Customize form block placeholder border color

Hi All, 

I would like to customize the placeholder border color of a form block, and I cannot find the solution for that in the color settings, it seems like I should use a code for that.

The site is https://heartyvegancakes.squarespace.com/shop pw:heartY

Anyone has an idea perhaps? The color should be #C64C27.

Thank you!

Try this Custom CSS:

.sqs-modal-lightbox:focus {
    outline-color: #C64C27 !important;
}

Thank you @Ziggy, I tried, but it does not work:( 

When you click inside the placeholder, the border is still black.

@Ziggy Thank you so much! Sorry for the late reaction I am so grateful for your help 🙂 

48 minutes ago, fufu15 said:

@Ziggy Thank you so much! Sorry for the late reaction I am so grateful for your help 🙂 

Happy to help!