#B9FF03Atomic Lime (#B9FF03) is a very light, vivid yellow-green with an OKLCH hue of 127°, lightness 0.92 and chroma 0.237. It sits on the transitional side of the color wheel. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #B9FF03 |
|---|---|
| RGB | rgb(185, 255, 3) |
| HSL | hsl(77, 100%, 51%) |
| HSV | hsv(77, 99%, 100%) |
| CMYK | cmyk(27%, 0%, 99%, 0%) |
| CIE Lab | lab(92.5 -49.1 88.7) |
| OKLCH | oklch(0.919 0.237 127) |
Under warm 2700K interior light Atomic Lime shifts subtly: leans toward yellow; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 2.2), so it is a lighting-stable choice.
#c6f800 — ΔE 2.2, shifts subtly: leans toward yellow#c2ff00 — ΔE 1.0, shifts subtly: leans toward yellow#b9ff03 — ΔE 0.0, is virtually unchanged#b8ff0d — ΔE 0.1, is virtually unchangedTest Atomic Lime 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 1.21:1 and against black 17.37:1, so black text is the stronger pairing. That pairing passes WCAG AA for body text. Avoid white 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.
#b9ff03 · #a3e100 · #83b600 · #648c00 · #476500 · #2b4000
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.
#b9ff03 · #d7db00 · #debb00 · #de9d00 · #d97f00 · #d55d00
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.
#b9ff03 · #5dddc5 · #84b800 · #009c87 · #537600 · #005a4e
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.
#b9ff03 · #b4ca98 · #88ad4e · #a040e4 · #314800 · #1a2900
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#b9ff03 · #cdc2d8 · #839172 · #57505f · #1b2705 · #020005
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.
#f4effa · #ccc6d3 · #9f98a7 · #271e2f · #06010c · #b9ff03
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#b9ff03 · #d8cda9 · #f431b6 · #4d6e54 · #353052 · #230609
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#b9ff03 · #e2c3df · #8077ca · #8a5471 · #2a3755 · #04120a
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#b9ff03 · #a2ccf3 · #0090ea · #9c0042 · #470019 · #000615
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#b9ff03 · #91d3e5 · #009bb8 · #7600b3 · #430b00 · #05000f
#C2FF54 · #CAFF76 · #D2FF90 · #D9FFA6 · #E1FFBA
#96D000 · #74A300 · #557700 · #374F00 · #1B2A00
#C2FA65 · #CCF590 · #D5F0B2
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.