diff --git a/images/reference/facebook.svg b/images/reference/facebook.svg
new file mode 100644
index 00000000..cb6a7326
--- /dev/null
+++ b/images/reference/facebook.svg
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="94.153999mm"
+   height="94.153999mm"
+   viewBox="0 0 94.153999 94.153999"
+   version="1.1"
+   id="svg88"
+   inkscape:version="0.92.1 r15371"
+   sodipodi:docname="facebook.svg">
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+       id="clipPath56">
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+     inkscape:zoom="0.98994949"
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+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1" />
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+     id="metadata85">
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+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
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+             inkscape:connector-curvature="0" />
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diff --git a/images/reference/flickr.png b/images/reference/flickr.png
new file mode 100644
index 00000000..8c38c3e5
Binary files /dev/null and b/images/reference/flickr.png differ
diff --git a/images/reference/hackernews.png b/images/reference/hackernews.png
new file mode 100644
index 00000000..5963ec10
Binary files /dev/null and b/images/reference/hackernews.png differ
diff --git a/images/reference/index.md b/images/reference/index.md
index c477c2f1..c6d30053 100644
--- a/images/reference/index.md
+++ b/images/reference/index.md
@@ -1,5 +1,32 @@
 # Reference Images
 
+A visual guide to check if the Super Tiny Icons match the shape and colour of organisation's official SVG logo. 
+Where possible this links to the organisation's brand guidelines page.
+
 | SVG	| Official Logo | Source	|
 |-----|---------------|----------|
-| <img src="/images/svg/twitter.svg" width="256" />	| <img src="/images/reference/twitter.svg" width="256" />	| https://about.twitter.com/en_us/company/brand-resources.html	|
\ No newline at end of file
+| <img src="/images/svg/twitter.svg" width="256" />	| <img src="/images/reference/twitter.svg" width="256" />	| https://about.twitter.com/en_us/company/brand-resources.html	|
+| <img src="/images/svg/hackernews.svg" width="256" />	| <img src="/images/reference/hackernews.png" width="256" />	| https://www.ycombinator.com/favicon.ico	|
+| <img src="/images/svg/flickr.svg" width="256" />	| <img src="/images/reference/flickr.png" width="256" />	| https://www.flickr.com/images/opensearch-flickr-logo.png	|
+| <img src="/images/svg/facebook.svg" width="256" />	| <img src="/images/reference/facebook.svg" width="256" />	| https://en.facebookbrand.com/	|
+| <img src="/images/svg/tumblr.svg" width="256" />	| <img src="/images/reference/tumblr.svg" width="256" />	| https://www.tumblr.com/logo	|
+| <img src="/images/svg/whatsapp.svg" width="256" />	| <img src="/images/reference/whatsapp.svg" width="256" />	| https://www.whatsappbrand.com/	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+| <img src="/images/svg/.svg" width="256" />	| <img src="/images/reference/" width="256" />	| https	|
+
+
diff --git a/images/reference/tumblr.svg b/images/reference/tumblr.svg
new file mode 100644
index 00000000..6dbf5b78
--- /dev/null
+++ b/images/reference/tumblr.svg
@@ -0,0 +1 @@
+<svg id="logo" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024"><defs><style>.cls-1{fill:#39475d;}.cls-2{fill:#fff;}</style></defs><title>tumblr-logo-whiteonblue</title><rect class="cls-1" x="-1.33" width="1024" height="1024"/><path class="cls-2" d="M702.77,799.58C680.56,823.3,629.09,839.4,583,840.16l-5.06,0c-154.84,0-188.47-113.84-188.47-180.29V475.26h-61a12.79,12.79,0,0,1-12.79-12.79V375.29a21.72,21.72,0,0,1,14.47-20.46c79.49-28,104.42-97.37,108.11-150.1,1-14.09,8.37-20.92,20.6-20.92h90.92a12.79,12.79,0,0,1,12.79,12.79V344.25H669A12.79,12.79,0,0,1,681.8,357V461.77A12.79,12.79,0,0,1,669,474.55H562.08V645.28c0,42.87,28.25,54.7,45.7,54.7,16.74-.4,33.22-5.5,41.48-8.82,6.13-2.46,11.52-4.09,16.34-2.88,4.49,1.12,7.44,4.3,9.43,10.1l28.21,82.4C705.53,787.38,707.5,794.53,702.77,799.58Z"/></svg>
\ No newline at end of file
diff --git a/images/reference/whatsapp.svg b/images/reference/whatsapp.svg
new file mode 100644
index 00000000..10d82178
--- /dev/null
+++ b/images/reference/whatsapp.svg
@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   version="1.1"
+   id="svg2"
+   xml:space="preserve"
+   width="1706.9867"
+   height="1422.48"
+   viewBox="0 0 1706.9867 1422.48"
+   sodipodi:docname="whatsapp.svg"
+   inkscape:version="0.92.1 r15371"><metadata
+     id="metadata8"><rdf:RDF><cc:Work
+         rdf:about=""><dc:format>image/svg+xml</dc:format><dc:type
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+     id="defs6"><clipPath
+       clipPathUnits="userSpaceOnUse"
+       id="clipPath18"><path
+         d="M 0,1066.861 H 1280.244 V 0 H 0 Z"
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+       clipPathUnits="userSpaceOnUse"
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+     bordercolor="#666666"
+     borderopacity="1"
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+     inkscape:pageshadow="2"
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+     showgrid="false"
+     inkscape:zoom="0.16590743"
+     inkscape:cx="853.49335"
+     inkscape:cy="711.23999"
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+     id="g10"
+     inkscape:groupmode="layer"
+     inkscape:label="WhatsApp_Logo_2"
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+       id="g12"><g
+         id="g14"
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+           id="g20"
+           transform="translate(1260.3838)"><path
+             d="m 0,0 h -1240.524 c -10.968,0 -19.86,8.892 -19.86,19.86 v 1027.142 c 0,10.968 8.892,19.859 19.86,19.859 H 0 c 10.968,0 19.86,-8.891 19.86,-19.859 V 19.86 C 19.86,8.892 10.968,0 0,0"
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+       id="g24"><g
+         id="g26"
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\ No newline at end of file