If you specify a colour in a template node CSS, a really nice feature of the editor is a swatch of the chosen colour and a popup colour picker, which (mostly) respects the colour format you used - hex, rgb, hsla etc.
Of course you only get to see 5 lines in that editor window. If you switch to the full page text editor, the colour swatches and popup are not displayed.
I appreciate that this is an entirely different editor. Is it not possible to get it to be equally helpful?
Could the window with just 5 lines be permitted to be dragged larger to show more of the code?
I see there is an icon next to "Template" which I thought might be related, but clicking it does nothing (for me)