#18D17BSeaweed (#18D17B) is a light, saturated green with an OKLCH hue of 155°, lightness 0.76 and chroma 0.183. It sits on the cool side of the color wheel. In practice it behaves as an accent color: strong in focal moments, dominant over large fields.
| HEX | #18D17B |
|---|---|
| RGB | rgb(24, 209, 123) |
| HSL | hsl(152, 79%, 46%) |
| HSV | hsv(152, 89%, 82%) |
| CMYK | cmyk(89%, 0%, 41%, 18%) |
| CIE Lab | lab(74.3 -61.7 31) |
| OKLCH | oklch(0.758 0.183 155) |
Under warm 2700K interior light Seaweed shifts subtly: leans toward yellow-green; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 1.9), so it is a lighting-stable choice.
#47cc71 — ΔE 1.9, shifts subtly: leans toward yellow-green#35d277 — ΔE 1.0, shifts subtly: leans toward yellow-green#18d17b — ΔE 0.0, is virtually unchanged#0ed27d — ΔE 0.3, is virtually unchangedTest Seaweed 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 2.01:1 and against black 10.45:1, 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.
#d1ffe0 · #58e997 · #18d17b · #009555 · #006b3b · #004423
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.
#3bf5e7 · #00e4b6 · #18d17b · #60b647 · #7a9a03 · #827e00
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.
#18d17b · #40a1ae · #008b4e · #00636e · #004a27 · #00292f
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.
#b8dfc4 · #18d17b · #cf5bba · #357f54 · #195e38 · #113c24
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#fdecf9 · #18d17b · #839c8b · #61555e · #112b1b · #030002
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.
#f9eef6 · #d1c4ce · #a597a1 · #2c1c29 · #090107 · #18d17b
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#d8dbb5 · #18d17b · #7ea874 · #e02a5d · #45314c · #1f0903
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#eed1b5 · #18d17b · #a490b9 · #c45b79 · #3d3046 · #0d1304
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#eef1ff · #18d17b · #7c8bed · #a12600 · #480900 · #010011
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#e7f4ff · #18d17b · #339ce8 · #921e81 · #381d00 · #060005
#52D98D · #74E19F · #91E9B1 · #ABF1C3 · #C3F9D4
#00AC63 · #00874C · #006537 · #004423 · #002611
#57CB87 · #77C493 · #8FBD9E
Its chroma is high enough to carry accents, calls to action, and focal moments; large fields of it will dominate a composition. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.