「Party Time!」は FontVibe AI で作成したレインボーの文字エフェクトです。鮮やかな多色レインボーグラデーションの文字エフェクトです。滑らかな色の移り変わり、プリズムのような光、そして陽気で色彩豊かなタイポグラフィが特徴です。

rendered as rainbow text effect — COLOR (mandatory): each individual letter must contain a complete ROYGBIV rainbow gradient top-to-bottom within itself — top=red, upper=orange, mid=yellow-green, lower=blue-indigo, bottom=violet. NOT one color per letter. NOT a gradient across the whole word. Every letter is its own complete rainbow. Full chroma Pride flag saturation — not pastel, not muted, not shifted to any single hue. Birthday t-shirt mockup: white short-sleeve t-shirt flat lay on pink surface with confetti and small balloons around it. 'Party Time!' rainbow bubble letters printed large on front chest — ROYGBIV gradient on each bubble letter, vivid. Party merchandise or birthday outfit product shot.