Green color · XKCD survey name
Acid Green Color Code: #8FFE09
Acid Green is a medium, vivid yellow-green color with the hexadecimal value #8FFE09. In RGB it is 143, 254, 9 and in HSL it is 87°, 99%, 52%. Black text reads best on it (16.34:1 contrast).
Acid Green color values
#8FFE09
rgb(143, 254, 9)
hsl(87, 99%, 52%)
87, 96%, 100%
hwb(87 4% 0%)
44%, 0%, 96%, 0%
9436681
CMYK is a standard screen-to-print conversion. Printed results depend on inks, paper and color profiles.
What is Acid Green?
“Acid Green” is a crowd-sourced name from the XKCD Color Survey, in which participants typed names for colors they were shown. It is a popular everyday label rather than an official standard.
Its hue angle of 87° places it in the yellow-green part of the color wheel, with 99% saturation (vivid) and 52% lightness (medium). It sits between warm and cool.
Compared with the other green colors in the Aqeeb Studio library, it is lighter than 63% of them and more saturated than 84% of them.
Its relative luminance is 0.767, which makes it a very light color. That is above the 0.179 crossover point at which black and white text have equal contrast, so black text has the advantage.
Acid Green counts as a light color: its HSL lightness is 52% and its relative luminance is 0.767. Black text reads best on it (16.34:1 contrast).
Text contrast on Acid Green
| Text | Preview | Ratio | AA normal | AA large | AAA normal | AAA large |
|---|---|---|---|---|---|---|
| White text | Sample text | 1.28:1 Poor | Fail | Fail | Fail | Fail |
| Black text | Sample text | 16.34:1 Excellent | Pass | Pass | Pass | Pass |
Ratios use the WCAG 2 formula and are truncated, never rounded up. Test any pair with the contrast checker.
Colors that go with Acid Green
Complementary color
Complementary colors sit directly opposite each other on the color wheel (180° apart). They give the strongest hue contrast, which suits calls to action and accents.
Analogous colors
Analogous colors are neighbors on the wheel, 30° either side of the base hue. They blend smoothly and are easy to combine in backgrounds, gradients and illustrations.
Triadic colors
A triadic scheme uses three hues spaced 120° apart. It is lively yet balanced, and works best when one color leads and the other two act as accents.
Split-complementary colors
Split-complementary keeps the base color and uses the two colors on either side of its complement (150° and 210°). The contrast is strong but gentler than a direct complement.
Tetradic colors
A tetradic (rectangle) scheme combines two complementary pairs at 0°, 60°, 180° and 240°. It offers variety but needs one dominant color to stay balanced.
Monochromatic variants
Monochromatic variants keep the same hue and saturation and only change lightness, which makes them dependable for UI scales and subtle layered designs.
A “≈” before a name means the exact harmony color has no named match, so the link goes to the closest named color.
Tints and shades of Acid Green
Lighter tints (mixed with white)
Darker shades (mixed with black)
Select any swatch to copy its HEX code. Build longer scales with the tints and shades tool.
Similar colors
Where to use Acid Green
- Card, highlight and section backgrounds with dark text (16.34:1 contrast with black)
- Accents that need to stand out: call-to-action buttons, charts and illustrations
- Calm backgrounds and section fills
- Success and confirmation states (with a label or icon)
- Eco, health and finance-style branding
- Charts, maps and nature illustrations
Use Acid Green in CSS
:root {
--color-acid-green: #8FFE09;
}
.element {
color: var(--color-acid-green);
background-color: #8FFE09;
border: 2px solid #8FFE09;
}Questions about Acid Green
What is the HEX code for Acid Green?
Acid Green is #8FFE09.
What is the RGB value of Acid Green?
The RGB value of Acid Green is 143, 254, 9: 143 red, 254 green and 9 blue on a 0–255 scale, written rgb(143, 254, 9) in CSS.
What is the HSL value of Acid Green?
The HSL value of Acid Green is 87°, 99%, 52% (hue, saturation, lightness), written hsl(87, 99%, 52%) in CSS.
What is the CMYK value of Acid Green?
A standard conversion gives about C 44%, M 0%, Y 96%, K 0%. Real print results depend on the inks, paper and color profile, so treat CMYK here as a reference value.
Is Acid Green a light or dark color?
Acid Green counts as a light color: its HSL lightness is 52% and its relative luminance is 0.767. Black text reads best on it (16.34:1 contrast).
How does Acid Green look with white text?
White text on Acid Green has a contrast ratio of 1.28:1, rated Poor. It falls below the WCAG minimum for text.
How does Acid Green look with black text?
Black text on Acid Green has a contrast ratio of 16.34:1, rated Excellent. It meets WCAG AA for normal text.
What colors go well with Acid Green?
Vivid Purple is its complementary color, and Sunny Yellow sits beside it as an analogous color. Lighter and darker variants of the same hue also work well for monochromatic palettes.
Where can Acid Green be used?
It suits card, highlight and section backgrounds with dark text (16.34:1 contrast with black); accents that need to stand out: call-to-action buttons, charts and illustrations; calm backgrounds and section fills.
How do I use Acid Green in CSS?
Use color: #8FFE09; for text, background-color: #8FFE09; for fills, or define a custom property such as --color-acid-green: #8FFE09; and reuse it with var(--color-acid-green).
About this color page
Crowd-sourced name from the XKCD Color Survey (CC0). Values are calculated from the HEX code; color names are labels, not trademarks or standards unless stated. Screens render colors differently, so always check important colors on your own device. See the disclaimer.