[core][node] Serialize formatted expression's text-color option

This enables proper round-tripping for serialized format expression.

1 files changed, 5 insertions, 0 deletions

diff --git a/platform/node/src/node_expression.cpp b/platform/node/src/node_expression.cpp
index 041f60d029..e1c3ba0c39 100644
--- a/platform/node/src/node_expression.cpp
+++ b/platform/node/src/node_expression.cpp
@@ -192,6 +192,11 @@ struct ToValue {
             } else {
                 serializedSection.emplace("fontStack", mbgl::NullValue());
             }
+            if (section.textColor) {
+                serializedSection.emplace("textColor", section.textColor->toObject());
+            } else {
+                serializedSection.emplace("textColor", mbgl::NullValue());
+            }
             sections.emplace_back(serializedSection);
         }
         serialized.emplace("sections", sections);