#3B444BArsenic (#3B444B) is a grey neutral with an OKLCH hue of 241°, lightness 0.38 and chroma 0.017. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #3B444B |
|---|---|
| RGB | rgb(59, 68, 75) |
| HSL | hsl(206, 12%, 26%) |
| HSV | hsv(206, 21%, 29%) |
| CMYK | cmyk(21%, 9%, 0%, 71%) |
| CIE Lab | lab(28.3 -1.9 -5.4) |
| OKLCH | oklch(0.381 0.017 241) |
Under warm 2700K interior light Arsenic is virtually unchanged; in north-facing or shaded light it shifts subtly: takes on a blue cast. Overall drift across common illuminants is small (max ΔE ≈ 1), so it is a lighting-stable choice.
#3f4246 — ΔE 1.0, is virtually unchanged#3e4449 — ΔE 0.5, is virtually unchanged#3b444b — ΔE 0.0, is virtually unchanged#3b444c — ΔE 0.2, shifts subtly: takes on a blue castTest Arsenic 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 9.93:1 and against black 2.11:1, 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.
#939ba1 · #6e767c · #3b444b · #2a3239 · #0e151a · #000102
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.
#376d76 · #225a6f · #3b444b · #1b3356 · #1b2143 · #16102f
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.
#b8b3d0 · #789ebb · #7c72a3 · #5f5a72 · #3b444b · #022c45
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.
#d5a781 · #6d8495 · #56636d · #3b444b · #132939 · #040f18
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f7f0eb · #9ba5ac · #5f5a57 · #3b444b · #242d34 · #020100
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.
#eef2f6 · #c6cbcf · #3b444b · #22292e · #03080c · #f29a46
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#feefe3 · #bf9b7d · #79512c · #3b444b · #422303 · #000713
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#feefe3 · #c6968c · #6b5924 · #3b444b · #461e17 · #080400
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ffecf1 · #c494a1 · #55622f · #3b444b · #273006 · #050001
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#fbedf9 · #ba96b5 · #79512c · #3b444b · #0d341b · #110400
#565F65 · #737B81 · #91989D · #B1B6BB · #D1D5D9
#31393F · #272E34 · #1E2429 · #141A1E · #0C1014
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.