Implement judgement line colour

osu.Game.Rulesets.Mania/Skinning/LegacyHitTarget.cs

@@ -10,6 +10,7 @@
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Skinning;
 using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Mania.Skinning
 {
@@ -33,6 +34,9 @@ private void load(ISkinSource skin, IScrollingInfo scrollingInfo)
             bool showJudgementLine = GetManiaSkinConfig<bool>(skin, LegacyManiaSkinConfigurationLookups.ShowJudgementLine)?.Value
                                      ?? true;
 
+            Color4 lineColour = GetManiaSkinConfig<Color4>(skin, LegacyManiaSkinConfigurationLookups.JudgementLineColour)?.Value
+                                ?? Color4.White;
+
             InternalChild = directionContainer = new Container
             {
                 Origin = Anchor.CentreLeft,
@@ -52,6 +56,7 @@ private void load(ISkinSource skin, IScrollingInfo scrollingInfo)
                         Anchor = Anchor.CentreLeft,
                         RelativeSizeAxes = Axes.X,
                         Height = 1,
+                        Colour = lineColour,
                         Alpha = showJudgementLine ? 0.9f : 0
                     }
                 }

osu.Game/Skinning/LegacyManiaSkinConfigurationLookup.cs

@@ -36,6 +36,7 @@ public enum LegacyManiaSkinConfigurationLookups
         HoldNoteBodyImage,
         ExplosionImage,
         ExplosionScale,
-        ColumnLineColour
+        ColumnLineColour,
+        JudgementLineColour,
     }
 }

osu.Game/Skinning/LegacySkin.cs

@@ -207,6 +207,9 @@ private IBindable<TValue> lookupForMania<TValue>(LegacyManiaSkinConfigurationLoo
 
                 case LegacyManiaSkinConfigurationLookups.ColumnLineColour:
                     return SkinUtils.As<TValue>(getCustomColour(existing, "ColourColumnLine"));
+
+                case LegacyManiaSkinConfigurationLookups.JudgementLineColour:
+                    return SkinUtils.As<TValue>(getCustomColour(existing, "ColourJudgementLine"));
             }
 
             return null;