#66D0C0Patina (#66D0C0) is a light, soft blue-green with an OKLCH hue of 183°, lightness 0.79 and chroma 0.101. It sits on the cool side of the color wheel. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #66D0C0 |
|---|---|
| RGB | rgb(102, 208, 192) |
| HSL | hsl(171, 53%, 61%) |
| HSV | hsv(171, 51%, 82%) |
| CMYK | cmyk(51%, 0%, 8%, 18%) |
| CIE Lab | lab(77.1 -34.5 -1.4) |
| OKLCH | oklch(0.790 0.101 183) |
Under warm 2700K interior light Patina shifts subtly: leans toward green; in north-facing or shaded light it shifts subtly: leans toward sky blue. Overall drift across common illuminants is small (max ΔE ≈ 2.2), so it is a lighting-stable choice.
#79cbb3 — ΔE 2.2, shifts subtly: leans toward green#71d1bc — ΔE 1.1, shifts subtly: leans toward green#66d0c0 — ΔE 0.0, is virtually unchanged#65d1c3 — ΔE 0.4, shifts subtly: leans toward sky blueTest Patina in the color lighting simulator — sweep it through daylight, warm 2700K light, 4000K LED, and shade alongside the rest of your palette.
Against white it measures 1.85:1 and against black 11.35:1, so black text is the stronger pairing. That pairing passes WCAG AA for body text. Avoid white text on this color entirely.
One color explored: close hues with real lightness and chroma structure, so the palette is the anchor through value rather than a set of colors.
#c8fff5 · #66d0c0 · #51b6a7 · #2e8e81 · #00685d · #00423b
The anchor's neighbours on the wheel — everything shares an undertone, so the chord carries color without anything having to be muted to get along.
#aaeeff · #81e0e4 · #66d0c0 · #69bb9b · #6da579 · #6f8e5d
The mid-gap pairing — sage and mustard, terracotta and olive. A foil rotated 40–65° toward warm or cool: too far to be kin, too near to argue, carried by temperature and a deliberate value offset.
#66d0c0 · #7da1b7 · #358e82 · #066991 · #005148 · #062f43
One deliberately opposed voice — a single restrained counterpoint across the wheel, or temperature against temperature where the anchor is too muted to carry a loud opposite.
#c9e5e0 · #66d0c0 · #c17388 · #30625b · #15433d · #072521
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#fbeef1 · #66d0c0 · #91a39f · #655d5f · #192b28 · #030101
This color as a ground rather than a subject — its own restraint held across a narrow value band, carrying one saturated voice from the opposite temperature.
#fceef1 · #d4c4c8 · #a9979b · #311c22 · #0d0103 · #66d0c0
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#ffecf0 · #66d0c0 · #ca899a · #8d445a · #470f23 · #000201
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffecf0 · #66d0c0 · #bd8cb5 · #904739 · #3e1339 · #070000
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#f5eeff · #66d0c0 · #a893c9 · #875115 · #3d1f00 · #020009
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#edf1ff · #66d0c0 · #8d9cd2 · #8d445a · #312600 · #0c0002
#7ED7C9 · #93DFD2 · #A8E6DB · #BBEDE4 · #CFF5ED
#4AAB9D · #2E887C · #0D665C · #00453D · #002621
#7ECCBF · #91C7BE · #A2C3BC
Its moderate chroma lets it work in mid-size areas — upholstery, secondary UI surfaces, editorial blocks — without overwhelming neighbors. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.