If "bold" refers to appearance**:
* Timid
* Shy
* Subdued
* Cautious
* Reserved
If "bold" refers to personality**:
* Hesitant
* Fearful
* Timid
* Unassertive
* Diffident
If "bold" refers to color**:
* Pale
* Light
* Soft
* Subdued
If "bold" refers to design**:
* Plain
* Simple
* Minimal
* Conservative
If "bold" refers to action**:
* Cautious
* Hesitant
* Prudent
* Conservative
* Passive
It's important to consider the specific meaning of "bold" in your context to determine the most accurate opposite.