Here are pictures of all the colors in Lionfish and Noxtide. All images are female Wildclaws, with matching primary and secondary colors. The tertiary gene is underbelly, and the color is listed. The underbelly color will be the closest match possible to the accent color on the wings
Maize- Blackberry Underbelly
Cream- Wine Underbelly
Antique- Steel Underbelly
White- White Underbelly
Moon- Black Underbelly
Ice- Ice Underbelly
Orca- Honeydew Underbelly
Platinum- Raspberry Underbelly
Silver- Aqua Underbelly
Dust- Beige Underbelly
Grey- Crimson Underbelly
Smoke- Watermelon Underbelly
Note: Strawberry is close, too.
Gloom- Crimson Underbelly
Lead- Iris Underbelly
Shale- Thistle Underbelly
Flint- Honeydew Undberbelly
Charcoal- Denim Underbelly
Coal- Cream Underbelly
Oilslick- Red Underbelly
Black- Dust Underbelly (?)
Obsidian- Ruby Underbelly
Eldritch- Green Underbelly
Midnight- Caribbean Underbelly
Shadow- Blush Underbelly (?)
Blackberry- Fuchsia Underbelly
Mulberry- Caribbean Underbelly
Plum- Strawberry Underbelly
Wisteria- Mantis Underbelly
Thistle- Robin Underbelly
Fog- Gold Underbelly
Mist- Pink Underbelly
Lavender- Nightshade Underbelly
Heather- Blackberry Underbelly
Purple- Splash Underbelly
Orchid- Cyan Underbelly
Cream- Wine Underbelly
Antique- Steel Underbelly
White- White Underbelly
Moon- Black Underbelly
Ice- Ice Underbelly
Orca- Honeydew Underbelly
Platinum- Raspberry Underbelly
Silver- Aqua Underbelly
Dust- Beige Underbelly
Grey- Crimson Underbelly
Smoke- Watermelon Underbelly
Note: Strawberry is close, too.
Gloom- Crimson Underbelly
Lead- Iris Underbelly
Shale- Thistle Underbelly
Flint- Honeydew Undberbelly
Charcoal- Denim Underbelly
Coal- Cream Underbelly
Oilslick- Red Underbelly
Black- Dust Underbelly (?)
Obsidian- Ruby Underbelly
Eldritch- Green Underbelly
Midnight- Caribbean Underbelly
Shadow- Blush Underbelly (?)
Blackberry- Fuchsia Underbelly
Mulberry- Caribbean Underbelly
Plum- Strawberry Underbelly
Wisteria- Mantis Underbelly
Thistle- Robin Underbelly
Fog- Gold Underbelly
Mist- Pink Underbelly
Lavender- Nightshade Underbelly
Heather- Blackberry Underbelly
Purple- Splash Underbelly
Orchid- Cyan Underbelly