)
         at: .btn
         at: .tiny
MODERATE heading-order  (1 element(s))
         Heading levels should only increase by one
         at: h4:nth-child(5)
SERIOUS  html-has-lang  (1 element(s))
         <html> element must have a lang attribute
         WCAG tags: wcag311
         at: html
CRITICAL image-alt  (1 element(s))
         Images must have alternative text
         WCAG tags: wcag111
         at: img
MODERATE landmark-one-main  (1 element(s))
         Document should have one main landmark
         at: html
MODERATE region  (12 element(s))
         All page content should be contained by landmarks
         at: .header
         at: h1
         at: img

What this scan cannot see: whether the links make sense, whether the
"Submit reflection" box works with a keyboard, or whether "items in red"
means anything to someone who cannot see red. Tab through it, and listen.