The flag of Bhutan splits the field on the diagonal — golden-yellow upper triangle over saffron-orange lower triangle — crossed by the white Druk, the thunder dragon, clutching jewels in its claws. Standardised in its modern form by 1969, it is the heraldry of Drukpa Buddhism: marigold for the secular authority of the king, saffron for the spiritual tradition, and the roaring dragon for the storms that give the Land of the Thunder Dragon its name.
This design system renders that vexillology in flat, saturated heraldic fields — no gradients, no pastels — anchored by a bold saffron-orange ground, with white reserved strictly for the dragon emblem.
不丹国旗以对角线一分为二——上方为金黄色三角，下方为藏红橙三角——白色的"竹"（Druk，雷龙）横贯其间，爪中紧握宝珠。这面旗帜在 1969 年定型为现代样式，是竺巴噶举派佛教的纹章学：金黄象征国王的世俗权威，藏红象征精神传统，咆哮的雷龙则呼应着让"雷龙之国"得名的喜马拉雅雷暴。
本设计系统将这套纹章语言转化为扁平、饱和的旗面色块——不用渐变、不用粉彩——以浓烈的藏红橙作底，白色严格保留给雷龙徽记，黑色勾勒龙身轮廓，深红作为庄重的强调色。