1. (adjective) lacking in variety and interest

• colourless

2. (adjective) weak in color; not colorful

• colourless

1. (adjective) lacking in variety and interest

• dull

2. (adjective) weak in color; not colorful

• achromatic
• neutral

1. (adjective) lacking in variety and interest

• neutral
• pale
• pallid

2. (adjective) weak in color; not colorful

• ashen
• blanched
• bloodless
• livid
• white
• blanched
• etiolate
• etiolated
• bleached
• faded
• washed-out
• washy
• drab
• sober
• somber
• sombre
• dulled
• greyed
• lurid
• pale
• pallid
• wan
• pastelike
• pasty
• prefaded
• waxen
• waxlike
• waxy
• white
• whitened

1. (adjective) weak in color; not colorful

• achromaticity
• achromaticity
• achromatism
• achromatism
• colorlessness
• colorlessness
• colourlessness
• colourlessness

1. (adjective) lacking in variety and interest

• colorful
• colorful
• colourful
• colourful

2. (adjective) weak in color; not colorful

• colorful
• colourful