#2F4F4FAlso known as Dark Slate Grey.
Dark Slate Gray (#2F4F4F) is a dark, muted blue-green with an OKLCH hue of 196°, lightness 0.4 and chroma 0.038. 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 | #2F4F4F |
|---|---|
| RGB | rgb(47, 79, 79) |
| HSL | hsl(180, 25%, 25%) |
| HSV | hsv(180, 41%, 31%) |
| CMYK | cmyk(41%, 0%, 0%, 69%) |
| CIE Lab | lab(31.3 -11.7 -3.7) |
| OKLCH | oklch(0.403 0.038 196) |
Under warm 2700K interior light Dark Slate Gray 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 ≈ 1.1), so it is a lighting-stable choice.
#354d49 — ΔE 1.1, shifts subtly: leans toward green#334f4d — ΔE 0.5, shifts subtly: leans toward green#2f4f4f — ΔE 0.0, is virtually unchanged#2f4f50 — ΔE 0.2, shifts subtly: leans toward sky blueAgainst white it measures 8.93:1 and against black 2.35:1, 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.
#86a09f · #5f7b7b · #2f4f4f · #193737 · #001818 · #000202
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.
#447184 · #22636e · #2f4f4f · #00483e · #063c29 · #102f16
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.
#8ca2b8 · #5c85ac · #536679 · #2f4f4f · #003737 · #001c1c
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.
#b4787b · #586b6b · #2f4f4f · #0d3233 · #001717 · #000202
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f9efef · #9caaa9 · #665f60 · #2f4f4f · #273434 · #020101
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.
#e8f5f5 · #bdcdcc · #2f4f4f · #102828 · #000606 · #e54d64
The same quiet ground carrying one bright gold voice — the high-energy pairing a cool or muted anchor cannot reach through its own temperature.
#e8f5f5 · #bdcdcc · #2f4f4f · #102828 · #000606 · #eebc4d
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#d2e2bf · #98d2aa · #da5c64 · #8d5f80 · #2f4f4f · #210617
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffeded · #c398af · #85533c · #2f4f4f · #482338 · #0c0100
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#f8eefc · #b69cc1 · #7a5b2c · #2f4f4f · #432c02 · #020004
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f0f0ff · #a3a2cb · #874f53 · #2f4f4f · #363303 · #090001
#4C6969 · #6B8383 · #8A9F9F · #AABCBC · #CBD9D9
#254242 · #1C3636 · #132A2A · #0A1F1F · #041414
#354E4E · #3B4C4C · #404B4B
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.