from typing import Dict, Any, Optional


def show_gaps_colored(
    need_col: str,
    reached_col: str,
    color_scheme: str = "red-yellow-green",
    title: Optional[str] = None
) -> Dict[str, Any]:
    """Show gaps with color-coded visuals (placeholder spec)."""
    return {
        "type": "gaps_colored",
        "title": title or "Gaps Visualization",
        "encoding": {"need": need_col, "reached": reached_col, "color_scheme": color_scheme},
    }
