diff --git a/taiga/projects/models.py b/taiga/projects/models.py
index 6f943491..07d71af3 100644
--- a/taiga/projects/models.py
+++ b/taiga/projects/models.py
@@ -162,7 +162,7 @@ class Project(ProjectDefaults, TaggedMixin, models.Model):
     is_private = models.BooleanField(default=False, null=False, blank=True,
                                      verbose_name=_("is private"))
 
-    tags_colors = TextArrayField(dimension=2, null=False, blank=True, verbose_name=_("tags colors"), default={})
+    tags_colors = TextArrayField(dimension=2, null=False, blank=True, verbose_name=_("tags colors"), default=[])
 
     class Meta:
         verbose_name = "project"