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)