No, that's the retconn made last year. Warcraft 3 (15 years ago) established that pure orcs were green originally, and they turned RAGING red once corrupted by fel.
https://www.google.com/search?q=fel...AUICCgB&biw=802&bih=626#imgrc=zq_LCpyrpjo-NM:
Originally, all orcs were brown-skinned, ranging from a bark-like brown to reddish-brown. However, with the exception of the isolated Mag'har, their bodies reacted to their exposure to warlock magic once it was introduced by Gul'dan. All orcs with warlocks in their clan found their skin slowly turning green before they were ever offered the blood of the demon Mannoroth.[50]
The first orcs to drink the blood of a pit lord rapidly completed their transition to green skin.[50] Further drinking the blood, or possibly the blood of any demon, will change their skin again from green to scarlet, transforming them into chaos orcs or fel orcs. Orcs that drink Mannoroth's blood obtained gray marks in their green skin.[citation needed] Through certain rituals this state is reversible, not only restoring the orcs sanity but their previous green tone as well.[52] No green-skinned orc has ever managed to return to a completely uncorrupted state.
With World of Warcraft, orcs of the Blackrock, Black Tooth Grin and (with Cataclysm) Dragonmaw clans have grey-green or grey skin, differentiating them from the rest of the orcish race. The Blackrock orcs' skin has apparently darkened due to years of dwelling within the dwarven cities within Blackrock Mountain.[53]
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The change of skin colour from brown to green appears to be genetic as Thrall, who had little direct exposure to warlock magic until recently, has had green skin from birth, and none of the Frostwolf clan, who have eschewed fel magic the longest (bar the Mag'har) have younger, brown-skinned members. It would also explain why it does not appear to reverse with time, as neither Drek'Thar of the Frostwolves nor Varok Saurfang of Durotar have regained the brown skin of their youth despite decades with little or no contact with warlocks.
Tides of War revealed that Blackrock clan orcs developed grey skin due to years of living underground. When this change occurred, or whether it affected all clan members is not made clear. There is no mention of the Blackrock clan being anything other than green-skinned before World of Warcraft. Orgrim Doomhammer and Blackhand have never been shown as grey-skinned. However, Warlords of Draenor and the Blackhand comic depicts Blackhand, Orgrim and the Blackrock orcs with grey skin. Eitrigg was noted as green-skinned in Of Blood and Honor and has been like-wise depicted in art, but being a Blackrock orc he is shown in World of Warcraft as grey-skinned, as is his son Ariok. This is despite him leaving the clan at the end of the Second War, and never returning to Blackrock Mountain. The Black Tooth Grin, which did not dwell in Hordemar during the Second War[54] and only reunited with the Blackrock following it, have the same skin tones as their brethren.
The Dragonmaw orcs of the Wetlands were originally pale green, but were changed in Cataclysm to grey. It's unknown whether their grey colouration is the result of genetics or (like the Blackrock orcs) years of dwelling in Grim Batol. The Dragonmaw might even deliberately change the colour of their skin with dyes. The earlier choice of pale green skin may have represent differences in skin tone between clans. Grey skin tones are also often used for orcish cultists, and might represent sickliness, similar to the grayish-purple skin of human and gnomish cultists. The Dragonmaw chieftain Zuluhed retains his green skin in Cataclysm, though this may have been an oversight.
The nature of the change in skin colour when corrupted is considerably different from that of other fel-touched races. Felblood elves and eredar change from their original skin tones straight to the extremes (for orcs, red), and dont appear to have a middle-ground.
Other than visually, the earlier Warcraft games do very little on describing the orc color condition. Written material dating much further back than "retconned last year" have described the many properties on this topic.