blocks.css

* {
    border: solid lightgray 1px !important;
}

/* blocks use solid border */

section, aside, nav {
    border: solid green 1px !important;
}
div {
    border: solid blue 1px !important;
}
table {
    border: solid red 1px !important;
}
td, th {
    border: solid pink 1px !important;
}
ul, dl, ol {
    border: solid purple 1px !important;
}
li {
    border: solid magenta 1px !important;
}

/* inline use dashed border */
span {
    border: dashed cyan 1px !important;
}
a {
    border: dashed orange 1px !important;
}
button {
     border: dashed cornflowerblue 1px !important;
}
b, strong {
    border: dashed coral 1px !important;
}
i, em {
    border: dashed lavender 1px !important;
}


/* text use dotted border */
h1, h2, h3, h4, h5, h6 {
    border: dotted red 1px !important;
}
p {
    border: dotted blue 1px !important;
}