colourable

adjective5

1. •
   Apparently true; specious; potentially justifiable.

   • they told him their comming was for some extraordinary tooles and shift of apparell; by this colourable excuse, they obtained 6. or 7. more to their confederacie […]. — 1612
2. •
   That can be coloured.

   • These results were discovered whilst investigating uniquely edge colourable graphs. — 1978
3. •
   (no longer used) Deceptive; fake, misleading.

   • Glauce, what needs this colourable word, / To cloke the cause, that hath it selfe bewrayd? — 1590
4. •
   (no longer used) In appearance only; not in reality what it purports to be, hence counterfeit, feigned.
5. •
   (no longer used) Colourful.