#547CB6 · #9C732C
Four independent scores (read the one that fits your goal): Readability 0/100 (fail) · Harmony 100/100 (complementary) · Distinguishable 100/100 (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.
Steel Blue and Yellow are very different (ΔE 79). They have near-opposite hues (177° apart) and their lightness is similar, so they read as two same-weight colours.
Steel Blue text on Yellow: 1.01:1 (Fail); Yellow text on Steel Blue: 1.01:1 (Fail). Neither meets AA at body size — nudging one color to #000932 clears it.
Complementary — complementary — a recognised, balanced pairing (harmony 100/100). 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 #000932 clears AA.
Their CIE76 ΔE is about 79 — very different.
clearly different colours (ΔE 79).
Explore each color: Steel Blue #547CB6 · Yellow #9C732C · Shades: Steel Blue shades · Yellow shades · Contrast checker →