Capture any site in light or dark theme

Webshot now sets the color scheme the target page renders in. Pick Auto, Light or Dark in the capture form, or send a theme parameter to the API.

Chrome reports prefers-color-scheme: light by default. A site that follows the visitor's system setting could only be captured in its light form, whatever it looks like to the people using it. overwatch.earth, issued.live and whack.sh all work that way.

Using it from the form

A Theme control sits next to Format. Auto is the default and sends no override, so captures you make today match the ones you made last week.

Using it from the API

Add theme to the request body:

curl -X POST https://webshot.site/api/capture \
  -H "Authorization: Bearer YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://overwatch.earth","mode":"desktop_viewport","theme":"dark"}' \
  --output shot.jpg

Accepted values are system, light and dark. Anything else returns HTTP 400 with the accepted list, so a typo fails loudly rather than returning the wrong theme.

When the override is applied

The scheme is set before the page loads. A theme script that reads the preference once during startup, which is how a site avoids a flash of the wrong colors, sees the requested scheme on its first paint.

Credit cost is unchanged.