Data pills are outline too — both signs. ArenaStatCard's delta pill is transparent with a 1px border whether the change is positive or negative. Filled red stays exclusive to ArenaConfirmDialog's final irreversible confirmation, and that exclusivity is exactly what gives it weight: destructive affordances are rare and must not compete for attention. A data pill has no business spending that signal. The rule applies to positive as well, so the pair reads as one family rather than a green button beside a red warning.