feat: select custom color for invalid palette idx

README.md

@@ -58,6 +58,8 @@ All configuration is done either at the config file in `XDG_CONFIG_DIR/.config/s
 
 <kbd>1</kbd>, <kbd>2</kbd>, <kbd>3</kbd>, …, <kbd>9</kbd>, <kbd>0</kbd> — select nth color from the color palette
 
+If out of range select custom color <sup>NEXTRELEASE</sup>
+
 #### Tool Selection Shortcuts (configurable) <sup>0.20.0</sup>
 Default single-key shortcuts:
 - <kbd>p</kbd>: Pointer tool

src/main.rs

@@ -257,11 +257,15 @@ impl Component for App {
                     .emit(ToolsToolbarInput::SwitchSelectedTool(tool));
             }
             AppInput::ColorSwitchShortcut(index) => {
+                let palette_len = APP_CONFIG.read().color_palette().palette().len() as u64;
+                let color_button = if index < palette_len {
+                    ui::toolbars::ColorButtons::Palette(index)
+                } else {
+                    ui::toolbars::ColorButtons::Custom
+                };
                 self.style_toolbar
                     .sender()
-                    .emit(StyleToolbarInput::ColorButtonSelected(
-                        ui::toolbars::ColorButtons::Palette(index),
-                    ));
+                    .emit(StyleToolbarInput::ColorButtonSelected(color_button));
             }
             AppInput::ScaleFactorChanged => {
                 self.sketch_board

src/sketch_board.rs

@@ -895,13 +895,9 @@ impl SketchBoard {
                     } else {
                         hotkey_digit - 1
                     };
-                    if APP_CONFIG.read().color_palette().palette().len()
-                        >= (index_digit + 1) as usize
-                    {
-                        sender
-                            .output_sender()
-                            .emit(SketchBoardOutput::ColorSwitchShortcut(index_digit as u64));
-                    }
+                    sender
+                        .output_sender()
+                        .emit(SketchBoardOutput::ColorSwitchShortcut(index_digit as u64));
                 }
             }
             TextEventMsg::Preedit {