Finding that the text is white in the Divi email opt-in? Add this custom and edit with the colors you wish to use.

.et_pb_newsletter_form .et_pb_signup_custom_field_0 .input[type="checkbox"] + label {
font-family: 'Verdana',Helvetica,Arial,Lucida,sans-serif;
font-size: 10px;
color: #ffffff !important;
text-align: left;
text-shadow: 0em 0.1em 0.1em #ffffff;
}