The most common and most likely answer to this crossword clue is the 1 letter word D
I've seen this crossword clue in The Daily Telegraph
D
More clues leading to the result D
- ACROSS: GET CROSS, around A.
- - EP + ER+ DUE
- IT: PI [the mathematical constant] “punctures” HOT.
- “Yes, yes” say the Russians, “It’s awful – shocking artist!”
- .
- I think this is just a cryptic definition, with the PO in the centre just serving to say how to spell it: with a -PO- rather than a -PPER-.
- Peter Stuyvesant served as the last Dutch director-general of the colony of New Netherland from 1647 until it was ceded provisionally to the English in 1664. The second American clue.
- - hidden &littishly in {assassi}N IN JA{pan}, and becoming something of a chestnut!
- Quite cute. The lucky creature is a BLACK CAT, take out the Land add elsewhere the H
- Fleming who composed and rejected last letter, drinking half of strong coffee
Buddy explains!

The straight part
We know that "colour scheme" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case colour scheme = d.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does D mean?
D adjective- Abbreviation of declare.
- From a higher position to a lower one; downwards.
- At a lower or further place or position along a set path.
- South (as south is at the bottom of typical maps).
- Away from the city (regardless of direction).
- At or towards any place that is visualised as 'down' by virtue of local features or local convention, or arbitrarily, irrespective of direction or elevation change.
- Towards the opponent's side (in ball-sports).
- Into a state of non-operation.
- To a subordinate or less prestigious position or rank.
- In the direction leading away from the principal terminus, away from milepost zero.
- (sentence substitute) Get down.
- (academia) Away from Oxford or Cambridge.
- From a remoter or higher antiquity.
- So as to lessen quantity, level or intensity.
- So as to reduce size, weight or volume.
- From less to greater detail.
- So as to secure or compress something to the floor, ground, or other (usually horizontal) surface.
- (intensifier) Used with verbs to add emphasis to the action of the verb.
- Used with verbs to indicate that the action of the verb was carried to some state of completion, rather than being of indefinite duration.