diff --git a/ui/annotwindow.cpp b/ui/annotwindow.cpp
--- a/ui/annotwindow.cpp
+++ b/ui/annotwindow.cpp
@@ -276,6 +276,8 @@
         pl.setColor( QPalette::Base, m_color );
         textEdit->setPalette( pl );
     }
+    auto bgLuminance = m_color.redF() * 0.2126 + m_color.greenF() * 0.7152 + m_color.blueF() * 0.0722; // Magic formula from "A Standard Default Color Space for the Internet - sRGB"
+    textEdit->setTextColor( ( bgLuminance > 0.65 ) ? Qt::black : Qt::white );
     m_title->setAuthor( m_annot->author() );
     m_title->setDate( m_annot->modificationDate() );
 }