The diagrams still used the old teal/green/blue scheme. Remap all six to the
electric theme: teal #0d9488 → cyan #0c8fce (primary), blue #3b6fb0 → violet
#7c3aed (containers/boundaries), green #2e8b57 → magenta #c026d3 (services).
Neutral slate + navy kept for lines and text; light card unchanged so the
fixed-colour art stays legible in both themes.
jwright
