Not to be confused with unusual internals.
This tag is for use when 'inside' surfaces have an unusual color or other property. All the pictured 'inside' surfaces must have the same color/property. This tag should never occur without a color_insides tag (see table) or similar. However, the color_insides (and similar) does not imply this tag, as it may not be unusual. For example, red_insides, pink_insides, black_insides, brown_insides, and grey_insides are not unusual in many species.

Extrapolation

DO NOT extrapolate. This tag only applies if all of the similar inside parts have the same color (or property).

Table of Colors/properties.

Strikethroughs indicate unpopulated tags

Not listed: cyan_insides tags

Re621 helper

// coming soon™