Yeah, it's very useful to be able to change the curve color this way. BTW, this also affects the outline color of the bones.
Normally, I like to darken the color to dark gray value, but not completely black. I usually just use the default 'aqua' color and drag the color down to about 30% from the bottom. (ATM, mine is set to #0F504B.) This dark aqua color seems to show up well against most artwork I've worked with in Moho.
BTW, I don't use full black because black can be a common design color, and black curves and bones definitely aren't visible against that. And when I'm working with artwork that's closer to that aqua color, I'll change the Object setting's hue to something that shows up better but keep the general dark value of the color.
That said sometimes I do wish I could thicken the lines a pixel or two. Just getting more control over how the UI items display will be nice. For example, I'd love to be able to arbitrarily set the
display size of a Pin bone independently of the bone's
Scale effect size.
