Genre
Palette
Typography
Imagery
Trap to avoid
Cozy Mystery
PaletteWarm, saturated: terracotta, cream, mustard, sage, deep teal. Avoid grim or noir tones.
TypographyHand-style or warm serif series name. Friendly, approachable. Often a recurring icon (cup, cat, pie).
ImageryIllustrated, never photographic. Recurring cosy setting (village, bakery, inn) rendered seasonally per book.
Trap to avoidGoing too dark. Cozy readers self-select on warmth. A grey cover signals psychological thriller and chases them off.
Thriller
PaletteHigh contrast: black or deep navy dominant, single bright accent (crimson, electric blue, acid yellow).
TypographyBold sans-serif or condensed display. ALL CAPS title is common. Author name often as large or larger than title.
ImagerySilhouette, single iconic object, or tightly cropped figure. Often dark and gritty. Negative space carries the tension.
Trap to avoidCrowded composition. Thrillers earn their punch with restraint. One image, one type block, one accent.
Romance
PaletteSoft and emotive: dusty rose, blush, warm cream, sage, slate, plum. Skin tones photograph realistically.
TypographyModern serif or script for the title. Series name often smaller, in a complementary serif or hand-lettering.
ImageryPaired figures or a couple, often touching, often partially cropped. Cartoon illustration is dominant in 2020+ contemporary romance.
Trap to avoidGeneric stock couple shots. Readers spot stock instantly. Either illustration or original photography reads as professional.
Fantasy
PaletteAtmospheric and saturated. Deep blues, blacks, golds, jewel tones. Often a metallic foil treatment on print.
TypographyCustom display lettering or a strong serif. Often involves a flourish, ligature, or decorative cap.
ImageryArtifact + landscape (sword + mountains), character + symbol (heroine + sigil), or a single iconic creature.
Trap to avoidStock fantasy assets. Generic dragons, generic warriors, generic castles. Bespoke art or AI-generated originals only.
LitRPG / GameLit
PaletteVivid, almost digital. Saturated cyan, magenta, gold. Often a HUD-style overlay on the spine or back.
TypographySans-serif display, often with a pixel or tech detail. Numbered books prominently displayed.
ImageryCharacter (often the protagonist) + a class symbol or stat icon. Cover communicates the game-system genre instantly.
Trap to avoidLooking too generic-fantasy. LitRPG readers are looking for visual signals of the system: HUD, stats, class icons.