Index: Riskeer/Common/src/Riskeer.Common.Forms/Helpers/AssemblyGroupColorHelper.cs
===================================================================
diff -u
--- Riskeer/Common/src/Riskeer.Common.Forms/Helpers/AssemblyGroupColorHelper.cs	(revision 0)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Helpers/AssemblyGroupColorHelper.cs	(revision 1228f310314708afee087d4e83260e80d83f18e5)
@@ -0,0 +1,81 @@
+// Copyright (C) Stichting Deltares 2021. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.ComponentModel;
+using System.Drawing;
+using Riskeer.AssemblyTool.Data;
+
+namespace Riskeer.Common.Forms.Helpers
+{
+    /// <summary>
+    /// Helper class for determining the colors belonging to various assembly groups.
+    /// </summary>
+    public class AssemblyGroupColorHelper
+    {
+        /// <summary>
+        /// Gets the color for a failure mechanism section assembly group.
+        /// </summary>
+        /// <param name="assemblyGroup">The assembly group to get the color for.</param>
+        /// <returns>The <see cref="Color"/> corresponding to the given assembly group.</returns>
+        /// <exception cref="InvalidEnumArgumentException">Thrown when <paramref name="assemblyGroup"/>
+        /// has an invalid value for <see cref="FailureMechanismSectionAssemblyGroup"/>.</exception>
+        /// <exception cref="NotSupportedException">Thrown when <paramref name="assemblyGroup"/>
+        /// is not supported.</exception>
+        public static Color GetFailureMechanismSectionAssemblyCategoryGroupColor(FailureMechanismSectionAssemblyGroup assemblyGroup)
+        {
+            if (!Enum.IsDefined(typeof(FailureMechanismSectionAssemblyGroup), assemblyGroup))
+            {
+                throw new InvalidEnumArgumentException(nameof(assemblyGroup),
+                                                       (int) assemblyGroup,
+                                                       typeof(FailureMechanismSectionAssemblyGroup));
+            }
+
+            switch (assemblyGroup)
+            {
+                case FailureMechanismSectionAssemblyGroup.ND:
+                    return Color.FromArgb(192, 192, 192);
+                case FailureMechanismSectionAssemblyGroup.III:
+                    return Color.FromArgb(34, 139, 34);
+                case FailureMechanismSectionAssemblyGroup.II:
+                    return Color.FromArgb(146, 208, 80);
+                case FailureMechanismSectionAssemblyGroup.I:
+                    return Color.FromArgb(198, 224, 180);
+                case FailureMechanismSectionAssemblyGroup.ZeroPlus:
+                    return Color.FromArgb(255, 255, 0);
+                case FailureMechanismSectionAssemblyGroup.Zero:
+                    return Color.FromArgb(255, 165, 0);
+                case FailureMechanismSectionAssemblyGroup.IMin:
+                    return Color.FromArgb(255, 0, 0);
+                case FailureMechanismSectionAssemblyGroup.IIMin:
+                    return Color.FromArgb(178, 34, 34);
+                case FailureMechanismSectionAssemblyGroup.IIIMin:
+                    return Color.FromArgb(128, 0, 0);
+                case FailureMechanismSectionAssemblyGroup.D:
+                    return Color.FromArgb(255, 90, 172);
+                case FailureMechanismSectionAssemblyGroup.Gr:
+                    return Color.FromArgb(255, 255, 255);
+                default:
+                    throw new NotSupportedException();
+            }
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/Common/test/Riskeer.Common.Forms.Test/Helpers/AssemblyGroupColorHelperTest.cs
===================================================================
diff -u
--- Riskeer/Common/test/Riskeer.Common.Forms.Test/Helpers/AssemblyGroupColorHelperTest.cs	(revision 0)
+++ Riskeer/Common/test/Riskeer.Common.Forms.Test/Helpers/AssemblyGroupColorHelperTest.cs	(revision 1228f310314708afee087d4e83260e80d83f18e5)
@@ -0,0 +1,61 @@
+// Copyright (C) Stichting Deltares 2021. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.ComponentModel;
