Close to Neon Green
#42FF21
#42FF21 is a mid-tone, vivid green, close to the color Neon Green. In RGB it’s made of 25.9% red, 100% green, and 12.9% blue. Its hue is 111°, with 100% saturation and 56% lightness, so it reads as a cool color. Black text sits best on top of it.
Color codes
Tints, shades & tones
Tints add white, shades add black, tones add gray. Tap any one to open its page.
Tints
Shades
Tones
Color harmonies
Combinations from the color wheel, built around #42FF21.
Split complementary
The two neighbors of the complement: contrast that’s easier to balance.
Open in the palette builder →Tetradic
Two complementary pairs: rich, best with one color in charge.
Open in the palette builder →Contrast & readability
WCAG contrast ratios for text. 4.5:1 is the minimum for body text, 3:1 for large text.
White text on this color
1.35:1 FailBlack text on this color
15.56:1 AAAThis color as text on white
1.35:1 FailThis color as text on black
15.56:1 AAAHow it looks with color blindness
About 1 in 12 men and 1 in 200 women see color differently. Here’s #42FF21 as they’d see it.
#42FF21 in use
A headline in this color
Body text stays dark for reading; the color carries buttons, links, and accents.
On a dark background
Get startedSimilar colors
Questions about #42FF21
What color is #42FF21?
#42FF21 is a mid-tone, vivid green, close to the color Neon Green. In RGB it’s made of 25.9% red, 100% green, and 12.9% blue. Its hue is 111°, with 100% saturation and 56% lightness, so it reads as a cool color. Black text sits best on top of it.
What is #42FF21 in RGB?
#42FF21 is rgb(66, 255, 33): 66 red, 255 green, and 33 blue on a 0–255 scale.
What is #42FF21 in CMYK?
Roughly cmyk(74, 0, 87, 0). Print results depend on paper and press, so proof it before a big print run.
What Pantone is closest to #42FF21?
PANTONE 802 C is the closest match in our list. Screen colors and ink never match perfectly; check a physical Pantone guide.
What color goes with #42FF21?
Its complement #FAD1FE gives the strongest contrast. For something calmer, try its analogous neighbors, or its own tints and shades above.