What color is #66DF2A?

#66DF2A is a medium, vivid green. In RGB it is rgb(102, 223, 42), and in HSL hsl(100, 74%, 52%).

Is #66DF2A accessible as text?

On white, #66DF2A has a contrast ratio of 1.73:1 (fails WCAG AA for body text); on black it is 12.15:1 (passes). For text placed on #66DF2A, use black for the best readability.

What is the closest Tailwind color to #66DF2A?

The nearest Tailwind CSS token is lime-500 (#7CCF00).

What colors go well with #66DF2A?

#66DF2A pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #A32ADF. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #66DF2A below.

Is #66DF2A good for buttons?

#66DF2A works well for buttons and highlights, but use black text on #66DF2A — white text only reaches 1.73:1, below the 4.5:1 needed for normal-size labels.

Is #66DF2A the same as CSS limegreen?

No — #66DF2A is not the CSS named color limegreen, but limegreen (#32CD32) is the closest CSS named color.

#66DF2A Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #66DF2A

Not just a swatch — here's how #66DF2A works with other colors. Named schemes with #66DF2A in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #66DF2A Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #9AFF71

Malachite is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Malachite.

Japanese Sand Base · 5 colors

Base #66DF2A Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

Malachite sets a calm, sun-bleached base here, wrapped in bone and paper off-whites and a soft greige, with a single ink accent for wabi-sabi restraint.

Botanical Studio Lead · 5 colors

Lead #66DF2A Secondary #4D6B3B Accent #AE6B00 Surface #EFEAD6 Anchor #3D2F21

Malachite leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #66DF2A Secondary #D2FAC5 Support #989286 Ink #17140F

Malachite is the single accent in this high-contrast editorial system — set on near-white paper against near-black ink, with a warm grey and a desaturated tint of Malachite carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #66DF2A Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #193648

Malachite opens this coastal palette with sea-glass and warm sand alongside it, grounded by driftwood grey and a deep-navy anchor.

Build a working theme in the generator →

Color Lab

How #66DF2A actually behaves in design work — read from its OKLCH lightness, chroma and hue, not just its raw numbers. Ten signals to help you decide where this color earns its place.

Warmth 52/100

Neutral

Balanced temperature — flexible, sits between warm and cool schemes.

Softness 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 22/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 14/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 11/100

Very low

Clean and current — no dusty, aged cast.

Luxury 23/100

Low

Playful and accessible rather than exclusive.

Brand distinctiveness 90/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 20/100

Very low

Weak as an action color — too pale, too dark or too muted to signal.

Surface fit 36/100

Low

Usable as a tinted surface in measured doses.

Print safety 48/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #66DF2A

For UI

For branding

For interior

For fashion

People also use #66DF2A with

Pear Malachite Dark Orchid Platinum Army Green

UI roles & guardrails

Primary action Safe as a filled button with near-black label. AAA

Body text Do not use for body copy on light surfaces. Avoid

Large display Only on dark surfaces. Avoid

Background Pair with #141310 text at 10.8:1. Use

Subtle surface Use #E2F4D9 for cards and hover fills. Tint 80

Avoid beside #2ADF2A — the hue gap is too small to read as intentional. Clash

In real applications

Not a swatch to memorise — a color to build with. Here is #66DF2A at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

Dashboard

Revenue

$48.2k ▲ 12%

Brand

AVELINE

Studio

Poster

Nov 14 · 8PM

NIGHT
MARKET

Packaging

BLOOM

Botanical Wash

250 ml

Interior

Every model

Export

:root {
  --color-base: #66DF2A;
  --color-base-rgb: 102 223 42;
  --color-base-oklch: oklch(80.2% 0.233 138.0);
  --color-50: #F5FEF1;
  --color-100: #E5FBDB;
  --color-200: #CCF4B8;
  --color-300: #A8E788;
  --color-400: #85D65C;
  --color-500: #65BC39;
  --color-600: #528F33;
  --color-700: #3D652A;
  --color-800: #2B421F;
  --color-900: #1B2915;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  malachite: {
    50: '#F5FEF1',
    100: '#E5FBDB',
    200: '#CCF4B8',
    300: '#A8E788',
    400: '#85D65C',
    500: '#65BC39',
    600: '#528F33',
    700: '#3D652A',
    800: '#2B421F',
    900: '#1B2915',
  },
}

$base: #66DF2A;
$base-ink: #141310;
$base-50: #F5FEF1;
$base-100: #E5FBDB;
$base-200: #CCF4B8;
$base-300: #A8E788;
$base-400: #85D65C;
$base-500: #65BC39;
$base-600: #528F33;
$base-700: #3D652A;
$base-800: #2B421F;
$base-900: #1B2915;
$base-hover: #50B91C;
$base-subtle: #D3EFC6;

{
    "color": {
        "base": {
            "value": "#66DF2A",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5FEF1",
                "type": "color"
            },
            "100": {
                "value": "#E5FBDB",
                "type": "color"
            },
            "200": {
                "value": "#CCF4B8",
                "type": "color"
            },
            "300": {
                "value": "#A8E788",
                "type": "color"
            },
            "400": {
                "value": "#85D65C",
                "type": "color"
            },
            "500": {
                "value": "#65BC39",
                "type": "color"
            },
            "600": {
                "value": "#528F33",
                "type": "color"
            },
            "700": {
                "value": "#3D652A",
                "type": "color"
            },
            "800": {
                "value": "#2B421F",
                "type": "color"
            },
            "900": {
                "value": "#1B2915",
                "type": "color"
            }
        }
    }
}

Palettes built on #66DF2A

Color Lab

Pairs with #66DF2A

UI roles & guardrails

In real applications

Scales

Every model

Export