diff --git a/src/lib/components/molecules/canvas-map/lib/layers/TextLayer.js b/src/lib/components/molecules/canvas-map/lib/layers/TextLayer.js
index 37fe4f7b..620d49cf 100644
--- a/src/lib/components/molecules/canvas-map/lib/layers/TextLayer.js
+++ b/src/lib/components/molecules/canvas-map/lib/layers/TextLayer.js
@@ -94,7 +94,7 @@ export class TextLayer {
    * @constructor
    * @param {Object} params
    * @param {VectorSource} params.source
-   * @param {Style | (() => Style)} [params.style=undefined]
+   * @param {Style | ((feature: import('../Feature').Feature, zoom: number, isHovering: boolean) => Style)} [params.style=undefined]
    * @param {number} [params.minZoom=0]
    * @param {number} [params.opacity=1]
    * @param {boolean} [params.declutter=true]
diff --git a/src/lib/components/molecules/canvas-map/lib/util/toRgba.js b/src/lib/components/molecules/canvas-map/lib/util/toRgba.js
index 12f58c1c..f27ca8a8 100644
--- a/src/lib/components/molecules/canvas-map/lib/util/toRgba.js
+++ b/src/lib/components/molecules/canvas-map/lib/util/toRgba.js
@@ -33,5 +33,5 @@ export function toRgba(color, opacity = 1) {
     return `rgba(${r}, ${g}, ${b}, ${a})`
   }
 
-  throw new Error("Unsupported color format")
+  throw new Error(`Unsupported color format: ${color}`)
 }