The boss has always said that Eclipse E4 's theme is too bloated to feel bad. In addition, color themes such as code coloring for Eclipse's editor need to be customized, such as in the form of UE or VS, sourceinsight.
Found two good plugins, one for modifying Eclipse's theme (see Https://github.com/jeeeyul/eclipse-themes) and the other for modifying eclipse's code coloring related configuration (see HTTP// eclipsecolorthemes.org/).
The first plug-in is mainly through the eclipse E4 Cssengine to dynamically modify the Eclipse theme, the default provides a few themes can be toggled, the second plug-in features more powerful, strong expansion, you only need to write an XML file import can implement your own code coloring, Although this principle is simple (by modifying Preferencestore), it is very well-expanded. Worth recommending.
In addition, for the Eclipse E4 topic bloated problem, actually switch to 3.x does not have this problem. If you think 3.x is not good, you can specify a CSS that you write by org.eclipse.core.runtime.product extension points and org.eclipse.e4.ui.css.swt.theme extension points, so your RCP theme can be customized.
This article from "Winger" blog, declined reprint!