#40E0D0Turquoise (#40E0D0) is a very light, saturated blue-green with an OKLCH hue of 185°, lightness 0.82 and chroma 0.131. 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 | #40E0D0 |
|---|---|
| RGB | rgb(64, 224, 208) |
| HSL | hsl(174, 72%, 56%) |
| HSV | hsv(174, 71%, 88%) |
| CMYK | cmyk(71%, 0%, 7%, 12%) |
| CIE Lab | lab(81.3 -44.1 -4) |
| OKLCH | oklch(0.822 0.131 185) |
Under warm 2700K interior light Turquoise shifts subtly: leans toward green, loses intensity; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 2.3), so it is a lighting-stable choice.
#61dbc2 — ΔE 2.3, shifts subtly: leans toward green, loses intensity#53e1cc — ΔE 1.1, shifts subtly: leans toward green#40e0d0 — ΔE 0.0, is virtually unchanged#3ce1d3 — ΔE 0.4, is virtually unchangedAgainst white it measures 1.64:1 and against black 12.79:1, 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.
#c7fff7 · #40e0d0 · #15baac · #009085 · #00685f · #00423c
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.
#cdf4ff · #6beff8 · #40e0d0 · #53caa5 · #64b37e · #6f9b5d
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.
#40e0d0 · #7eacca · #009c90 · #0072a3 · #005b53 · #003853
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.
#cdf2ec · #40e0d0 · #ce6882 · #266e66 · #054e48 · #032e2a
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#40e0d0 · #b3a4a7 · #657b78 · #4e4445 · #08211e · #030001
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.
#fceef0 · #d5c4c7 · #a9979a · #311c21 · #0d0103 · #40e0d0
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#e7e7c1 · #40e0d0 · #8bc28d · #ed2fa1 · #463455 · #1b0621
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#efe0bc · #40e0d0 · #c2a5bc · #d2665b · #4c3746 · #041409
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#40e0d0 · #aea3bd · #8465a7 · #673b00 · #2d1600 · #04000d
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#40e0d0 · #a1a7c2 · #6470b3 · #7c1d3d · #241c00 · #130003
#66E5D7 · #82EADD · #9BEFE4 · #B1F4EB · #C7F9F1
#19B9AA · #009186 · #006C63 · #004842 · #002723
#6DDBCE · #8BD5CB · #A3CFC9
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.