Change theme

src/app/components/shared/room-join/room-join.component.scss

 mat-form-field {
   font-size: x-large;
+  color: var(--on-surface);
 }
 
 form {

src/theme/dark-Theme/darkTheme.const.ts

 export const dark = {
 
-  '--primary' : '#009688',
+  '--primary' : '#00796b',
   '--primary-variant': '#455a64',
 
-  '--secondary': '#FFCC80',
+  '--secondary': '#004d40',
   '--secondary-variant': '#bdbdbd',
 
   '--background': '#424242',
@@ -11,7 +11,7 @@ export const dark = {
   '--dialog': '#78909c',
 
   '--on-primary': '#212121',
-  '--on-secondary': '#212121',
+  '--on-secondary': '#FFFFFF',
   '--on-background': '#FFFFFF',
   '--on-surface': '#FFFFFF',