“Happy Birthday Theo”是使用 FontVibe AI 创作的Duotone 双色调文字效果。粗壮窄长的板衬线大写字母，一种亮色带半调网点纹理，另一种颜色做实心错位阴影，置于对比色平涂底上。

striking duotone typography using vermillion red and midnight navy as the two-color palette. Letters are chunky bold slab-serif with heavy ink-filled strokes. Red dominates the letter face, navy fills the drop shadow and bevel inset. Halftone screen dot pattern visible in the red areas — dot grid at slight angle like authentic offset printing. Ink buildup creates a tactile ridged texture at stroke edges. Slight color bleed where red meets navy. Printed on heavy cream cotton stock with visible paper tooth and fiber texture. Faint registration crosshair marks in corners. A bold navy horizontal bar behind 'Birthday' creates depth layering — acting as a ground stripe that anchors the composition. Halftone dot grid at a 15-degree angle floods the vermillion letter faces, dot size graduating slightly from headline to name. Ink buildup ridges trace every stroke edge where red meets navy shadow, a tactile overprint bleed bleeding 1–2 pts outward. 'Happy' reads lighter in visual weight, 'Birthday' dominates as the hero word with maximum ink density, and 'Theo' drops to a warmer, slightly looser spacing — typographic hierarchy built through size contrast and color fill rather than position. Vintage two-color screen-print exhibition poster energy, confident flat graphic composition on a deep navy ground with a narrow vermillion border rule framing the full field.