Would be nice to have a 'Clear' button inside of NcPopover to be able to reset color, which has been set up before.
Same could be applied for the second click on picked color (unselect)

Source code:
https://github.com/nextcloud/nextcloud-vue/blob/master/src/components/NcColorPicker/NcColorPicker.vue

Important:

Current upstream library (Chrome component) does not support undefined as a color value.

[Vue warn]: Error in render: "TypeError: this.colors is undefined"

found in

---> <Chrome> at src/components/Chrome.vue

Something neutral should be passed:

• empty string
• fallback color
• neutral color (black, white)
• default color (Nc blue or defaultPallete[0]