Penumbra is a mathematically balanced colour scheme constructed in a perceptually uniform colour space with base colours inspired by the shades of colour occurring in nature due to the light of the sun and the sky. It cleanly separates the perceptual properties of colours while optimally utilizing the available colour space of typical displays.
Handy little tool that can be used to get a flavour of how long you've spent working on a particular project. While it's not going to be 100% accurate, it will give a vague sense of duration.