What color is #66BC56?

#66BC56 is a medium green. In RGB it is rgb(102, 188, 86), and in HSL hsl(111, 43%, 54%).

Is #66BC56 accessible as text?

On white, #66BC56 has a contrast ratio of 2.36:1 (fails WCAG AA for body text); on black it is 8.89:1 (passes). For text placed on #66BC56, use black for the best readability.

What is the closest Tailwind color to #66BC56?

The nearest Tailwind CSS token is green-500 (#00C950).

What colors go well with #66BC56?

#66BC56 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #AD57BC. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #66BC56 below.

Is #66BC56 good for buttons?

#66BC56 works well for buttons and highlights, but use black text on #66BC56 — white text only reaches 2.36:1, below the 4.5:1 needed for normal-size labels.

Is #66BC56 the same as CSS mediumseagreen?

No — #66BC56 is not the CSS named color mediumseagreen, but mediumseagreen (#3CB371) is the closest CSS named color.

#66BC56 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #66BC56

Not just a swatch — here's how #66BC56 works with other colors. Named schemes with #66BC56 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #66BC56 Secondary #4D6B3B Accent #AE6B00 Surface #EFEAD6 Anchor #3C2F21

Mantis 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 #66BC56 Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #193648

Mantis 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 #66BC56 Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

Mantis 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 #66BC56 Secondary #AE6B00 Accent #697C4C Surface #F2EDDD Anchor #3A2B1E

This palette keeps Mantis 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 #66BC56 Secondary #BDDAB7 Support #989286 Ink #17140F

Mantis 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 Mantis carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #66BC56 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 50/100

Neutral

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

Softness 50/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 29/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 80/100

High

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

Vintage feel 36/100

Low

A faint retro warmth without tipping into sepia.

Luxury 34/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 63/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 53/100

Moderate

Workable accent with care around contrast.

Surface fit 28/100

Low

Too saturated or mid-toned for big areas — keep it to accents.

Print safety 64/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #66BC56

For UI

For branding

For interior

For fashion

People also use #66BC56 with

Pistachio Medium Sea Green 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 7.9:1. Use

Subtle surface Use #E2EFE0 for cards and hover fills. Tint 80

Avoid beside #57BC6A — 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 #66BC56 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: #66BC56;
  --color-base-rgb: 102 188 86;
  --color-base-oklch: oklch(71.8% 0.162 140.6);
  --color-50: #F5FBF4;
  --color-100: #E4F4E1;
  --color-200: #CAE8C5;
  --color-300: #A4D39C;
  --color-400: #80BD75;
  --color-500: #60A055;
  --color-600: #4E7C46;
  --color-700: #3B5936;
  --color-800: #293B26;
  --color-900: #1B2419;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  mantis: {
    50: '#F5FBF4',
    100: '#E4F4E1',
    200: '#CAE8C5',
    300: '#A4D39C',
    400: '#80BD75',
    500: '#60A055',
    600: '#4E7C46',
    700: '#3B5936',
    800: '#293B26',
    900: '#1B2419',
  },
}

$base: #66BC56;
$base-ink: #141310;
$base-50: #F5FBF4;
$base-100: #E4F4E1;
$base-200: #CAE8C5;
$base-300: #A4D39C;
$base-400: #80BD75;
$base-500: #60A055;
$base-600: #4E7C46;
$base-700: #3B5936;
$base-800: #293B26;
$base-900: #1B2419;
$base-hover: #4D9E3F;
$base-subtle: #D4E7D0;

{
    "color": {
        "base": {
            "value": "#66BC56",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F5FBF4",
                "type": "color"
            },
            "100": {
                "value": "#E4F4E1",
                "type": "color"
            },
            "200": {
                "value": "#CAE8C5",
                "type": "color"
            },
            "300": {
                "value": "#A4D39C",
                "type": "color"
            },
            "400": {
                "value": "#80BD75",
                "type": "color"
            },
            "500": {
                "value": "#60A055",
                "type": "color"
            },
            "600": {
                "value": "#4E7C46",
                "type": "color"
            },
            "700": {
                "value": "#3B5936",
                "type": "color"
            },
            "800": {
                "value": "#293B26",
                "type": "color"
            },
            "900": {
                "value": "#1B2419",
                "type": "color"
            }
        }
    }
}

Palettes built on #66BC56

Color Lab

Pairs with #66BC56

UI roles & guardrails

In real applications

Scales

Every model

Export