#616C51Hinterland (#616C51) is a mid-tone, muted yellow-green with an OKLCH hue of 126°, lightness 0.51 and chroma 0.043. It sits on the transitional side of the color wheel. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #616C51 |
|---|---|
| RGB | rgb(97, 108, 81) |
| HSL | hsl(84, 14%, 37%) |
| HSV | hsv(84, 25%, 42%) |
| CMYK | cmyk(10%, 0%, 25%, 58%) |
| CIE Lab | lab(44 -9.5 13.8) |
| OKLCH | oklch(0.514 0.043 126) |
Under warm 2700K interior light Hinterland shifts subtly: leans toward yellow; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 1.1), so it is a lighting-stable choice.
#66694b — ΔE 1.1, shifts subtly: leans toward yellow#656c4f — ΔE 0.6, shifts subtly: leans toward yellow#616c51 — ΔE 0.0, is virtually unchanged#616d52 — ΔE 0.3, is virtually unchangedTest Hinterland 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 5.57:1 and against black 3.77:1, so white text is the stronger pairing. That pairing passes WCAG AA for body text.
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.
#b7c0aa · #8f9a81 · #616c51 · #485239 · #29311c · #0c1303
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.
#6c967d · #62835e · #616c51 · #595a29 · #514519 · #47320e
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.
#a7cbc2 · #6db2a3 · #6d8c84 · #616c51 · #43522a · #2a3712
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.
#c7cfbd · #a2ae92 · #848a7c · #616c51 · #533d69 · #28301b
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f3f0f8 · #7f837a · #616c51 · #4f4d52 · #1e2118 · #010102
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.
#eff4e8 · #c6ccbf · #616c51 · #212816 · #030700 · #add566
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#f5eefe · #8a789e · #616c51 · #58436f · #271637 · #010200
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#f5eefe · #777fa6 · #616c51 · #683e5e · #181c3d · #030003
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#e7f4ff · #6485a4 · #616c51 · #703c48 · #37101b · #00040f
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#e2f6fc · #568b98 · #616c51 · #58436f · #381208 · #020005
#788269 · #8F9882 · #A7AF9C · #C0C6B7 · #D9DED2
#505A41 · #3F4832 · #2F3724 · #202616 · #121709
#626B56 · #646A5B · #65695F
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.