▲下面两句中的 bright 不宜改成 brightly：
His eyes were bright blue. 他有一双明亮的蓝眼睛。
The cloth had deep borders of bright red. 这块布有一条很宽的鲜红色的边。
形容词 bright 修饰表示 red, green, blue, yellow 等是英语中很常见的用法，它强调颜色的鲜艳。如以下各句均摘自英语词典：
The leaves are bright green. 叶子是鲜绿色的。 （《新牛津英语双解大词典》green词条）
Jack’s face turned bright red. 杰克的脸变得通红。（《牛津高阶英汉双解词典》第六版 bright 词条）
The leaves on the trees are bright green in spring. 春天树上的叶子是翠绿的。（《牛津高阶英汉双解词典》第四版 bright 词条）
更多例句如：
The flowers are bronzy in bud and bright yellow when open. 这些花的花蕾是青铜色，开放后呈明黄色。
Bartlett pears are very popular and turn bright yellow when ripe. 巴特利特梨非常受欢迎，每当成熟时就变成鲜亮的黄色。
I spotted a shooting star which, to my astonishment, was bright green in colour. 我看见一颗流星，使我大为惊奇的是，它居然是鲜亮的绿色。
▲副词形式的 brightly 也可表示颜色的“鲜艳”，但它主要用于修饰过去分词转化来的形容词coloured 或colored。如：
Buddhist priests wear brightly colored robes. 佛教的僧侣穿着颜色鲜亮的长袍。
Brightly colored clothing stands out in a crowd. 颜色鲜艳的衣服在人群中非常醒目。
There were several brightly coloured rugs scattered around.有好几张亮丽的毯子铺在地上。
She wore a necklace of brightly coloured wooden beads. 她戴着一串由色彩鲜艳的木珠串成的项链。
These flowers are brightly coloured in order to attract butterflies. 这些花朵都有着鲜艳的色彩以便能够吸引蝴蝶。
She has used mosses as a foil for the brightly coloured flowers in the bed. 她用苔藓来衬托花坛中颜色鲜亮的花。