As much as I aesthetically like the ZFI layout, the darker colours they use tend to have an unwanted psychological impact on participants. This was one of the common themes observed and commented on by members at Dharma Wheel when we, for an extended period of time, had rather dark colours prevailing. It was actually Nana (Geoff) who brought it to our attention that the colour scheme there was inappropriate, and feedback from others confirmed his intent.
Through corruption of the Dhamma comes corruption of the discipline, and from corruption of the discipline comes corruption of the Dhamma. This is the first future danger as yet unarisen that will arise in the future. You should recognize it and make an effort to prevent it. (AN 5.79)
Neither traceable in the Discourses nor verifiable by the Discipline, one must conclude thus: 'Certainly, this is not the Blessed One's utterance; this has been misunderstood by that bhikkhu — or by that community, or by those elders, or by that elder.' In that way, bhikkhus, you should reject it. (DN 16)