#30ff21 - Acid Reflux color

A vivid, electric lime-green with a bright, yellowish undertone, this color reads as high-energy and modern. It feels like fresh spring grass kissed by sunlight or a glowing LED accent — intense, youthful, and attention-grabbing. At full saturation it becomes almost neon, ideal for bold accents, call-to-action buttons, or sporty branding, though it can overwhelm large areas. It contrasts strongly with deep charcoal, navy, and pure black, and pairs cleanly with crisp white and muted neutrals.

#30ff21 color RGB value is 48, 255, 33, and the CMYK value is 0.812, 0.00, 0.871, 0.00. Alternative names for that color are: acid reflux, green, lime, harlequin, electric lime.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	48, 255, 33	rgb(48, 255, 33)
CMYK	0.812, 0.00, 0.871, 0.00	-
sRGB	0.188, 1.00, 0.129	rgb(18.8%, 100%, 12.9%)
Adobe® 98 RGB compatible	0.584, 1.00, 0.269	color(a98-rgb, 0.584, 1, 0.269)
HCT	142, 104, 88.1	color(--hct, 142, 71.9%, 88.1%)
HSL	116, 100, 56.5	hsl(116, 100%, 56.5%)
HSV	116, 87.1, 100	color(--hsv, 116, 87.1%, 100%)
HWB	116, 12.9, 0.00	hwb(116, 12.9%, 0%)
Lab	88.2, -76.1, 78.0	lab(88.2%, -76.1, 78)
P3	0.487, 0.986, 0.326	color(display-p3, 0.487, 0.986, 0.326)
XYZ D50	0.400, 0.724, 0.108	color(xyz-d50, 0.4, 0.724, 0.108)