TW is probably right but I’ll offer an alternate explanation. While Purple has been used in sex toys for at least several decades, pink used to be the dominant color for a good chunk of the 20th century. Largely because sex toys like dildos and vibrators were traditionally marketed to women and pink is the color that companies often use as a lazy way to make products “for her.”
Purple has some advantages in color choice. It is gender neutral, in western culture it is generally a masculine and feminine color.
It is dark so it resists stains and discoloration in use so she’s better than many other colors and doesn’t tend to show off putting stains the way a white or lighter color sex toy might.
It is racially ambiguous unlike flesh tones, and many people find false flesh tones off putting and color psychology plays a part with other ambiguous colors or certain colors tending to have certain associations that can put people off.
Purple is often rated as a “sexy” color by people. It has many traditional associations such as royalty and it has more modern associations. Many feminists consider it a color representing female empowerment and many LGBTQ+ consider purple a representational color, so regardless of many individual psychological factors purple is a color most people find appealing and suitable in sex toys.
This feeds into economics where making a product in a single color is generally cheaper than making multiple colors. The cost of 100 identical items to manufacture is usually less than doing 30/30/40 in three different colors. The materials are usually cheaper in bulk and once you have the items the packaging and labeling like bar codes, warehousing and shipping are usually cheaper and easier for a single product than many. You also don’t have to worry about duds. If you have 6 power ranger type actions figures in 6 colors there will usually be one that is most popular and one that doesn’t sell well
the same is true of sex toys. So if you have 4000 green toys and people don’t buy the green, but everyone is buying purple, your retailers or customers will order more purple but avoid the green. The green sits on the shelf dusty and you have to pay more for a small run or second run of purple and eventually likely take a loss on the unsold green ones. Flesh tones can stain and discolor and there are so many shades and preferences that they can be impractical, and wether it is an anatomically correct toy or some crazy looking thing the flesh color can be creepy to many. The “uncanny valley” or it can be threatening, and for many that enjoy penetration but aren’t attracted to men, they don’t want a flesh colored toy that makes them think of a man, making the toy not emulate a human penis can make it seem less threatening or vulgar or can remove the mental adversity to male genitals which extends beyond those who aren’t attracted to males into the more modest or reserved etc.
Lastly, it can just be a cycle. If you make a popular toy in purple and it sells well, when buyers for sex toy distributors look at sales data they will see purple sells. They’ll generally then want to buy purple because it is a popular or at least “safe” color that they feel will sell well. Because buyers order purple, producers will look at data and see purple is what sells to buyers, so they will make purple and the cycle continues.
Purple has some advantages in color choice. It is gender neutral, in western culture it is generally a masculine and feminine color.
It is dark so it resists stains and discoloration in use so she’s better than many other colors and doesn’t tend to show off putting stains the way a white or lighter color sex toy might.
It is racially ambiguous unlike flesh tones, and many people find false flesh tones off putting and color psychology plays a part with other ambiguous colors or certain colors tending to have certain associations that can put people off.
This feeds into economics where making a product in a single color is generally cheaper than making multiple colors. The cost of 100 identical items to manufacture is usually less than doing 30/30/40 in three different colors. The materials are usually cheaper in bulk and once you have the items the packaging and labeling like bar codes, warehousing and shipping are usually cheaper and easier for a single product than many. You also don’t have to worry about duds. If you have 6 power ranger type actions figures in 6 colors there will usually be one that is most popular and one that doesn’t sell well