From b5a68facb620ebc90ae62ace26cb598db5df91d0 Mon Sep 17 00:00:00 2001
From: Rafel Bennasar Crespi
 <253519461+rafel-roboflow@users.noreply.github.com>
Date: Tue, 21 Apr 2026 12:15:50 +0200
Subject: [PATCH] changes for treating color as with rgb_color instead of
 string

---
 .../v1/dynamic_blocks/block_assembler.py      | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/inference/core/workflows/execution_engine/v1/dynamic_blocks/block_assembler.py b/inference/core/workflows/execution_engine/v1/dynamic_blocks/block_assembler.py
index 816b7204e1..e6b47d9f60 100644
--- a/inference/core/workflows/execution_engine/v1/dynamic_blocks/block_assembler.py
+++ b/inference/core/workflows/execution_engine/v1/dynamic_blocks/block_assembler.py
@@ -221,6 +221,13 @@ def build_input(
     return input_type, field_metadata
 
 
+# Kinds whose values are serialized as strings on the wire. When one of these kinds
+# is declared on the selector side of a dynamic input, `str` is auto-added to the
+# accepted value types so literals like "BLACK" or "#FF0000" are accepted — mirroring
+# how core blocks like text_display declare `Union[str, Selector(kind=[STRING_KIND])]`.
+_STRING_LITERAL_KINDS = {"rgb_color"}
+
+
 def build_input_field_type(
     block_type: str,
     input_name: str,
@@ -238,6 +245,11 @@ def build_input_field_type(
         input_name=input_name,
         input_definition=input_definition,
     )
+    if (
+        _declares_string_literal_kind(input_definition)
+        and str not in input_type_union_elements
+    ):
+        input_type_union_elements.append(str)
     if not input_type_union_elements:
         raise DynamicBlockError(
             public_message=f"There is no definition of input type found for property: {input_name} of "
@@ -253,6 +265,13 @@ def build_input_field_type(
     return input_type
 
 
+def _declares_string_literal_kind(input_definition: DynamicInputDefinition) -> bool:
+    for kinds in input_definition.selector_data_kind.values():
+        if any(kind in _STRING_LITERAL_KINDS for kind in kinds):
+            return True
+    return False
+
+
 def collect_python_types_for_selectors(
     block_type: str,
     input_name: str,