Hero Color Picker

Hero Color Picker adds per-post background and font color controls to the editor sidebar for hero styling via CSS on elements with the hero-colored class.

Features:
– Two color controls: Background Color and Font Color
– On-demand color pickers in compact dropdown popovers
– Live preview of both colors together directly in the sidebar
– Applies selected colors to the editor post summary area for a closer backend preview
– Removes the featured image preview outline while a custom background color is active
– Accessibility check for WCAG AAA Normal Text with PASS / FAILED status
– Panel is shown only while editing posts (post), not in template editing contexts
– Adds a core-like posts list view Hero Background to show only posts with a custom hero background color
– Works on elements that have the CSS class hero-colored

Stored as post meta:
– hero_color_picker_hero_color
– hero_color_picker_font_color

Frontend output (only when values are set):

.hero-colored {
    background-color: $background;
    color: $font;
}

Important template setup:
– Open your block theme template (for example Single) in the Site Editor.
– Select the Group block that should receive the hero styles.
– In block settings, add hero-colored to Additional CSS class(es).