Palettes / Colors / #66C021

#66C021 — Green

#66C021 is a green color we call Green, closest to the named color OliveDrab (#6B8E23). It belongs to the green family.

Color name

Closest CSS keyword: olivedrab (#6B8E23) — not an exact match. CSS olivedrab gives you #6B8E23, a different color; use #66C021 when you need this exact shade.

Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.

#66C021 is a warm-leaning green color associated with growth, calm and balance. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.

Its strongest partner is its complement #7B21C0; it also sits naturally between #B5C021 and #21C02B. In the palettes below you can see it working alongside real color combinations from our collection.

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Color values

RGB & CMYK percentages

Red 40% · Green 75% · Blue 13%

Cyan 47% · Magenta 0% · Yellow 83% · Key 25%

CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.

Previews

CSS code for #66C021

.text { color: #66C021; }
.background { background-color: #66C021; }
.border { border: 3px solid #66C021; }
.text-rgb { color: rgb(102, 192, 33); }
.text-hsl { color: hsl(94, 71%, 44%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #66C021; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(102, 192, 33, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #66C021; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(102, 192, 33, 0.8); }

HTML: <p style="color:#66C021">Text here</p> · <div style="background-color:#66C021">Div content here</div>

Shades of #66C021

Tints of #66C021

Tones of #66C021

Color harmonies

Complementary — #7B21C0:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #66C021: #000000.

Semi-transparent (opacity) text on #66C021

Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:

How #66C021 looks with color blindness

Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:

Closest design-system colors

The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:

Palettes with a similar color

These palettes use a close neighbour of #66C021 rather than the exact color:

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #66C020  ·  #66C022 →

Frequently asked questions

What color is #66C021?

#66C021 is Green, a green color (RGB 102, 192, 33). Its closest standard named color is OliveDrab.

What is the RGB and HSL of #66C021?

#66C021 is RGB 102, 192, 33 — HSL 94°, 71%, 44% — CMYK 47%, 0%, 83%, 25%.

What colors go with #66C021?

Its complement is #7B21C0; analogous partners are #B5C021 and #21C02B. It also appears in 6+ palettes in our collection.

Can I use #66C021 for text?

Black text on #66C021 has a contrast ratio of 9.13:1 (passes WCAG AA); white text gives 2.30:1.