What color is #66F58E?

#66F58E is a light, vivid green. In RGB it is rgb(102, 245, 142), and in HSL hsl(137, 88%, 68%).

Is #66F58E accessible as text?

On white, #66F58E has a contrast ratio of 1.40:1 (fails WCAG AA for body text); on black it is 15.02:1 (passes). For text placed on #66F58E, use black for the best readability.

What is the closest Tailwind color to #66F58E?

The nearest Tailwind CSS token is green-300 (#7BF1A8).

What colors go well with #66F58E?

#66F58E pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #F566CD. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #66F58E below.

Is #66F58E good for buttons?

#66F58E works well for buttons and highlights, but use black text on #66F58E — white text only reaches 1.40:1, below the 4.5:1 needed for normal-size labels.

Is #66F58E the same as CSS mediumspringgreen?

No — #66F58E is not the CSS named color mediumspringgreen, but mediumspringgreen (#00FA9A) is the closest CSS named color.

#66F58E Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #66F58E

Not just a swatch — here's how #66F58E works with other colors. Named schemes with #66F58E in its natural role, and a note on why the supporting colors balance it.

Nordic Calm Accent · 5 colors

Accent #66F58E Secondary #ADB4B7 Surface #F1F2F0 Support #7895A3 Anchor #2D3236

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

Tech Product Signal · 5 colors

Signal #66F58E Surface #13161A Highlight #F4F6F8 Secondary #586770 Accent #9FFFBC

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

Botanical Studio Lead · 5 colors

Lead #66F58E Secondary #4B6C3C Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

Medium Spring Green 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 #66F58E Secondary #DCFFE3 Support #989286 Ink #17140F

Medium Spring 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 Medium Spring Green carrying the quiet middle.

Japanese Sand Base · 5 colors

Base #66F58E Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F Ink #2B2723

Medium Spring Green 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.

Build a working theme in the generator →

Color Lab

How #66F58E 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 41/100

Neutral

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

Softness 54/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 14/100

Very low

Airy and open — recedes, leaves the composition light.

Naturalness 44/100

Moderate

Loosely natural — an earthy edge without being rustic.

Vintage feel 19/100

Very low

Clean and current — no dusty, aged cast.

Luxury 18/100

Very low

Playful and accessible rather than exclusive.

Brand distinctiveness 73/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 13/100

Very low

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

Surface fit 42/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 59/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #66F58E

For UI

For branding

For interior

For fashion

People also use #66F58E with

Mint Green 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 13.3:1. Use

Subtle surface Use #E4F9EA for cards and hover fills. Tint 80

Avoid beside #66F5BE — 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 #66F58E at work across the surfaces designers actually ship.

Website / UI

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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: #66F58E;
  --color-base-rgb: 102 245 142;
  --color-base-oklch: oklch(86.8% 0.188 149.9);
  --color-50: #F0FEF4;
  --color-100: #D8FDE2;
  --color-200: #B2FAC7;
  --color-300: #7FF09F;
  --color-400: #50E279;
  --color-500: #2DC859;
  --color-600: #2A9849;
  --color-700: #246B38;
  --color-800: #1B4627;
  --color-900: #132B19;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  medium-spring-green: {
    50: '#F0FEF4',
    100: '#D8FDE2',
    200: '#B2FAC7',
    300: '#7FF09F',
    400: '#50E279',
    500: '#2DC859',
    600: '#2A9849',
    700: '#246B38',
    800: '#1B4627',
    900: '#132B19',
  },
}

$base: #66F58E;
$base-ink: #141310;
$base-50: #F0FEF4;
$base-100: #D8FDE2;
$base-200: #B2FAC7;
$base-300: #7FF09F;
$base-400: #50E279;
$base-500: #2DC859;
$base-600: #2A9849;
$base-700: #246B38;
$base-800: #1B4627;
$base-900: #132B19;
$base-hover: #24F15E;
$base-subtle: #D6F7DF;

{
    "color": {
        "base": {
            "value": "#66F58E",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEF4",
                "type": "color"
            },
            "100": {
                "value": "#D8FDE2",
                "type": "color"
            },
            "200": {
                "value": "#B2FAC7",
                "type": "color"
            },
            "300": {
                "value": "#7FF09F",
                "type": "color"
            },
            "400": {
                "value": "#50E279",
                "type": "color"
            },
            "500": {
                "value": "#2DC859",
                "type": "color"
            },
            "600": {
                "value": "#2A9849",
                "type": "color"
            },
            "700": {
                "value": "#246B38",
                "type": "color"
            },
            "800": {
                "value": "#1B4627",
                "type": "color"
            },
            "900": {
                "value": "#132B19",
                "type": "color"
            }
        }
    }
}

Palettes built on #66F58E

Color Lab

Pairs with #66F58E

UI roles & guardrails

In real applications

Scales

Every model

Export