I’m currently using InfluxDB + Telegraf + Grafana combination to monitor Linux systems and k3s pods. It’s basically same as Prometheus, but InfluxDB uses push model, which makes it easier to develop tools for collecting custom time series data.
For alerts and dashboards, I think Grafana is the simplest and most hassle free solution available at the moment.
I think it’s not PIxel only issue. Some Samsung S series devices also suffer from the same screen green tint issue.