Skip to content

#40E137 Color

#40E137 is rgb(64, 225, 55) in RGB, hsl(117, 74%, 55%) in HSL, and about cmyk(72%, 0%, 76%, 12%) in CMYK. It has no registered color name of its own — the closest is SGBUS Green (#55DD33), clearly related but distinguishable side by side at ΔE 5.13. Black text is the more readable choice on this background.

#40E137
HEX#40E137
RGBrgb(64, 225, 55)
HSLhsl(117, 74%, 55%)
HSVhsv(117, 76%, 88%)
CMYKcmyk(72%, 0%, 76%, 12%)
OKLCHoklch(79.7% 0.243 142.3)
LABlab(79.24% -65.15 64.88)
LCHlch(79.24% 91.94 135.12)

What #40E137 Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #40E137, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

SGBUS Green#55DD33ΔE 5.13Lime Green#32CD32ΔE 8.78Vivid Malachite#00CC33ΔE 9.56Screamin' Green#66FF66ΔE 12.14Malachite#0BDA51ΔE 12.78Erin#00FF40ΔE 16.11

Browse the full index of named colors A-Z or every green in the library.

#40E137 Channel Values

How #40E137 breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

ModelChannelsNotes
RGBR 64 · G 225 · B 558-bit channels as sent to the display
HSLH 117° · S 74% · L 55%Easiest model for building lighter and darker variants
HSVH 117° · S 76% · V 88%Matches the picker in most design tools
CMYKC 72% · M 0% · Y 76% · K 12%Approximate ink mix; confirm with an ICC profile before printing
Luminance1.74:1 vs white · 12.04:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #40E137 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

Fails AAWhite text1.74:1AA normal AA large AAA normal
TextBlack text12.04:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #40E137 in the contrast checker.

Colors That Go With #40E137

Pairings derived from color-wheel relationships. The complementary color sits opposite #40E137; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#40E137
Complementary
#D937E1
Analogous
#95E137
Analogous
#37E184
Triadic
#3740E1
Triadic
#E13740
Split comp.
#8437E1
Split comp.
#E13795

Tints & Shades of #40E137

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

#59E552
#73E96D
#8CED87
#AAF2A6
#C4F6C1
#DDFADC

Shades

#29D520
#22B11B
#1C9216
#167311
#10540D
#093107

Want a full 50-950 ramp with semantic roles? Generate design tokens from #40E137.

How #40E137 Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#40E137
Protanopia#D0D039
Protanomaly#AAD738
Deuteranopia#BFBF44
Deuteranomaly#9CCD3F
Tritanopia#69D5D5
Tritanomaly#5CDAAC
Achromatopsia#C4C4C4

Test a full palette in the color blindness simulator.

Using #40E137 in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-40e137: #40E137;
CSS backgroundbackground-color: #40E137;
Tailwind configcolors: { 'color-40e137': '#40E137' }
SwiftUIColor(red: 0.251, green: 0.882, blue: 0.216)
Android XML<color name="color_40e137">#40E137</color>
SVG fillfill="#40E137"

More Green Colors

#40E137 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#40E137 Frequently Asked Questions

What color is #40E137?

#40E137 is a mid-tone green — rgb(64, 225, 55) in RGB and hsl(117, 74%, 55%) in HSL. It carries no registered color name of its own; the closest named color is SGBUS Green (#55DD33), which is clearly related but distinguishable side by side at a CIE76 distance of 5.13.

What is the RGB value of #40E137?

#40E137 is rgb(64, 225, 55) — red 64, green 225, and blue 55 on the 0-255 scale.

What is the CMYK value of #40E137?

#40E137 converts to approximately cmyk(72%, 0%, 76%, 12%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #40E137 be black or white?

Black text is the more readable choice. #40E137 scores 1.74:1 against white and 12.04:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #40E137 as a CSS color keyword?

No. #40E137 is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is limegreen (#32CD32) at a CIE76 distance of 8.78, which is clearly related but distinguishable side by side.

Open #40E137 in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

Keep exploring: every green in the color library, the guide to shades of green, or the full color library.