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<section id="app-icons">
<h1>App Icons<a class="headerlink" href="#app-icons" title="Permalink to this headline"></a></h1>
<p>In addition to having a <a class="reference internal" href="app-naming.html"><span class="doc">great name</span></a>, every app also needs a great icon. This page provides guidance on how to create one.</p>
<p>Typically, creating an app icon requires pre-existing visual design skills. However, GNOME app icons are deliberately simple in style, in order to make icon creation as accessible as possible.</p>
<p>The <a class="reference external" href="https://flathub.org/apps/details/org.gnome.design.AppIconPreview">App Icon Preview</a> tool is recommended for app icon creation. It supports each stage of the process, from generating a template, previewing the icon in relevant contexts, and exporting the final assets.</p>
<p><strong>App icons should be unique to each and every app. Reusing existing icons for app identities is strongly discouraged.</strong></p>
<section id="metaphor">
<h2>Metaphor<a class="headerlink" href="#metaphor" title="Permalink to this headline"></a></h2>
<p>Each app icon should have a simple, recognizable metaphor. Ideally this should have a clear and obvious relationship with the <a class="reference internal" href="app-naming.html"><span class="doc">app name</span></a>. Common types of metaphors include:</p>
<ul class="simple">
<li><p>Physical objects directly related to what the app does (for example, a speaker for a music app).</p></li>
<li><p>Physical objects which are at least somewhat related to the apps domain, or to an older analog version of it (for example, a cassette tape for a podcasting app).</p></li>
<li><p>Symbols related to the domain (for example, the “play” triangle for a video player).</p></li>
<li><p>If the app has a distinctive UI, a simplified, stylized version of it.</p></li>
</ul>
<p>Avoid metaphors that are unrelated to the name or function of the app, such as using characters or mascots. Also avoid using logos which rely on a specific visual style.</p>
</section>
<section id="gnome-app-icon-style">
<h2>GNOME App Icon Style<a class="headerlink" href="#gnome-app-icon-style" title="Permalink to this headline"></a></h2>
<img alt="../_images/app-icons.svg" src="../_images/app-icons.svg"/><p>The GNOME app icon style is simple and geometric. In many cases you can draw an entire icon with only basic shapes.</p>
<section id="size-shape">
<h3>Size &amp; Shape<a class="headerlink" href="#size-shape" title="Permalink to this headline"></a></h3>
<p>App icons are drawn within a 128×128px area, but shouldnt fill this space. When judging how large to draw the icon, follow the guides in the <a class="reference external" href="https://gitlab.gnome.org/Teams/Design/HIG-app-icons/blob/master/template.svg">app icon template</a>, and ensure that your icon has a similar visual weight to other app icons.</p>
<ul class="simple">
<li><p>Avoid extreme aspect ratios for the icon shape, such as very narrow or very wide shapes.</p></li>
<li><p>The bottom of the icon should be aligned against the standard baseline, which is indicated in the template.</p></li>
</ul>
</section>
<section id="perspective">
<h3>Perspective<a class="headerlink" href="#perspective" title="Permalink to this headline"></a></h3>
<p>While the app icon style is simple, it is not “flat”. Depth is introduced by combining the “top” and “front” of the object, so that each icon has an additional profile at the bottom of the object. This “front” profile is shaded darker than the top surface.</p>
<img alt="../_images/app-icon-perspective.svg" src="../_images/app-icon-perspective.svg"/><p>In most cases the profile is subtle, not taller than <cite>2 detail units</cite> (<cite>4 nominal pixels</cite>). But as the example aboves show there can be exceptions.</p>
</section>
<section id="material-lighting">
<h3>Material &amp; Lighting<a class="headerlink" href="#material-lighting" title="Permalink to this headline"></a></h3>
<p>Icons can make use of skeuomorphic materials (for example: wood, metal, or glass) if required. Otherwise, simple colors and textures are recommended. Use the <a class="reference internal" href="../reference/palette.html"><span class="doc">standard color palette</span></a> as a base for colors.</p>
<p>Straight surfaces should have flat colors, with gradients being reserved for curved surfaces.</p>
<img alt="../_images/app-icon-preview.png" src="../_images/app-icon-preview.png"/>
<p>Shadows should be avoided if possible, but can be used if it is necessary to give contrast to different icon elements. When drawing shadows, the light source should point straight down from above. Do not draw shadows outside the main silhouette of the icon, as these are generated programmatically based on the context.</p>
</section>
<section id="detail">
<h3>Detail<a class="headerlink" href="#detail" title="Permalink to this headline"></a></h3>
<p>App icons are defined at 128×128px, but are typically viewed at 64×64px, and can be scaled down to 32×32px. Therefore, avoiding adding too much detail, as this will be lost at small sizes.</p>
<img alt="../_images/app-icon-sizes.svg" src="../_images/app-icon-sizes.svg"/><p>The template includes a 2px grid which should be followed, and will help to avoid adding excess details.</p>
</section>
</section>
<section id="symbolic-app-icons">
<h2>Symbolic App Icons<a class="headerlink" href="#symbolic-app-icons" title="Permalink to this headline"></a></h2>
<img alt="../_images/app-icons-symbolic.svg" src="../_images/app-icons-symbolic.svg"/><p>Each app should have an additional symbolic version of its app icon, which is used to represent the app icon at smaller sizes, as well as being used for the high-contrast accessibility theme. A description of the symbolic icon style can be found in the <a class="reference internal" href="ui-icons.html"><span class="doc">UI icons guidelines</span></a>.</p>
<p>App symbolics can be drawn in the same SVG as the full-size app icon, as indicated in the app icon template. App Icon Preview will export both the full-size and symbolic versions of the icon.</p>
<p>Where possible, the same metaphor as the full size app icon should be used for the symbolic.</p>
</section>
<section id="nightly-variant">
<h2>Nightly Variant<a class="headerlink" href="#nightly-variant" title="Permalink to this headline"></a></h2>
<p>If you provide a nightly or beta build of your application, it is recommended to create a specific version of the app icon for it so it is possible to tell them apart.</p>
<p><a class="reference external" href="https://flathub.org/apps/details/org.gnome.design.AppIconPreview">App Icon Preview</a> is able to generate a nightly variant of the icon automatically. In some cases it may be desirable to adjust the output manually, though in most cases this shouldnt be necessary.</p>
<img alt="../_images/app-icon-nightly.png" src="../_images/app-icon-nightly.png"/>
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<ul>
<li><a class="reference internal" href="#">App Icons</a><ul>
<li><a class="reference internal" href="#metaphor">Metaphor</a></li>
<li><a class="reference internal" href="#gnome-app-icon-style">GNOME App Icon Style</a><ul>
<li><a class="reference internal" href="#size-shape">Size &amp; Shape</a></li>
<li><a class="reference internal" href="#perspective">Perspective</a></li>
<li><a class="reference internal" href="#material-lighting">Material &amp; Lighting</a></li>
<li><a class="reference internal" href="#detail">Detail</a></li>
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<li><a class="reference internal" href="#symbolic-app-icons">Symbolic App Icons</a></li>
<li><a class="reference internal" href="#nightly-variant">Nightly Variant</a></li>
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