healthchecks_healthchecks/static/css/admin/records.css

.field-when {
    white-space: nowrap;
}

.field-logger {
    white-space: nowrap;
    color: #444;
}

.field-logger span.N,
.field-logger span.D,
.field-logger span.I,
.field-logger span.W,
.field-logger span.E,
.field-logger span.C {
    display: inline-block;
    width: 18px;
    margin-right: 2px;
    text-align: center;
    font-size: 10px;
    font-weight: bold;
    border-radius: 2px;
}

.field-logger span.N { background: #e0e0e0; }
.field-logger span.D { background: #b0bec5; }
.field-logger span.I { background: #90caf9; }
.field-logger span.W { background: #ffd54f; }
.field-logger span.E { background: #d32f2f; color: #FFF; }
.field-logger span.C { background: #333; color: #FFF; }

.field-message_traceback {
    width: 100%;
}

.field-message_traceback pre {
    padding: 0;
}

.field-traceback .readonly {
    font-family: monospace;
}

.field-message .readonly {
    width: 90%;
    font-family: monospace;

}