Goo is the color halfway between yellow and lime. It has other names that are long and cumbersome, but goo is the best name. Goo can be found in the World of Goo or on Inanimate Insanity Invitational.

Goo is also a substance that can be considered the benign, squishy variant of acid.

Hang on a minute!

Someone added food colouring to the Goo in Inanimate Insanity Invitational! He's... blue!  

Colors
 
Red • Orange • Yellow • Green • Blue • Purple • Black • White • Pink • Brown • Gray (Grey)
 
Cyan • Magenta • Indigo • Violet • Rose • Gold • Silver • Bronze
 
Fuchsia • Beige • Amber • Lime • Lemon • Tan • Teal • Olive • Khaki • Sky Blue • Navy
 
Maroon • Crimson • Vermillion • Scarlet • Coral • Salmon • Peach • Cream • Lavender • Lilac • Aqua • Turquoise • Emerald • Ochre • Sienna • Umber
 
Light Gray • Dark Gray • Burgundy • Auburn • Ruby • Sepia • Taupe • Banana • Spring Green • Mint • Jade • Aquamarine • Azure • Sapphire • Amethyst • Plum • Neon • Ivory • Platinum
 
Apricot • Tangerine • Marigold • Wheat • Chartreuse • Moss • Kelly • Celadon • Periwinkle • Cerulean • Cobalt • Ultramarine • Blueberry • Iris • Grape • Thistle • Mauve • Orchid • Strawberry • Cerise • Vanilla • Chocolate • Mahogany • Chestnut • Ebony • Charcoal • Gunmetal • Key
 
Coquelicot • Persimmon • Sunburn • Peru • Goldenrod • Citrine • Vitellary • Dandelion • Pear • Mindaro • Goo • Slime Green • Sage • Asparagus • Harlequin • Erin • Malachite • Pakistan • Verdigris • Viridian • Alice Blue • Electric Blue • Capri • Cornflower • Glaucous • Victoria • Zaffre • Eggplant • Heliotrope • Puce • Mulberry • Amaranth • Snow • Pearl • Xanadu • Feldgrau
Eigengrau • Vantablack