diff --git a/src/sectorBuilder.ts b/src/sectorBuilder.ts
index 72d28a3..344a5a8 100644
--- a/src/sectorBuilder.ts
+++ b/src/sectorBuilder.ts
@@ -66,6 +66,7 @@ export class SectorBuilder {
             this.insetDistance
           )
         : undefined;
+      const baseFillColor = innerFill ? '#ffffff' : fillColor;
 
       const sectorKey = `L${layerIndex}-P${i}`;
       const textPathId = `text-path-${sectorKey}`;
@@ -114,7 +115,7 @@ export class SectorBuilder {
         aMidRad: centroid.aMidRad,
         cx: centroid.cx,
         cy: centroid.cy,
-        fill: fillColor,
+        fill: baseFillColor,
         textColor,
         label: isMultiText ? '' : rawContent,
         path: annularSectorPath(layer.rInner, layer.rOuter, aStart, aEnd),