What color is #66D677?

#66D677 is a light, soft green. In RGB it is rgb(102, 214, 119), and in HSL hsl(129, 58%, 62%).

Is #66D677 accessible as text?

On white, #66D677 has a contrast ratio of 1.83:1 (fails WCAG AA for body text); on black it is 11.45:1 (passes). For text placed on #66D677, use black for the best readability.

What is the closest Tailwind color to #66D677?

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

What colors go well with #66D677?

#66D677 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #D666C5. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #66D677 below.

Is #66D677 good for buttons?

#66D677 works well for buttons and highlights, but use black text on #66D677 — white text only reaches 1.83:1, below the 4.5:1 needed for normal-size labels.

Is #66D677 the same as CSS yellowgreen?

No — #66D677 is not the CSS named color yellowgreen, but yellowgreen (#9ACD32) is the closest CSS named color.

#66D677 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #66D677

Not just a swatch — here's how #66D677 works with other colors. Named schemes with #66D677 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #66D677 Secondary #4C6B3C Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

Emerald Green 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 #66D677 Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #1A3648

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

Nordic Calm Accent · 5 colors

Accent #66D677 Secondary #ADB4B7 Surface #F1F2F0 Support #7895A3 Anchor #2D3236

Emerald Green keeps this Nordic scheme quiet — cool greys and a soft white around it, a muted-blue support and a charcoal anchor.

Warm Autumn Interior Dominant · 5 colors

Dominant #66D677 Secondary #AD6C00 Accent #687C4C Surface #F2EDDD Anchor #3A2B1E

This palette keeps Emerald Green 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 #66D677 Secondary #CEF2D1 Support #989286 Ink #17140F

Emerald Green 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 Emerald Green carrying the quiet middle.

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Color Lab

How #66D677 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 44/100

Neutral

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

Softness 53/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 22/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 69/100

High

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

Vintage feel 29/100

Low

A faint retro warmth without tipping into sepia.

Luxury 27/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 65/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 31/100

Low

Workable accent with care around contrast.

Surface fit 35/100

Low

Usable as a tinted surface in measured doses.

Print safety 63/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #66D677

For UI

For branding

For interior

For fashion

People also use #66D677 with

Light Green Medium Aquamarine 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 10.1:1. Use

Subtle surface Use #E4F4E6 for cards and hover fills. Tint 80

Avoid beside #66D69C — 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 #66D677 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: #66D677;
  --color-base-rgb: 102 214 119;
  --color-base-oklch: oklch(78.8% 0.168 146.9);
  --color-50: #F2FCF4;
  --color-100: #DEF7E2;
  --color-200: #BFEEC6;
  --color-300: #92DD9D;
  --color-400: #69C977;
  --color-500: #47AD57;
  --color-600: #3D8548;
  --color-700: #305F37;
  --color-800: #233E27;
  --color-900: #172619;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  emerald-green: {
    50: '#F2FCF4',
    100: '#DEF7E2',
    200: '#BFEEC6',
    300: '#92DD9D',
    400: '#69C977',
    500: '#47AD57',
    600: '#3D8548',
    700: '#305F37',
    800: '#233E27',
    900: '#172619',
  },
}

$base: #66D677;
$base-ink: #141310;
$base-50: #F2FCF4;
$base-100: #DEF7E2;
$base-200: #BFEEC6;
$base-300: #92DD9D;
$base-400: #69C977;
$base-500: #47AD57;
$base-600: #3D8548;
$base-700: #305F37;
$base-800: #233E27;
$base-900: #172619;
$base-hover: #35C84B;
$base-subtle: #D5EFD9;

{
    "color": {
        "base": {
            "value": "#66D677",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2FCF4",
                "type": "color"
            },
            "100": {
                "value": "#DEF7E2",
                "type": "color"
            },
            "200": {
                "value": "#BFEEC6",
                "type": "color"
            },
            "300": {
                "value": "#92DD9D",
                "type": "color"
            },
            "400": {
                "value": "#69C977",
                "type": "color"
            },
            "500": {
                "value": "#47AD57",
                "type": "color"
            },
            "600": {
                "value": "#3D8548",
                "type": "color"
            },
            "700": {
                "value": "#305F37",
                "type": "color"
            },
            "800": {
                "value": "#233E27",
                "type": "color"
            },
            "900": {
                "value": "#172619",
                "type": "color"
            }
        }
    }
}

Palettes built on #66D677

Color Lab

Pairs with #66D677

UI roles & guardrails

In real applications

Scales

Every model

Export