diff --git a/src/rendering.ts b/src/rendering.ts
index 17d8d93..59fcbf1 100644
--- a/src/rendering.ts
+++ b/src/rendering.ts
@@ -578,6 +578,10 @@ export class StatusmapRenderer {
     if (this.panel.color.mode === 'opacity') {
       return this.panel.color.cardColor;
     } else if (this.panel.color.mode === 'spectrum') {
+      if (!bucket.value && this.panel.nullPointMode === 'as zero') {
+        // bucket.value === 0 falls here, but it is fine.
+        return this.colorScale(0);
+      }
       return this.colorScale(bucket.value);
     } else if (this.panel.color.mode === 'discrete') {
       if (this.panel.seriesFilterIndex !== null && this.panel.seriesFilterIndex !== -1) {