#09B399 · #A388DE
Four independent scores (read the one that fits your goal): Readability 2/100 (fail) · Harmony 47/100 (triadic (soft)) · Distinguishable 74/100 (easy 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.
Light Sea Green and Light Indigo are very different (ΔE 84). They have distinctly different hues (88° apart) and their lightness is different, giving a clear light/dark split.
Light Sea Green text on Light Indigo: 1.11:1 (Fail); Light Indigo text on Light Sea Green: 1.11:1 (Fail). Neither meets AA at body size — nudging one color to #00372D clears it.
Triadic (soft) — workable but not a textbook harmony (harmony 47/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.1:1, below the 4.5:1 minimum. Nudging one colour to #00372D clears AA.
Their CIE76 ΔE is about 84 — very different.
clearly different colours (ΔE 84).
Explore each color: Light Sea Green #09B399 · Light Indigo #A388DE · Shades: Light Sea Green shades · Light Indigo shades · Contrast checker →