input[type=»text»],

input[type=»email»],

input[type=»url»],

input[type=»password»],

input[type=»search»],

input[type=»tel»],

textarea {

border-color: lightgray;

}

 

ref: https://wordpress.org/support/topic/contact-form-7-box-border-colors/

Roman Bondar  (@romanbon)