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#40B580 Color

#40B580 is rgb(64, 181, 128) in RGB, hsl(153, 48%, 48%) in HSL, and about cmyk(65%, 0%, 29%, 29%) in CMYK. It has no registered color name of its own — the closest is Green (Crayola) (#1CAC78), clearly related but distinguishable side by side at ΔE 5.02. Black text is the more readable choice on this background.

#40B580
HEX#40B580
RGBrgb(64, 181, 128)
HSLhsl(153, 48%, 48%)
HSVhsv(153, 65%, 71%)
CMYKcmyk(65%, 0%, 29%, 29%)
OKLCHoklch(69.4% 0.131 160.1)
LABlab(66.19% -43.66 17.07)
LCHlch(66.19% 46.88 158.64)

What #40B580 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 #40B580, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Green (Crayola)#1CAC78ΔE 5.02Mountain Meadow#30BA8FΔE 6.56Green (Munsell)#00A877ΔE 6.9Medium Sea Green#3CB371ΔE 7.1Green Frog#00A86BΔE 8.78Green (NCS)#009F6BΔE 8.86

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

#40B580 Channel Values

How #40B580 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 181 · B 1288-bit channels as sent to the display
HSLH 153° · S 48% · L 48%Easiest model for building lighter and darker variants
HSVH 153° · S 65% · V 71%Matches the picker in most design tools
CMYKC 65% · M 0% · Y 29% · K 29%Approximate ink mix; confirm with an ICC profile before printing
Luminance2.58:1 vs white · 8.14:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #40B580 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 text2.58:1AA normal AA large AAA normal
TextBlack text8.14:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #40B580 in the contrast checker.

Colors That Go With #40B580

Pairings derived from color-wheel relationships. The complementary color sits opposite #40B580; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#40B580
Complementary
#B54075
Analogous
#40B546
Analogous
#40AFB5
Triadic
#8040B5
Triadic
#B58040
Split comp.
#B540AF
Split comp.
#B54640

Tints & Shades of #40B580

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

#55C392
#70CDA3
#8AD6B4
#A8E1C7
#C3EAD8
#DDF3E9

Shades

#389F70
#2E845E
#266D4D
#1E573D
#17402D
#0D261B

Want a full 50-950 ramp with semantic roles? Generate design tokens from #40B580.

How #40B580 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#40B580
Protanopia#A8A881
Protanomaly#8AAD80
Deuteranopia#9B9B83
Deuteranomaly#80A682
Tritanopia#51AFAF
Tritanomaly#4BB29F
Achromatopsia#A1A1A1

Test a full palette in the color blindness simulator.

Using #40B580 in Code

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

CSS custom property--color-40b580: #40B580;
CSS backgroundbackground-color: #40B580;
Tailwind configcolors: { 'color-40b580': '#40B580' }
SwiftUIColor(red: 0.251, green: 0.710, blue: 0.502)
Android XML<color name="color_40b580">#40B580</color>
SVG fillfill="#40B580"

More Green Colors

#40B580 sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#40B580 Frequently Asked Questions

What color is #40B580?

#40B580 is a mid-tone green — rgb(64, 181, 128) in RGB and hsl(153, 48%, 48%) in HSL. It carries no registered color name of its own; the closest named color is Green (Crayola) (#1CAC78), which is clearly related but distinguishable side by side at a CIE76 distance of 5.02.

What is the RGB value of #40B580?

#40B580 is rgb(64, 181, 128) — red 64, green 181, and blue 128 on the 0-255 scale.

What is the CMYK value of #40B580?

#40B580 converts to approximately cmyk(65%, 0%, 29%, 29%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #40B580 be black or white?

Black text is the more readable choice. #40B580 scores 2.58:1 against white and 8.14:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #40B580 as a CSS color keyword?

No. #40B580 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 mediumseagreen (#3CB371) at a CIE76 distance of 7.1, which is clearly related but distinguishable side by side.

Open #40B580 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.