 col of state.datasets) {
        const el = document.createElement('div');
        el.className = 'dataset-item';
        el.innerHTML = `
          <span style="opacity:0.9;">ðŸŽ¨</span>
          <div class="name">${escapeHtml(headers[col] || `Column ${col+1}`)}</div>
          <input class="color" type="color" value="${state.datasetColors[col] || '#6b76ff'}" data-ds-color="${col}">
        `;
        colorWrap.appendChild(el);
      }
      $('#perDatasetColors').style.display = isSingleValueType() 