diff --git a/Assets/VRM/UniGLTF/Scripts/IO/MaterialExporter.cs b/Assets/VRM/UniGLTF/Scripts/IO/MaterialExporter.cs
index 07f72b544..8824eb7ab 100644
--- a/Assets/VRM/UniGLTF/Scripts/IO/MaterialExporter.cs
+++ b/Assets/VRM/UniGLTF/Scripts/IO/MaterialExporter.cs
@@ -40,7 +40,7 @@ namespace UniGLTF
         {
             if (m.HasProperty("_Color"))
             {
-                material.pbrMetallicRoughness.baseColorFactor = m.color.ToArray();
+                material.pbrMetallicRoughness.baseColorFactor = m.color.linear.ToArray();
             }
 
             if (m.HasProperty("_MainTex"))
diff --git a/Assets/VRM/UniGLTF/Scripts/IO/MaterialImporter.cs b/Assets/VRM/UniGLTF/Scripts/IO/MaterialImporter.cs
index 7ee5008d4..9d87cf084 100644
--- a/Assets/VRM/UniGLTF/Scripts/IO/MaterialImporter.cs
+++ b/Assets/VRM/UniGLTF/Scripts/IO/MaterialImporter.cs
@@ -102,7 +102,7 @@ namespace UniGLTF
                 if (x.pbrMetallicRoughness.baseColorFactor != null && x.pbrMetallicRoughness.baseColorFactor.Length == 4)
                 {
                     var color = x.pbrMetallicRoughness.baseColorFactor;
-                    material.color = new Color(color[0], color[1], color[2], color[3]);
+                    material.color = (new Color(color[0], color[1], color[2], color[3])).gamma;
                 }
 
                 //renderMode
@@ -145,7 +145,7 @@ namespace UniGLTF
                 if (x.pbrMetallicRoughness.baseColorFactor != null && x.pbrMetallicRoughness.baseColorFactor.Length == 4)
                 {
                     var color = x.pbrMetallicRoughness.baseColorFactor;
-                    material.color = new Color(color[0], color[1], color[2], color[3]);
+                    material.color = (new Color(color[0], color[1], color[2], color[3])).gamma;
                 }
 
                 if (x.pbrMetallicRoughness.baseColorTexture != null && x.pbrMetallicRoughness.baseColorTexture.index != -1)