#005F66 · #045B7D
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 78/100 (monochrome) · Distinguishable 18/100 (hard to tell apart) · Match 59/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Dark Vivid Cyan and Dark Vivid Cyan are a clear pair (ΔE 19). They have closely related hues (13° apart) and their lightness is similar, so they read as two same-weight colours.
Dark Vivid Cyan text on Dark Vivid Cyan: 1.01:1 (Fail); Dark Vivid Cyan text on Dark Vivid Cyan: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #89D5DC clears it.
Monochrome — monochrome — a recognised, balanced pairing (harmony 78/100). 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 #89D5DC clears AA.
Their CIE76 ΔE is about 19 — a clear pair.
clearly different colours (ΔE 19).
Explore each color: Dark Vivid Cyan #005F66 · Dark Vivid Cyan #045B7D · Shades: Dark Vivid Cyan shades · Dark Vivid Cyan shades · Contrast checker →