From b483687513df9a5963fb738d8142c9610aa6cd00 Mon Sep 17 00:00:00 2001
From: Lennart Regebro <regebro@gmail.com>
Date: Mon, 20 Mar 2023 17:14:28 +0100
Subject: [PATCH] Accept None for label box colors

Closes #88
---
 src/z3c/rml/chart.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/z3c/rml/chart.py b/src/z3c/rml/chart.py
index 3110eee..2182039 100644
--- a/src/z3c/rml/chart.py
+++ b/src/z3c/rml/chart.py
@@ -293,6 +293,7 @@ class ILabelBase(interfaces.IRMLDirectiveSignature):
     boxStrokeColor = attr.Color(
         title='Box Stroke Color',
         description=('The color of the box border line.'),
+        acceptNone=True,
         required=False)
 
     boxStrokeWidth = attr.Measurement(
@@ -303,6 +304,7 @@ class ILabelBase(interfaces.IRMLDirectiveSignature):
     boxFillColor = attr.Color(
         title='Box Fill Color',
         description=('The color in which the box is filled.'),
+        acceptNone=True,
         required=False)
 
     boxTarget = attr.Text(