#431705Old Study (#431705) is a very dark, soft red with an OKLCH hue of 41°, lightness 0.27 and chroma 0.074. It sits on the warm side of the color wheel. In practice it behaves as a grounding tone — suited to text, outlines, and shadowed surfaces.
| HEX | #431705 |
|---|---|
| RGB | rgb(67, 23, 5) |
| HSL | hsl(17, 86%, 14%) |
| HSV | hsv(17, 93%, 26%) |
| CMYK | cmyk(0%, 66%, 93%, 74%) |
| CIE Lab | lab(14.5 20.1 19.9) |
| OKLCH | oklch(0.270 0.074 41) |
Under warm 2700K interior light Old Study is virtually unchanged; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 0.5), so it is a lighting-stable choice.
#431504 — ΔE 0.5, is virtually unchanged#441704 — ΔE 0.3, is virtually unchanged#431705 — ΔE 0.0, is virtually unchanged#431705 — ΔE 0.0, is virtually unchangedTest Old Study 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 15.4:1 and against black 1.36:1, 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.
#d2b3a7 · #af8b7e · #8c6556 · #6a4030 · #431705 · #230400
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.
#58401f · #4f2c0e · #431705 · #350909 · #25010a · #150008
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.
#bdb497 · #b68a79 · #867741 · #7a4f3f · #474029 · #431705
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.
#85c8df · #8f7c74 · #745a50 · #4d3f39 · #431705 · #1b0602
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#ebf4f7 · #baaeaa · #707678 · #463a36 · #431705 · #0c1315
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.
#eaf4f8 · #c1cdd1 · #95a2a7 · #1c2d33 · #000b11 · #431705
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#dad6b0 · #caa1b4 · #24888c · #31404e · #431705 · #05150e
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#e2f6fd · #84beba · #53789f · #004745 · #431705 · #051222
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#e5f7ed · #90bda5 · #6d6fa0 · #38395e · #431705 · #01170c
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#ecf5e6 · #a4ba92 · #3c7f94 · #483356 · #431705 · #00151d
#613828 · #805A4B · #A07D70 · #C0A298 · #E1C9C0
#3B1303 · #320F02 · #2A0B01 · #230701 · #1B0400
#3E1C0E · #381F16 · #32221C
As a deep tone it works for grounding elements — text, outlines, and shadowed surfaces — rather than open fields. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.