The phrase "a subtle but consistent" is correct and usable in written English.
It can be used to describe something that is not overtly obvious but is steady or uniform over time.
Example: "The artist's style features a subtle but consistent use of color that enhances the overall mood of the piece."
Alternatives: "a nuanced yet steady" or "a delicate but unwavering".
It is a subtle but consistent way to remind the women in my life that dammit, I think they're gorgeous.
A subtle, but consistent, genome-scale response to hypogravity environments was found, which was opposite to the response in a hypergravity environment.
Though C6 cells were quite sensitive to either nutlin-3 or doxorubicin, a subtle but consistent additional reduction in viability was seen by combining p19Arf gene transfer with pharmacologic therapies.
The oral jaws also showed a subtle but consistent lengthening along this axis such that animals with steeper profiles had shorter jaws, whereas those with more shallow profiles had relatively longer jaws.
Patients were more successful at inhibiting responses on atomoxetine, showed longer deliberation times and more conservative bets in response to improved odds of winning, and exhibited a more subtle but consistent reduction in reflection impulsivity during information sampling.
Reduction in the expression domains of myod and ntl are much more subtle, but consistent with a loss of dorso-anterior mesoderm.
As in the simulated data [shown in (a) and (b)], these genes have subtle but consistent changes over the seven limb positions, again demonstrating that by accommodating dependence, EBSeq-HMM has increased power to identify genes showing relatively weak, but consistent, changes.
Timing explains much of the difference in interpretation -- Romney and Paul have both gained significantly since early December, with less change apparent in the last week -- although the subtle but consistent differences in the findings highlight a big inherent challenge of polling the Iowa caucuses.
Subtle, but consistent, asymmetries were also observed for a variety of traits, including the thickness of the maxilla and premaxilla and curvature of the nasal bone, underscoring the complexity of this phenotype.
He was the one doctor who dampened the unity with subtle but consistent complaining about why the group couldn't do some things and shouldn't do others.
Morphological differences between the two are subtle but consistent, and the cytochrome b sequences of the two species differ by about 10%.
