fixed xy / z_slider mixup in preRender

jqColorPicker.js

@@ -206,9 +206,9 @@
             colorText = _color.toString(_$trigger._colorMode, _options.forceAlpha),
             HUEContrast = colors.HUELuminance > 0.22 ? dark : light,
             alphaContrast = colors.rgbaMixBlack.luminance > 0.22 ? dark : light,
-            h = (1 - colors.hsv.h) * _$xy_slider._height,
+            h = (1 - colors.hsv.h) * _$z_slider._height,
             s = colors.hsv.s * _$xy_slider._width,
-            v = (1 - colors.hsv.v) * _$z_slider._height,
+            v = (1 - colors.hsv.v) * _$xy_slider._height,
             a = colors.alpha * _$alpha._width,
             translate3d = _GPU ? 'translate3d' : '',
             triggerValue = _$trigger[0].value,