Can I change theme elements in runtime

Should I do anything else in my code?

Where I can see full properties list and values in order to know how to set each property and value.

Thank you!

You can edit any of the theme, or simply add a mixin.theme file under the /Themes directory. Use this as an example. Name it Application.mixin.theme. It must be in /Themes.

{
 "name": "Application",

"colors": {
 "focusFrame": "red"
 },

"appearances": {
 "textbox": {
 "inherit": "textbox",
 "states": {
 "focused": {
 "styles": {
 "width": 3
 }
 }
 }
 },
 "button": {
 "inherit": "button",
 "states": {
 "focused": {
 "styles": {
 "width": 3
 }
 }
 }
 },
 "table-scroller/focus-indicator": {
 "states": {
 "default": {
 "styles": {
 "width": 3,
 "color": "focusFrame"
 }
 }
 }
 }
 }
}