diff --git a/apps/predbat/web_helper.py b/apps/predbat/web_helper.py
index 7f96b6fa0..b7797a5db 100644
--- a/apps/predbat/web_helper.py
+++ b/apps/predbat/web_helper.py
@@ -7168,6 +7168,7 @@ def get_header_html(title, calculating, default_page, arg_errors, THIS_VERSION,
     """
 
     text = '<!doctype html><html><head><meta charset="utf-8"><title>{}</title>'.format(title)
+    text += '<link rel="icon" type="image/svg+xml" href="https://raw.githubusercontent.com/springfall2008/batpred/refs/heads/main/docs/images/bat_logo.svg">'
     text += '<link rel="icon" type="image/png" href="https://raw.githubusercontent.com/springfall2008/batpred/refs/heads/main/docs/images/bat_logo_light.png">'
 
     text += """
diff --git a/docs/images/bat_logo.svg b/docs/images/bat_logo.svg
new file mode 100644
index 000000000..4699de285
--- /dev/null
+++ b/docs/images/bat_logo.svg
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="370" height="184" viewBox="0 0 370 184" role="img" aria-label="Predbat logo">
+<style>
+  .dark { display: none; }
+  @media (prefers-color-scheme: dark) {
+    .light { display: none; }
+    .dark { display: inline; }
+  }
+</style>
+<g class="light">
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+</g>
+<g class="dark">
+<path d="M0,0C0.113,-5.083 0.113,-5.083 -1,-10C2.788,-9.474 5.172,-8.619 8,-6C9.113,-4.969 10.91,-3.262 11.078,-3.093C11.228,-2.94 11.867,-2.252 13,-1C14.653,0.827 15.889,2.89 17.25,4.938C17.649,5.531 18.048,6.124 18.459,6.735C19.264,7.933 20.068,9.132 20.869,10.333C21.845,11.772 22.864,13.182 23.891,14.586C27.43,19.483 28.779,22.932 29,29L38,11C39.32,11.33 40.64,11.66 42,12L42,20L51,20C51.33,17.03 51.66,14.06 52,11L55,11C55.237,11.51 55.474,12.019 55.719,12.545C56.789,14.843 57.863,17.14 58.938,19.438C59.311,20.24 59.684,21.042 60.068,21.869C60.426,22.633 60.784,23.397 61.152,24.184C61.647,25.244 61.647,25.244 62.152,26.326C62.885,27.989 62.885,27.989 64,29C64.186,27.742 64.371,26.484 64.563,25.188C65.949,18.924 69.408,14.215 73,9C73.534,8.167 74.067,7.335 74.617,6.477C77.388,2.155 80.158,-1.543 84,-5C84.508,-5.465 85.016,-5.931 85.539,-6.41C89.599,-10 89.599,-10 93,-10L93,0C94.142,-0.598 95.284,-1.196 96.461,-1.813C125.331,-16.203 161.891,-17.735 193,-11C193.33,-10.01 193.66,-9.02 194,-8C192.863,-7.792 191.726,-7.585 190.555,-7.371C175.742,-4.492 162.854,-0.184 153,12C152.42,13.049 151.84,14.099 151.242,15.18C148.74,18.327 147.286,18.81 143.364,19.34C142.666,19.414 141.969,19.487 141.25,19.563C134.662,20.499 130.424,21.958 125,26C124.01,26.33 120.613,30.313 120,32C119.526,32.763 119.051,33.526 118.563,34.313C117.224,36.615 116.312,38.683 115.402,41.168C115.138,41.886 114.874,42.604 114.601,43.344C114.403,43.891 114.204,44.437 114,45C113.229,45.015 112.458,45.029 111.664,45.044C108.13,45.119 104.596,45.216 101.063,45.313C99.244,45.346 99.244,45.346 97.389,45.381C85.227,45.743 74.347,48.672 65.313,57.25C57.025,66.203 52.713,76.911 48,88L45,88C44.685,87.299 44.371,86.598 44.047,85.875C42.71,82.911 41.358,79.955 40,77C39.678,76.287 39.355,75.574 39.023,74.84C32.702,61.454 24.047,52.081 10,47C6.253,46.113 2.669,45.816 -1.176,45.684C-2.333,45.642 -3.49,45.6 -4.682,45.557C-5.88,45.517 -7.078,45.478 -8.313,45.438C-9.53,45.394 -10.748,45.351 -12.002,45.307C-15.001,45.201 -18.001,45.099 -21,45C-21.364,44.143 -21.727,43.286 -22.102,42.402C-25.759,34.084 -29.296,26.226 -37.668,21.766C-42.179,20.285 -46.964,20.007 -51.672,19.59C-55.054,18.99 -56.053,18.717 -58,16C-58.578,15.092 -59.155,14.185 -59.75,13.25C-69.718,-1.148 -84.619,-5.01 -101,-8C-100.67,-8.99 -100.34,-9.98 -100,-11C-67.485,-18.039 -29.739,-15.883 0,0Z" fill="#F5F7FA" transform="translate(137,64)"/>
+</g>
+</svg>
