Bright

brillant

(emitting much light; visually dazzling — see also luminous, radiant)

brillant

(of a colour: not muted or pale — see also bold, vivid)

brillant

(having a clear, quick intellect — see also intelligent)

clair

(emitting much light; visually dazzling — see also luminous, radiant)

heureux

(in good spirits — see also happy, optimistic)

intelligent

(having a clear, quick intellect — see also intelligent)

luisant

(emitting much light; visually dazzling — see also luminous, radiant)

vivide

(of a colour: not muted or pale — see also bold, vivid)