Farrow & Ball does not publish LRV; this value is estimated from the color’s hex using standard relative-luminance calculation. The matte estate finish typically reads lower.
Acid Drop is not subtle, and that is the point. It reads as a saturated chartreuse, a true yellow-green that sits right at the intersection of citrus and foliage. On a color card it can look almost neon, but on the wall it settles into something more layered, especially in Farrow & Ball's chalkier finishes.
In person, the green note is more prominent than you might expect from the swatch. The yellow is clearly there, but the overall impression leans toward a sharp, acidic green, like the inside of a Granny Smith apple. It has real visual punch, the kind of color that pulls your eye immediately.
In bright natural light, Acid Drop reads its most electric, almost glowing. In dimmer or north-facing rooms, the green undertone deepens and the color becomes a touch more olive, losing some of its zing. Evening lamplight pushes it warmer, letting the golden-yellow base come forward. It shifts more than most mid-tone colors, which is part of its appeal.
The dominant undertone is yellow, specifically a warm, golden yellow that provides the backbone of the color. But what makes Acid Drop distinctive is the strong green overlay. This is not a butter yellow or a soft gold. The green pigment is muscular here, giving the color its tart, almost sour character.
In cooler light or on a shadowed wall, the green undertone takes charge and the color can drift toward olive or even a muted khaki territory. In full sun or warm artificial light, the golden-yellow base reasserts itself and the color feels more purely citrus. The finish you choose matters too. Estate Emulsion's flat, chalky surface absorbs light and softens the green note slightly, while a Modern Eggshell on trim or furniture will amp up the sharpness and saturation.
There is no blue in this color and no gray to speak of. It stays firmly on the warm side of the spectrum. If you are worried about it reading cold, don't be. Even in its greenest moments, Acid Drop holds onto its warmth.
This color works best when you commit to it. Half-measures, like a single narrow hallway wall, can make it feel random. A full room, or at least a generous accent wall, lets the color develop the presence it needs. It is especially effective in rooms with good natural light, where the chartreuse can shift and play throughout the day.
Living rooms and dining rooms are strong candidates. Acid Drop brings an energizing quality to social spaces without feeling frantic. In a dining room especially, evening light and candlelight pull the gold forward, giving the space a warm, convivial glow. It also works well in kitchens, mudrooms, or any transitional space where you want personality without formality.
Bedrooms are possible but require careful pairing. The color is stimulating by nature, so balance it with calm, neutral bedding and soft lighting. Used on an accent wall behind a headboard, Acid Drop can add character without overwhelming the room. Avoid using it in small windowless spaces where the green can turn murky.
Acid Drop turns a dining room into a destination. Candlelight and warm bulbs pull the gold forward, making the space feel inviting for evening meals. Pair with a dark wood table and white tableware for grounding contrast.
In a living room with decent natural light, Acid Drop creates genuine energy without feeling hectic. Ground it with natural materials like linen, leather, and warm wood tones. Serge on the trim adds a polished edge.
A single accent wall in Acid Drop works well behind a sofa or shelving unit, giving the room a focal point. Keep the surrounding walls in Wevet or another soft white to let the chartreuse hold focus.
Best used as an accent wall behind the headboard rather than on all four walls. Balance the stimulating color with neutral bedding in cream, oatmeal, or soft gray. The warmth of the gold undertone keeps it from feeling jarring at night.
Acid Drop demands pairings with confidence. The best partners either ground its energy or lean into the boldness without competing. Wevet is Farrow & Ball's recommended white here, and it is a smart choice. Its barely-there warmth keeps the contrast clean without turning sterile. For trim and architectural detail, Serge provides a deep, sophisticated anchor that lets the chartreuse sing without floating off the walls.
Charlotte's Locks is the wild card pairing, and it works beautifully. That burnt orange sits across from chartreuse on the color wheel, creating a complementary tension that feels intentional and alive. Use it on a door, in upholstery, or as a painted accent piece.
Purple tones can create an uneasy vibration against chartreuse, making both colors look garish rather than intentional.
A blue-gray trim next to Acid Drop creates a temperature clash. The cool gray deadens the warmth of the chartreuse and both colors look confused.
A true red and this particular yellow-green fight for dominance, creating a Christmas-tree palette that reads as festive rather than designed.
Acid Drop has warm, golden-yellow undertones with a strong green overlay. The yellow base keeps it on the warm side of the spectrum, but the visible green pigment gives it its signature tart, chartreuse character. In cooler light the green becomes more dominant, while warm light draws out the gold.
Farrow & Ball recommends Wevet as a complementary white and Serge as a trim color. Charlotte's Locks, a burnt orange, provides a striking complementary accent. Natural materials like warm wood, brass hardware, and linen textiles all support the color well. Avoid cool blue-grays or pastels that clash with its warm energy.
Acid Drop is a warm color. Its golden-yellow base keeps it firmly on the warm side even though it has a prominent green note. Unlike cooler sage or mint greens, this chartreuse always retains warmth. In north-facing rooms it may read a bit more olive, but it never turns cold.
Estate Emulsion is the best choice for walls. Its ultra-matte, chalky finish softens the intensity of the chartreuse slightly and gives the color depth and movement. For trim, Modern Eggshell in Serge or Wevet provides a subtle sheen contrast. If you are using Acid Drop on a piece of furniture, Full Gloss or Modern Eggshell will make the color sharper and more saturated.
Acid Drop is Farrow & Ball No. 9908. Its hex value is #C1C365 and its LRV is 51.3, placing it squarely in the mid-tone range. It reflects about half the light that hits it, so it will not brighten a dim room but will not absorb all the light either.
It can, but expect the color to shift. North-facing light is cooler and will push the green undertone forward, making Acid Drop lean more olive or khaki than chartreuse. If you want the full citrusy effect, south or west-facing rooms are ideal. In a north room, test a large sample on the wall and observe it at different times of day before committing.
