「Sweet 16」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. Large mylar balloon displaying 'Sweet 16' in rainbow gradient text, floating above a birthday venue. Pink and gold balloons clustered around it. Warm party venue lighting with bokeh fairy lights. Rainbow text on balloon is bright, vivid, and celebratory. Birthday party decoration product shot using rainbow text on balloon merchandise.