diff --git a/data/themes/cusis/main_toolbar_bg.png b/data/themes/cusis/main_toolbar_bg.png
deleted file mode 100644
index ca5c4ca9a..000000000
Binary files a/data/themes/cusis/main_toolbar_bg.png and /dev/null differ
diff --git a/data/themes/cusis/style.css b/data/themes/cusis/style.css
index 110e386d2..849a4d52c 100644
--- a/data/themes/cusis/style.css
+++ b/data/themes/cusis/style.css
@@ -131,11 +131,11 @@ nameLabel, effectLabel, sf2InstrumentView > QLabel {
 
 
 QWidget#mainToolbar {
-	background-image: url(resources:main_toolbar_bg.png);
+	background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop: 0 #4a4a4a, stop: 1.0 #383838);
 }
 
 QToolBar {
-	background: url(resources:toolbar_bg.png);
+	background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop: 0 #4a4a4a, stop: 1.0 #383838);
 }
 
 
diff --git a/data/themes/cusis/toolbar_bg.png b/data/themes/cusis/toolbar_bg.png
deleted file mode 100644
index ada851ff2..000000000
Binary files a/data/themes/cusis/toolbar_bg.png and /dev/null differ
diff --git a/data/themes/default/main_toolbar_bg.png b/data/themes/default/main_toolbar_bg.png
deleted file mode 100644
index d6e662ab3..000000000
Binary files a/data/themes/default/main_toolbar_bg.png and /dev/null differ
diff --git a/data/themes/default/style.css b/data/themes/default/style.css
index de9de28b0..2f56963b1 100644
--- a/data/themes/default/style.css
+++ b/data/themes/default/style.css
@@ -113,11 +113,11 @@ nameLabel, effectLabel, sf2InstrumentView > QLabel, QComboBox {
 
 
 QWidget#mainToolbar {
-	background-image: url(resources:main_toolbar_bg.png);
+	background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop: 0 #66728c, stop: 1.0 #38404e);
 }
 
 QToolBar {
-	background: url(resources:toolbar_bg.png);
+	background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop: 0 #66728c, stop: 1.0 #38404e);
 }
 
 QToolButton, toolButton {
diff --git a/data/themes/default/toolbar_bg.png b/data/themes/default/toolbar_bg.png
deleted file mode 100644
index 78ebb5e0f..000000000
Binary files a/data/themes/default/toolbar_bg.png and /dev/null differ