#feff00 - Bat-Signal color

A vivid, high-energy yellow-green that reads as an electric lime or chartreuse—brilliant, intensely saturated, and strikingly luminous. It sits squarely between yellow and green, evoking citrus zest, neon signage, fresh spring foliage, and synthetic fluorescent pigments. Its extreme brightness makes it attention-grabbing and ideal for accents, high-visibility applications, sporty branding, and modern, playful palettes; used sparingly it energizes layouts, while overused it can feel overpowering or harsh on the eyes.

#feff00 color RGB value is 254, 255, 0, and the CMYK value is 0.00392, 0.00, 1.00, 0.00. Alternative names for that color are: bat-signal, yellow, laser lemon.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	254, 255, 0	rgb(254, 255, 0)
CMYK	0.00392, 0.00, 1.00, 0.00	-
sRGB	0.996, 1.00, 0.00	rgb(99.6%, 100%, 0%)
Adobe® 98 RGB compatible	0.997, 1.00, 0.234	color(a98-rgb, 0.997, 1, 0.234)
HCT	111, 75.6, 97.1	color(--hct, 111, 52.2%, 97.1%)
HSL	60.2, 100, 50.0	hsl(60.2, 100%, 50%)
HSV	60.2, 100, 100	color(--hsv, 60.2, 100%, 100%)
HWB	60.2, 0.00, 0.00	hwb(60.2, 0%, 0%)
Lab	97.5, -16.2, 93.3	lab(97.5%, -16.2, 93.3)
P3	0.997, 1.00, 0.331	color(display-p3, 0.997, 1, 0.331)
XYZ D50	0.817, 0.937, 0.111	color(xyz-d50, 0.817, 0.937, 0.111)