diff --git a/spine-csharp/src/Animation.cs b/spine-csharp/src/Animation.cs
index e6d172aad..8fff49ba0 100644
--- a/spine-csharp/src/Animation.cs
+++ b/spine-csharp/src/Animation.cs
@@ -725,6 +725,7 @@ namespace Spine {
 					slot.g += (slotData.g - slot.g) * alpha;
 					slot.b += (slotData.b - slot.b) * alpha;
 					slot.a += (slotData.a - slot.a) * alpha;
+					slot.ClampColor();
 					return;
 				}
 				return;
@@ -758,6 +759,7 @@ namespace Spine {
 				slot.g = g;
 				slot.b = b;
 				slot.a = a;
+				slot.ClampColor();
 			} else {
 				float br, bg, bb, ba;
 				if (blend == MixBlend.Setup) {
@@ -775,6 +777,7 @@ namespace Spine {
 				slot.g = bg + ((g - bg) * alpha);
 				slot.b = bb + ((b - bb) * alpha);
 				slot.a = ba + ((a - ba) * alpha);
+				slot.ClampColor();
 			}
 		}
 	}
@@ -839,18 +842,22 @@ namespace Spine {
 					slot.g = slotData.g;
 					slot.b = slotData.b;
 					slot.a = slotData.a;
+					slot.ClampColor();
 					slot.r2 = slotData.r2;
 					slot.g2 = slotData.g2;
 					slot.b2 = slotData.b2;
+					slot.ClampSecondColor();
 					return;
 				case MixBlend.First:
 					slot.r += (slot.r - slotData.r) * alpha;
 					slot.g += (slot.g - slotData.g) * alpha;
 					slot.b += (slot.b - slotData.b) * alpha;
 					slot.a += (slot.a - slotData.a) * alpha;
+					slot.ClampColor();
 					slot.r2 += (slot.r2 - slotData.r2) * alpha;
 					slot.g2 += (slot.g2 - slotData.g2) * alpha;
 					slot.b2 += (slot.b2 - slotData.b2) * alpha;
+					slot.ClampSecondColor();
 					return;
 				}
 				return;
@@ -893,9 +900,11 @@ namespace Spine {
 				slot.g = g;
 				slot.b = b;
 				slot.a = a;
+				slot.ClampColor();
 				slot.r2 = r2;
 				slot.g2 = g2;
 				slot.b2 = b2;
+				slot.ClampSecondColor();
 			} else {
 				float br, bg, bb, ba, br2, bg2, bb2;
 				if (blend == MixBlend.Setup) {
@@ -919,9 +928,11 @@ namespace Spine {
 				slot.g = bg + ((g - bg) * alpha);
 				slot.b = bb + ((b - bb) * alpha);
 				slot.a = ba + ((a - ba) * alpha);
+				slot.ClampColor();
 				slot.r2 = br2 + ((r2 - br2) * alpha);
 				slot.g2 = bg2 + ((g2 - bg2) * alpha);
 				slot.b2 = bb2 + ((b2 - bb2) * alpha);
+				slot.ClampSecondColor();
 			}
 		}
 
diff --git a/spine-csharp/src/Slot.cs b/spine-csharp/src/Slot.cs
index 1c1c1fb34..c7e45a886 100644
--- a/spine-csharp/src/Slot.cs
+++ b/spine-csharp/src/Slot.cs
@@ -106,6 +106,13 @@ namespace Spine {
 		/// color tinting.</summary>
 		public float A { get { return a; } set { a = value; } }
 
+		public void ClampColor() {
+			r = MathUtils.Clamp(r, 0, 1);
+			g = MathUtils.Clamp(g, 0, 1);
+			b = MathUtils.Clamp(b, 0, 1);
+			a = MathUtils.Clamp(a, 0, 1);
+		}
+
 		/// <summary>The dark color used to tint the slot's attachment for two color tinting, ignored if two color tinting is not used.</summary>
 		/// <seealso cref="HasSecondColor"/>
 		public float R2 { get { return r2; } set { r2 = value; } }
@@ -118,6 +125,12 @@ namespace Spine {
 		/// <summary>Whether R2 G2 B2 are used to tint the slot's attachment for two color tinting. False if two color tinting is not used.</summary>
 		public bool HasSecondColor { get { return data.hasSecondColor; } set { data.hasSecondColor = value; } }
 
+		public void ClampSecondColor () {
+			r2 = MathUtils.Clamp(r2, 0, 1);
+			g2 = MathUtils.Clamp(g2, 0, 1);
+			b2 = MathUtils.Clamp(b2, 0, 1);
+		}
+
 		public Attachment Attachment {
 			/// <summary>The current attachment for the slot, or null if the slot has no attachment.</summary>
 			get { return attachment; }