fix: update accent colors in .env.markflow for improved theme consist… #21

Job	Run time
SIMD contract (Cranelift)	17s
type + lowering conformance	24s
backend features (llvm-backend)	1m 13s
fmt + clippy	16s
parse conformance	16s
backend features (default)	24s
runtime smoke	22s
	3m 12s

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