+using System.Drawing;
+using Core.Common.TestUtil;
+using NUnit.Framework;
+using Riskeer.AssemblyTool.Data;
+using Riskeer.Common.Forms.Helpers;
+using Riskeer.Common.Forms.TestUtil;
+
+namespace Riskeer.Common.Forms.Test.Helpers
+{
+    [TestFixture]
+    public class AssemblyGroupColorHelperTest
+    {
+        [Test]
+        public void GetFailureMechanismSectionAssemblyCategoryGroupColor_InvalidFailureMechanismSectionAssemblyGroup_ThrowsInvalidEnumArgumentException()
+        {
+            // Setup
+            const FailureMechanismSectionAssemblyGroup assemblyGroup = (FailureMechanismSectionAssemblyGroup) 99;
+
+            // Call
+            void Call() => AssemblyGroupColorHelper.GetFailureMechanismSectionAssemblyCategoryGroupColor(assemblyGroup);
+
+            // Assert
+            var expectedMessage = $"The value of argument 'assemblyGroup' ({assemblyGroup}) is invalid for Enum type '{nameof(FailureMechanismSectionAssemblyGroup)}'.";
+            TestHelper.AssertThrowsArgumentExceptionAndTestMessage<InvalidEnumArgumentException>(Call, expectedMessage);
+        }
+
+        [Test]
+        [TestCaseSource(typeof(AssemblyGroupColorTestHelper), nameof(AssemblyGroupColorTestHelper.FailureMechanismSectionAssemblyGroupColorCases))]
+        public void GetFailureMechanismSectionAssemblyCategoryGroupColor_ValidFailureMechanismSectionAssemblyGroup_ReturnsExpectedColor(
+            FailureMechanismSectionAssemblyGroup assemblyGroup, Color expectedColor)
+        {
+            // Call
+            Color color = AssemblyGroupColorHelper.GetFailureMechanismSectionAssemblyCategoryGroupColor(assemblyGroup);
+
+            // Assert
+            Assert.AreEqual(expectedColor, color);
+        }
+    }
+}
\ No newline at end of file
Index: Riskeer/Common/test/Riskeer.Common.Forms.TestUtil/AssemblyGroupColorTestHelper.cs
===================================================================
diff -u
--- Riskeer/Common/test/Riskeer.Common.Forms.TestUtil/AssemblyGroupColorTestHelper.cs	(revision 0)
+++ Riskeer/Common/test/Riskeer.Common.Forms.TestUtil/AssemblyGroupColorTestHelper.cs	(revision 1228f310314708afee087d4e83260e80d83f18e5)
@@ -0,0 +1,56 @@
+// Copyright (C) Stichting Deltares 2021. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.Collections.Generic;
+using System.Drawing;
+using NUnit.Framework;
+using Riskeer.AssemblyTool.Data;
+
+namespace Riskeer.Common.Forms.TestUtil
+{
+    /// <summary>
+    /// Class that can be used to assert the color corresponding to assembly groups.
+    /// </summary>
+    public static class AssemblyGroupColorTestHelper
+    {
+        /// <summary>
+        /// Gets a collection of test cases to test the colors belonging to various
+        /// <see cref="FailureMechanismSectionAssemblyGroup"/> values.
+        /// </summary>
+        public static IEnumerable<TestCaseData> FailureMechanismSectionAssemblyGroupColorCases
+        {
+            get
+            {
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.ND, Color.FromArgb(192, 192, 192));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.III, Color.FromArgb(34, 139, 34));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.II, Color.FromArgb(146, 208, 80));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.I, Color.FromArgb(198, 224, 180));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.ZeroPlus, Color.FromArgb(255, 255, 0));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.Zero, Color.FromArgb(255, 165, 0));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.IMin, Color.FromArgb(255, 0, 0));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.IIMin, Color.FromArgb(178, 34, 34));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.IIIMin, Color.FromArgb(128, 0, 0));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.D, Color.FromArgb(255, 90, 172));
+                yield return new TestCaseData(FailureMechanismSectionAssemblyGroup.Gr, Color.FromArgb(255, 255, 255));
+            }
+        }
+    }
+}
\ No newline at end of file