diff --git a/src/js/layer-manager/layer-group.js b/src/js/layer-manager/layer-group.js
index 820cf9c1..e0393350 100644
--- a/src/js/layer-manager/layer-group.js
+++ b/src/js/layer-manager/layer-group.js
@@ -250,10 +250,12 @@ const addGray = (id) => {
                     originalLayerColors[layer.id][`${layer.type}-color`] = value;
                     if (value[0] == "step") {
                         var greyStep = ["step"];
-                        for (let i = 2; i < greyStep.length; i+= 2) {
+                        for (let i = 2; i < value.length; i+= 2) {
                             greyStep.push(value[i - 1]);
                             greyStep.push(convert(value[i]));
                         }
+                        console.log(value);
+                        console.log(greyStep);
                         Globals.map.setPaintProperty(layer.id, `${layer.type}-color`, greyStep)
                     } else {
                         Globals.map.setPaintProperty(layer.id, `${layer.type}-color`, convert(value));
@@ -345,4 +347,4 @@ export default {
     addVisibilityByID,
     addGray,
     addColor
-};
\ No newline at end of file
+};