#3F3939Eclipse (#3F3939) is a grey neutral with an OKLCH hue of 18°, lightness 0.35 and chroma 0.008. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #3F3939 |
|---|---|
| RGB | rgb(63, 57, 57) |
| HSL | hsl(0, 5%, 24%) |
| HSV | hsv(0, 10%, 25%) |
| CMYK | cmyk(0%, 10%, 10%, 75%) |
| CIE Lab | lab(24.6 2.6 0.9) |
| OKLCH | oklch(0.351 0.008 18) |
Under warm 2700K interior light Eclipse is virtually unchanged; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 0.8), so it is a lighting-stable choice.
#413735 — ΔE 0.8, is virtually unchanged#413938 — ΔE 0.4, is virtually unchanged#3f3939 — ΔE 0.0, is virtually unchanged#3f393a — ΔE 0.2, is virtually unchangedTest Eclipse 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 11.32:1 and against black 1.86:1, 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.
#9f9a9a · #7a7575 · #575151 · #3f3939 · #181313 · #020101
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.
#76513d · #6a3c32 · #3f3939 · #461a29 · #310e24 · #1d041c
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.
#c0aa93 · #b18182 · #8e6a3f · #63523f · #3f3939 · #3b1316
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 · #8d6f6f · #645354 · #3f3939 · #301718 · #100404
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#eaf4f4 · #c3b6b6 · #7f8686 · #5c4f4f · #3f3939 · #1e2626
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 · #cdcaca · #a39f9f · #3f3939 · #0d0909 · #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 · #cdcaca · #a39f9f · #3f3939 · #0d0909 · #dbc54e
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#e1f7f7 · #8cc6c7 · #469294 · #1d5d5f · #3f3939 · #341d1d
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#e1f7f7 · #95c6b2 · #508da8 · #2b5e4c · #3f3939 · #0e2832
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ebf6e7 · #a7c39e · #6886b1 · #3c5476 · #3f3939 · #1b2816
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f3f3e2 · #bdbd90 · #469294 · #514d74 · #3f3939 · #092a2b
#5f5a5a · #7f7b7b · #9f9c9c · #bfbdbd · #dfdede
#353030 · #2a2626 · #201d1d · #151313 · #0b0a0a
Its moderate chroma lets it work in mid-size areas — upholstery, secondary UI surfaces, editorial blocks — without overwhelming neighbors.