diff --git a/src/components/SceneModelList.tsx b/src/components/SceneModelList.tsx
index 0575237..fb14696 100644
--- a/src/components/SceneModelList.tsx
+++ b/src/components/SceneModelList.tsx
@@ -1,8 +1,16 @@
-import { Eye, EyeOff, Lock, Unlock, Copy, Trash2, Box, Layers } from 'lucide-react';
+import { Eye, EyeOff, Lock, Unlock, Copy, Trash2, Box, Layers, Check } from 'lucide-react';
 import { Button } from '@/components/ui/button';
+import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover';
 import { useModelStore } from '@/stores/useModelStore';
 import { toast } from 'sonner';
 
+const COLOR_PALETTE = [
+  '#ef4444', '#f97316', '#f59e0b', '#eab308', '#84cc16', '#22c55e',
+  '#10b981', '#14b8a6', '#06b6d4', '#0ea5e9', '#3b82f6', '#6366f1',
+  '#8b5cf6', '#a855f7', '#d946ef', '#ec4899', '#f43f5e', '#64748b',
+  '#ffffff', '#1f2937',
+];
+
 interface SceneModelListProps {
   compact?: boolean;
 }
@@ -15,6 +23,7 @@ export function SceneModelList({ compact = false }: SceneModelListProps) {
   const toggleVisible = useModelStore((s) => s.toggleModelVisible);
   const toggleLocked = useModelStore((s) => s.toggleModelLocked);
   const duplicate = useModelStore((s) => s.duplicateModel);
+  const setModelColor = useModelStore((s) => s.setModelColor);
   const max = useModelStore((s) => s.maxModels);
 
   if (models.length === 0) {
@@ -56,11 +65,47 @@ export function SceneModelList({ compact = false }: SceneModelListProps) {
               }`}
               onClick={() => setActive(m.id)}
             >
-              <div
-                className="h-2.5 w-2.5 shrink-0 rounded-full ring-1 ring-foreground/20"
-                style={{ backgroundColor: m.color }}
-                title="Cor da peça"
-              />
+              <Popover>
+                <PopoverTrigger asChild>
+                  <button
+                    type="button"
+                    className="h-2.5 w-2.5 shrink-0 rounded-full ring-1 ring-foreground/20 hover:ring-2 hover:ring-primary cursor-pointer"
+                    style={{ backgroundColor: m.color }}
+                    title="Trocar cor da peça"
+                    onClick={(e) => e.stopPropagation()}
+                  />
+                </PopoverTrigger>
+                <PopoverContent
+                  className="w-auto p-2"
+                  side="right"
+                  align="start"
+                  onClick={(e) => e.stopPropagation()}
+                >
+                  <p className="font-mono text-[10px] uppercase tracking-widest text-muted-foreground mb-2">
+                    Cor da peça
+                  </p>
+                  <div className="grid grid-cols-5 gap-1.5">
+                    {COLOR_PALETTE.map((c) => {
+                      const selected = c.toLowerCase() === m.color.toLowerCase();
+                      return (
+                        <button
+                          key={c}
+                          type="button"
+                          className="h-6 w-6 rounded-md ring-1 ring-foreground/20 hover:scale-110 transition-transform flex items-center justify-center"
+                          style={{ backgroundColor: c }}
+                          onClick={(e) => {
+                            e.stopPropagation();
+                            setModelColor(m.id, c);
+                          }}
+                          title={c}
+                        >
+                          {selected && <Check className="h-3 w-3" style={{ color: c === '#ffffff' ? '#000' : '#fff' }} />}
+                        </button>
+                      );
+                    })}
+                  </div>
+                </PopoverContent>
+              </Popover>
               <Box className={`h-3 w-3 shrink-0 ${isActive ? 'text-primary' : 'text-muted-foreground'}`} />
               <span className={`flex-1 truncate font-mono ${textSize} ${isActive ? 'text-foreground font-semibold' : 'text-muted-foreground'}`}>
                 {m.fileName}
diff --git a/src/pages/Viewer.tsx b/src/pages/Viewer.tsx
index d1282ba..3c3f616 100644
--- a/src/pages/Viewer.tsx
+++ b/src/pages/Viewer.tsx
@@ -21,7 +21,7 @@ import { convertIFCtoGLB } from "@/lib/convertIFC";
 
 const Viewer = () => {
   const navigate = useNavigate();
-  const { model, xrSupported, addModel, models, maxModels } = useModelStore();
+  const { model, xrSupported, addModel, models, maxModels, scaleRatio } = useModelStore();
   const fileInputRef = useRef<HTMLInputElement>(null);
   const [converting, setConverting] = useState(false);
 
@@ -177,7 +177,7 @@ const Viewer = () => {
                 <div className="space-y-3">
                   <InfoItem icon={FileText} label="Arquivo" value={model.fileName} />
                   <InfoItem icon={Box} label="Tamanho" value={`${(model.fileSize / (1024 * 1024)).toFixed(2)} MB`} />
-                  <InfoItem icon={Ruler} label="Escala" value="1:1 (mm)" />
+                  <InfoItem icon={Ruler} label="Escala" value={`${scaleRatio.label} (mm)`} />
                 </div>
               </div>
 
diff --git a/src/stores/useModelStore.ts b/src/stores/useModelStore.ts
index c9ce865..328ba54 100644
--- a/src/stores/useModelStore.ts
+++ b/src/stores/useModelStore.ts
@@ -100,6 +100,7 @@ interface ModelStore {
   setActiveModel: (id: string | null) => void;
   toggleModelVisible: (id: string) => void;
   toggleModelLocked: (id: string) => void;
+  setModelColor: (id: string, color: string) => void;
   duplicateModel: (id: string) => void;
   clearAllModels: () => void;
   maxModels: number;
@@ -243,6 +244,10 @@ export const useModelStore = create<ModelStore>((set, get) => ({
     models: state.models.map(m => m.id === id ? { ...m, locked: !m.locked } : m),
   })),
 
+  setModelColor: (id, color) => set((state) => ({
+    models: state.models.map(m => m.id === id ? { ...m, color } : m),
+  })),
+
   duplicateModel: (id) => {
     const state = get();
     if (state.models.length >= MAX_MODELS) return;