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#428F4B Color

#428F4B is rgb(66, 143, 75) in RGB, hsl(127, 37%, 41%) in HSL, and about cmyk(54%, 0%, 48%, 44%) in CMYK. It has no registered color name of its own — the closest is May Green (#4C9141), clearly related but distinguishable side by side at ΔE 6.52. Black text is the more readable choice on this background.

#428F4B
HEX#428F4B
RGBrgb(66, 143, 75)
HSLhsl(127, 37%, 41%)
HSVhsv(127, 54%, 56%)
CMYKcmyk(54%, 0%, 48%, 44%)
OKLCHoklch(58.4% 0.127 146.1)
LABlab(53.31% -36.19 28.52)
LCHlch(53.31% 46.08 141.76)

What #428F4B 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 #428F4B, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

May Green#4C9141ΔE 6.52Middle Green#4D8C57ΔE 9Sea Foam Green#2E8B57ΔE 9.28Philippine Green#008543ΔE 9.61Neon Dark Green#008443ΔE 9.64Spanish Green#009150ΔE 10.67

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

#428F4B Channel Values

How #428F4B 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 66 · G 143 · B 758-bit channels as sent to the display
HSLH 127° · S 37% · L 41%Easiest model for building lighter and darker variants
HSVH 127° · S 54% · V 56%Matches the picker in most design tools
CMYKC 54% · M 0% · Y 48% · K 44%Approximate ink mix; confirm with an ICC profile before printing
Luminance3.99:1 vs white · 5.26:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #428F4B 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 text3.99:1AA normal AA large AAA normal
TextBlack text5.26:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #428F4B in the contrast checker.

Colors That Go With #428F4B

Pairings derived from color-wheel relationships. The complementary color sits opposite #428F4B; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#428F4B
Complementary
#8F4286
Analogous
#608F42
Analogous
#428F72
Triadic
#4B428F
Triadic
#8F4B42
Split comp.
#72428F
Split comp.
#8F4260

Tints & Shades of #428F4B

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

#4FAB5A
#69BA72
#85C78C
#A4D5AA
#C0E2C4
#DCEFDE

Shades

#3A7E42
#306937
#28572E
#204625
#18341B
#0E1F10

Want a full 50-950 ramp with semantic roles? Generate design tokens from #428F4B.

How #428F4B 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#428F4B
Protanopia#86864C
Protanomaly#71894B
Deuteranopia#7C7C4E
Deuteranomaly#6A844D
Tritanopia#508989
Tritanomaly#4B8B75
Achromatopsia#7F7F7F

Test a full palette in the color blindness simulator.

Using #428F4B in Code

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

CSS custom property--color-428f4b: #428F4B;
CSS backgroundbackground-color: #428F4B;
Tailwind configcolors: { 'color-428f4b': '#428F4B' }
SwiftUIColor(red: 0.259, green: 0.561, blue: 0.294)
Android XML<color name="color_428f4b">#428F4B</color>
SVG fillfill="#428F4B"

More Green Colors

#428F4B sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200fdfff5001f00f7fee7002400f7fbf5002c22f5fffa002e00f5fff5003300f0fff000800000db870d542b20483f33cc6646c3995ea50072863991e0b7a3f5d8bcd7bcd1ffed

#428F4B Frequently Asked Questions

What color is #428F4B?

#428F4B is a mid-tone green — rgb(66, 143, 75) in RGB and hsl(127, 37%, 41%) in HSL. It carries no registered color name of its own; the closest named color is May Green (#4C9141), which is clearly related but distinguishable side by side at a CIE76 distance of 6.52.

What is the RGB value of #428F4B?

#428F4B is rgb(66, 143, 75) — red 66, green 143, and blue 75 on the 0-255 scale.

What is the CMYK value of #428F4B?

#428F4B converts to approximately cmyk(54%, 0%, 48%, 44%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #428F4B be black or white?

Black text is the more readable choice. #428F4B scores 3.99:1 against white and 5.26:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #428F4B as a CSS color keyword?

No. #428F4B 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 seagreen (#2E8B57) at a CIE76 distance of 9.28, which is clearly related but distinguishable side by side.

Open #428F4B 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.