#3D474BLights Out (#3D474B) is a grey neutral with an OKLCH hue of 224°, lightness 0.39 and chroma 0.015. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #3D474B |
|---|---|
| RGB | rgb(61, 71, 75) |
| HSL | hsl(197, 10%, 27%) |
| HSV | hsv(197, 19%, 29%) |
| CMYK | cmyk(19%, 5%, 0%, 71%) |
| CIE Lab | lab(29.4 -3 -3.8) |
| OKLCH | oklch(0.390 0.015 224) |
Under warm 2700K interior light Lights Out is virtually unchanged; 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.
#414546 — ΔE 1.0, is virtually unchanged#404749 — ΔE 0.5, is virtually unchanged#3d474b — ΔE 0.0, is virtually unchanged#3d474c — ΔE 0.2, is virtually unchangedTest Lights Out 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 9.54:1 and against black 2.2:1, 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.
#98a0a3 · #727b7f · #3d474b · #2d373a · #10181b · #000203
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.
#3a716f · #1c6069 · #3d474b · #093a56 · #112847 · #111735
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.
#b3b9d6 · #72a4b7 · #717aaa · #5a5f76 · #3d474b · #003140
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.
#c68f78 · #56666d · #3d474b · #0e2d38 · #00131b · #000204
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f8f0ec · #9ba7ac · #625c5a · #3d474b · #243035 · #030101
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.
#eef3f4 · #c5cacc · #3d474b · #1e2628 · #020507 · #f0763c
The same quiet ground carrying one bright gold voice — the high-energy pairing a cool or muted anchor cannot reach through its own temperature.
#eef3f4 · #c5cacc · #3d474b · #1e2628 · #020507 · #ebbd4d
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#ffeee7 · #c69986 · #814f3a · #3d474b · #482211 · #000408
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffeee7 · #c79699 · #775729 · #3d474b · #491f24 · #130700
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#feecf6 · #c196ae · #656029 · #3d474b · #342f00 · #040002
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f7eefd · #b29ac0 · #814f3a · #3d474b · #203511 · #0c0100
#586165 · #757D80 · #929A9D · #B1B7BA · #D1D6D8
#323B3F · #283033 · #1E2528 · #151B1D · #0C1113
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.