What color is #66CF60?

#66CF60 is a medium green. In RGB it is rgb(102, 207, 96), and in HSL hsl(117, 54%, 59%).

Is #66CF60 accessible as text?

On white, #66CF60 has a contrast ratio of 1.97:1 (fails WCAG AA for body text); on black it is 10.66:1 (passes). For text placed on #66CF60, use black for the best readability.

What is the closest Tailwind color to #66CF60?

The nearest Tailwind CSS token is green-400 (#05DF72).

What colors go well with #66CF60?

#66CF60 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C95ECF. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #66CF60 below.

Is #66CF60 good for buttons?

#66CF60 works well for buttons and highlights, but use black text on #66CF60 — white text only reaches 1.97:1, below the 4.5:1 needed for normal-size labels.

Is #66CF60 the same as CSS yellowgreen?

No — #66CF60 is not the CSS named color yellowgreen, but yellowgreen (#9ACD32) is the closest CSS named color.

#66CF60 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #66CF60

Not just a swatch — here's how #66CF60 works with other colors. Named schemes with #66CF60 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #66CF60 Secondary #4D6B3B Accent #AD6B00 Surface #EEEAD6 Anchor #3C2F21

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

Coastal Morning Lead · 5 colors

Lead #66CF60 Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #193648

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

Japanese Sand Base · 5 colors

Base #66CF60 Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

Shamrock 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.

Warm Autumn Interior Dominant · 5 colors

Dominant #66CF60 Secondary #AD6B00 Accent #687C4C Surface #F2EDDD Anchor #3A2B1E

This palette keeps Shamrock as the dominant warm neutral, balanced by muted terracotta and olive earth tones and grounded by a deep espresso anchor.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #66CF60 Secondary #C9ECC6 Support #989286 Ink #17140F

Shamrock 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 Shamrock carrying the quiet middle.

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Color Lab

How #66CF60 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 48/100

Neutral

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

Softness 50/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 25/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 59/100

Moderate

Organic, earthy character — at home in wellness, food and craft brands.

Vintage feel 27/100

Low

A faint retro warmth without tipping into sepia.

Luxury 29/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 69/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 36/100

Low

Workable accent with care around contrast.

Surface fit 33/100

Low

Usable as a tinted surface in measured doses.

Print safety 60/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #66CF60

For UI

For branding

For interior

For fashion

People also use #66CF60 with

Celadon Medium Aquamarine Medium Orchid Platinum Hunter 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 9.4:1. Use

Subtle surface Use #E3F2E2 for cards and hover fills. Tint 80

Avoid beside #5ECF7E — 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 #66CF60 at work across the surfaces designers actually ship.

Website / UI

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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: #66CF60;
  --color-base-rgb: 102 207 96;
  --color-base-oklch: oklch(76.7% 0.179 142.6);
  --color-50: #F3FCF3;
  --color-100: #E0F6DF;
  --color-200: #C2ECC0;
  --color-300: #98DA95;
  --color-400: #71C66C;
  --color-500: #50AA4B;
  --color-600: #43833F;
  --color-700: #345D32;
  --color-800: #253D23;
  --color-900: #182617;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  shamrock: {
    50: '#F3FCF3',
    100: '#E0F6DF',
    200: '#C2ECC0',
    300: '#98DA95',
    400: '#71C66C',
    500: '#50AA4B',
    600: '#43833F',
    700: '#345D32',
    800: '#253D23',
    900: '#182617',
  },
}

$base: #66CF60;
$base-ink: #141310;
$base-50: #F3FCF3;
$base-100: #E0F6DF;
$base-200: #C2ECC0;
$base-300: #98DA95;
$base-400: #71C66C;
$base-500: #50AA4B;
$base-600: #43833F;
$base-700: #345D32;
$base-800: #253D23;
$base-900: #182617;
$base-hover: #3EB937;
$base-subtle: #D4EDD3;

{
    "color": {
        "base": {
            "value": "#66CF60",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FCF3",
                "type": "color"
            },
            "100": {
                "value": "#E0F6DF",
                "type": "color"
            },
            "200": {
                "value": "#C2ECC0",
                "type": "color"
            },
            "300": {
                "value": "#98DA95",
                "type": "color"
            },
            "400": {
                "value": "#71C66C",
                "type": "color"
            },
            "500": {
                "value": "#50AA4B",
                "type": "color"
            },
            "600": {
                "value": "#43833F",
                "type": "color"
            },
            "700": {
                "value": "#345D32",
                "type": "color"
            },
            "800": {
                "value": "#253D23",
                "type": "color"
            },
            "900": {
                "value": "#182617",
                "type": "color"
            }
        }
    }
}