Turn the whites into another color

[Yanis263720300xru]

Hey guys, I drew this thing here. You see the brightest white lines. They are on one layer, I copied and pasted it. I need to make them dark red. I tried adjustment layers but nothing seems to affect the whites... Can someone please help me.

[Stephen Marsh]

You can add a solid colour fill layer above, then use the layer blending option sliders to isolate the colour to the lightest tones of the underlying layer, using the alt/opt key to split the slider range for a graduated effect.

https://helpx.adobe.com/au/photoshop/using/layer-opacity-blending.html

[Ivan Zajats · Accepted solution]

The easiest way: Colorize, decrease the Lightness and choose the Hue 🙂

[c.pfaffenbichler]

Could you please post screenshots with the pertinent Panels (Toolbar, Layers, Options Bar, …) visible? 

[r-bin]

quick option (not very high quality)

[dDembicki]

Assuming you haven't figured it out by now, here is one way to do it:

1. Create a new hue/saturation adjustment layer. 
2. Click on the little box with the arrow pointing down so it only affects the layer below it. (which is your white lines).
3. Click on colorize. 
4. Adjust sliders to your heart's content. 

Hope that helped. 

[Ivan Zajats]

@dDembicki, you just repeated my comment, lol 🙂

[dDembicki]

I didn't see your comment (I had it up on my browser for a while and didn't think to refresh), but it's all good. Nice to know someone else would do it the same way. There are so many ways to end up in the same place, visually, with PS.