#524B4BMatterhorn (#524B4B) is a grey neutral with an OKLCH hue of 18°, lightness 0.42 and chroma 0.009. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #524B4B |
|---|---|
| RGB | rgb(82, 75, 75) |
| HSL | hsl(0, 4%, 31%) |
| HSV | hsv(0, 9%, 32%) |
| CMYK | cmyk(0%, 9%, 9%, 68%) |
| CIE Lab | lab(32.6 2.9 1.1) |
| OKLCH | oklch(0.420 0.009 18) |
Under warm 2700K interior light Matterhorn shifts subtly: takes on a red cast; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 1), so it is a lighting-stable choice.
#554945 — ΔE 1.0, shifts subtly: takes on a red cast#554b49 — ΔE 0.6, is virtually unchanged#524b4b — ΔE 0.0, is virtually unchanged#524b4c — ΔE 0.2, is virtually unchangedTest Matterhorn 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 8.51:1 and against black 2.47:1, so white text is the stronger pairing. That pairing passes WCAG AA for body text. Avoid black 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.
#a6a0a0 · #817a7a · #524b4b · #3c3636 · #1d1818 · #040202
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.
#8b6550 · #7f4f45 · #524b4b · #5a2c3a · #441f35 · #2e142c
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.
#b6a089 · #a47e53 · #776552 · #524b4b · #4e2427 · #310c10
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.
#88d4d5 · #a28384 · #786767 · #524b4b · #432828 · #211112
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#eaf4f4 · #b3a6a6 · #616768 · #524b4b · #3e3232 · #000101
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.
#f4f1f1 · #ccc9c9 · #524b4b · #2a2525 · #080505 · #e54e5f
The same quiet ground carrying one bright gold voice — the high-energy pairing a cool or muted anchor cannot reach through its own temperature.
#f4f1f1 · #ccc9c9 · #524b4b · #2a2525 · #080505 · #dbc54e
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#e1f7f7 · #7bb5b6 · #237375 · #524b4b · #003e40 · #0a0001
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#e1f7f7 · #84b6a2 · #306e88 · #524b4b · #063f2f · #000409
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ebf6e7 · #97b38e · #4a6791 · #524b4b · #1f3656 · #000200
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f3f3e2 · #adac81 · #237375 · #524b4b · #342f54 · #000202
#6f6969 · #8c8787 · #a9a5a5 · #c5c3c3 · #e2e1e1
#443f3f · #373232 · #292626 · #1b1919 · #0e0d0d
Its moderate chroma lets it work in mid-size areas — upholstery, secondary UI surfaces, editorial blocks — without overwhelming neighbors.