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#40C51B Color

#40C51B is rgb(64, 197, 27) in RGB, hsl(107, 76%, 44%) in HSL, and about cmyk(68%, 0%, 86%, 23%) in CMYK. It has no registered color name of its own — the closest is Lime Green (#32CD32), clearly related but distinguishable side by side at ΔE 6.02. Black text is the more readable choice on this background.

#40C51B
HEX#40C51B
RGBrgb(64, 197, 27)
HSLhsl(107, 76%, 44%)
HSVhsv(107, 86%, 77%)
CMYKcmyk(68%, 0%, 86%, 23%)
OKLCHoklch(72.3% 0.226 140.4)
LABlab(70.34% -58.09 64.13)
LCHlch(70.34% 86.53 132.17)

What #40C51B 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 #40C51B, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Lime Green#32CD32ΔE 6.02Kelly Green#4CBB17ΔE 6.49SGBUS Green#55DD33ΔE 8.53Vivid Malachite#00CC33ΔE 9.25Dark Pastel Green#03C03CΔE 13.05Malachite#0BDA51ΔE 15.76

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

#40C51B Channel Values

How #40C51B 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 197 · B 278-bit channels as sent to the display
HSLH 107° · S 76% · L 44%Easiest model for building lighter and darker variants
HSVH 107° · S 86% · V 77%Matches the picker in most design tools
CMYKC 68% · M 0% · Y 86% · K 23%Approximate ink mix; confirm with an ICC profile before printing
Luminance2.28:1 vs white · 9.22:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #40C51B 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 text2.28:1AA normal AA large AAA normal
TextBlack text9.22:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #40C51B in the contrast checker.

Colors That Go With #40C51B

Pairings derived from color-wheel relationships. The complementary color sits opposite #40C51B; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#40C51B
Complementary
#A11BC5
Analogous
#95C51B
Analogous
#1BC54B
Triadic
#1B40C5
Triadic
#C51B40
Split comp.
#4B1BC5
Split comp.
#C51B95

Tints & Shades of #40C51B

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

#50E228
#69E647
#87EB6B
#A4F08F
#C1F5B3
#DBF9D2

Shades

#37AB17
#309414
#277911
#1E5E0D
#164309
#0F2D06

Want a full 50-950 ramp with semantic roles? Generate design tokens from #40C51B.

How #40C51B 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#40C51B
Protanopia#B7B71E
Protanomaly#96BD1D
Deuteranopia#A8A82C
Deuteranomaly#8AB426
Tritanopia#62BABA
Tritanomaly#56BE94
Achromatopsia#ACACAC

Test a full palette in the color blindness simulator.

Using #40C51B in Code

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

CSS custom property--color-40c51b: #40C51B;
CSS backgroundbackground-color: #40C51B;
Tailwind configcolors: { 'color-40c51b': '#40C51B' }
SwiftUIColor(red: 0.251, green: 0.773, blue: 0.106)
Android XML<color name="color_40c51b">#40C51B</color>
SVG fillfill="#40C51B"

More Green Colors

#40C51B sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#40C51B Frequently Asked Questions

What color is #40C51B?

#40C51B is a mid-tone green — rgb(64, 197, 27) in RGB and hsl(107, 76%, 44%) in HSL. It carries no registered color name of its own; the closest named color is Lime Green (#32CD32), which is clearly related but distinguishable side by side at a CIE76 distance of 6.02.

What is the RGB value of #40C51B?

#40C51B is rgb(64, 197, 27) — red 64, green 197, and blue 27 on the 0-255 scale.

What is the CMYK value of #40C51B?

#40C51B converts to approximately cmyk(68%, 0%, 86%, 23%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #40C51B be black or white?

Black text is the more readable choice. #40C51B scores 2.28:1 against white and 9.22:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #40C51B as a CSS color keyword?

No. #40C51B 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 6.02, which is clearly related but distinguishable side by side.

Open #40C51B 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.