diff --git a/core/images/new-journal-button.tid b/core/images/new-journal-button.tid
index 86c3c589c..b5be9066f 100755
--- a/core/images/new-journal-button.tid
+++ b/core/images/new-journal-button.tid
@@ -7,7 +7,7 @@ tags: $:/tags/Image
         <g transform="translate(59.816987, 64.316987) rotate(30.000000) translate(-59.816987, -64.316987) translate(20.316987, 12.816987)">
             <g transform="translate(0.000000, 0.000000)">
                 <path d="M9.99631148,0 C4.4755011,0 -2.27373675e-13,4.48070044 -2.27373675e-13,9.99759461 L-2.27373675e-13,91.6128884 C-2.27373675e-13,97.1344074 4.46966773,101.610483 9.99631148,101.610483 L68.9318917,101.610483 C74.4527021,101.610483 78.9282032,97.1297826 78.9282032,91.6128884 L78.9282032,9.99759461 C78.9282032,4.47607557 74.4585355,0 68.9318917,0 L9.99631148,0 Z M20.8885263,26 C24.2022348,26 26.8885263,23.3137085 26.8885263,20 C26.8885263,16.6862915 24.2022348,14 20.8885263,14 C17.5748178,14 14.8885263,16.6862915 14.8885263,20 C14.8885263,23.3137085 17.5748178,26 20.8885263,26 Z M57.3033321,25.6783342 C60.6170406,25.6783342 63.3033321,22.9920427 63.3033321,19.6783342 C63.3033321,16.3646258 60.6170406,13.6783342 57.3033321,13.6783342 C53.9896236,13.6783342 51.3033321,16.3646258 51.3033321,19.6783342 C51.3033321,22.9920427 53.9896236,25.6783342 57.3033321,25.6783342 Z"></path>
-                <text font-family="Helvetica" font-size="47.1724138" font-weight="bold" fill="#FFFFFF">
+                <text class="tc-fill-background" font-family="Helvetica" font-size="47.1724138" font-weight="bold">
                     <tspan x="42" y="77.4847912" text-anchor="middle"><<now "DD">></tspan>
                 </text>
             </g>
diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index 221800ffd..8df02e788 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -2670,3 +2670,10 @@ select {
         background: <<colour select-tag-background>>;
 }
 
+/*
+** Utility classes for SVG icons
+*/
+
+.tc-fill-background {
+	fill: <<colour background>>;
+}
\ No newline at end of file