Lowered the saturation boost of the dynamically generated tap color

Author: TimOliver

TORoundedButton/TORoundedButton.h

@@ -117,7 +117,10 @@ IB_DESIGNABLE @interface TORoundedButton : UIControl
 /// (Defaults to off with 1.0f).
 @property (nonatomic, assign) IBInspectable CGFloat tappedTextAlpha;
 
-/// Taking the default button background color apply a brightness offset for the tapped color 
+/// The color of the button's rounded background shape. Applied to `.solid` and `.glass` styles.
+@property (nonatomic, strong, nullable) UIColor *tintColor;
+
+/// Taking the default button background color apply a brightness offset for the tapped color
 /// (Default is 0.25f. Set 0.0 for off).
 @property (nonatomic, assign) IBInspectable CGFloat tappedTintColorBrightnessOffset;
 

TORoundedButton/TORoundedButton.m

@@ -734,6 +734,14 @@ - (UIColor *)_brightnessAdjustedColorWithColor:(UIColor *)color amount:(CGFloat)
         brightnessAdd =  0.18f * amount;
     }
 
+    // Greys and other near-neutral colours carry a meaningless hue plus a faint
+    // undertone (e.g. systemGray leans slightly blue). Boosting their saturation
+    // amplifies that undertone into a visible tint, so scale the hue/saturation
+    // changes by how saturated the source already is — leaving brightness alone.
+    const CGFloat colorfulness = fminf(s / 0.15f, 1.0f);
+    hueShift *= colorfulness;
+    satBoost *= colorfulness;
+
     // Apply hue shift with wrapping
     CGFloat newH = h + hueShift;
     if (newH < 0.0f) { newH += 1.0f; }