#87C5AE · #B4AFE1
Four independent scores (read the one that fits your goal): Readability 1/100 (fail) · Harmony 48/100 (triadic (soft)) · Distinguishable 38/100 (hard to tell apart) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
HellionGreen and Heather are very different (ΔE 47). They have distinctly different hues (88° apart) and their lightness is similar, so they read as two same-weight colours.
HellionGreen text on Heather: 1.05:1 (Fail); Heather text on HellionGreen: 1.05:1 (Fail). Neither meets AA at body size — nudging one color to #0D503E clears it.
Triadic (soft) — workable but not a textbook harmony (harmony 48/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.0:1, below the 4.5:1 minimum. Nudging one colour to #0D503E clears AA.
Their CIE76 ΔE is about 47 — very different.
clearly different colours (ΔE 47).
Explore each color: HellionGreen #87C5AE · Heather #B4AFE1 · Shades: HellionGreen shades · Heather shades · Contrast checker →