#4BEC13Becquerel (#4BEC13) is a very light, vivid green with an OKLCH hue of 140°, lightness 0.83 and chroma 0.263. 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 | #4BEC13 |
|---|---|
| RGB | rgb(75, 236, 19) |
| HSL | hsl(105, 85%, 50%) |
| HSV | hsv(105, 92%, 93%) |
| CMYK | cmyk(68%, 0%, 92%, 7%) |
| CIE Lab | lab(82.7 -73.8 77.7) |
| OKLCH | oklch(0.826 0.263 140) |
Under warm 2700K interior light Becquerel shifts subtly: leans toward yellow; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 2.1), so it is a lighting-stable choice.
#68e600 — ΔE 2.1, shifts subtly: leans toward yellow#5ced00 — ΔE 1.0, shifts subtly: leans toward yellow#4bec13 — ΔE 0.0, is virtually unchanged#48ed18 — ΔE 0.3, is virtually unchangedTest Becquerel 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 1.58:1 and against black 13.31:1, 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.
#d8ffcf · #4bec13 · #38c200 · #299600 · #1a6c00 · #0c4500
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.
#8affdd · #00fd99 · #4bec13 · #9ac600 · #aaa600 · #ab8a00
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.
#4bec13 · #00bfbb · #2ea300 · #007b78 · #166000 · #003d3c
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.
#cef8c6 · #4bec13 · #d13fef · #2b7518 · #125300 · #063200
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#4bec13 · #b5a3b8 · #667f61 · #4e4251 · #092305 · #030005
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.
#f7eff8 · #cfc5d1 · #a298a5 · #2a1d2c · #07010a · #4bec13
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#e0e4be · #4bec13 · #a4bc85 · #f6388b · #46375b · #1f0503
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#f1d4f1 · #4bec13 · #d99cc7 · #7c74c9 · #303d57 · #05130f
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#4bec13 · #8dabdc · #1c6def · #89001f · #3f0008 · #000013
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#4bec13 · #74b3d2 · #0082ac · #710084 · #331100 · #050009
#6CF04E · #86F56F · #9DF88B · #B3FCA4 · #C8FFBD
#38C100 · #2A9800 · #1C7000 · #0F4B00 · #042900
#72E559 · #8EDE7E · #A5D69B
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.