What color is #40E271?

#40E271 is a medium, vivid green. In RGB it is rgb(64, 226, 113), and in HSL hsl(138, 74%, 57%).

Is #40E271 accessible as text?

On white, #40E271 has a contrast ratio of 1.70:1 (fails WCAG AA for body text); on black it is 12.33:1 (passes). For text placed on #40E271, use black for the best readability.

What is the closest Tailwind color to #40E271?

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

What colors go well with #40E271?

#40E271 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #E240B2. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #40E271 below.

Is #40E271 good for buttons?

#40E271 works well for buttons and highlights, but use black text on #40E271 — white text only reaches 1.70:1, below the 4.5:1 needed for normal-size labels.

Is #40E271 the same as CSS mediumspringgreen?

No — #40E271 is not the CSS named color mediumspringgreen, but mediumspringgreen (#00FA9A) is the closest CSS named color.

#40E271 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #40E271

Not just a swatch — here's how #40E271 works with other colors. Named schemes with #40E271 in its natural role, and a note on why the supporting colors balance it.

Nordic Calm Accent · 5 colors

Accent #40E271 Secondary #ADB4B7 Surface #F1F2F0 Support #7895A3 Anchor #2D3236

Malachite 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 #40E271 Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #83FFA1

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.

Botanical Studio Lead · 5 colors

Lead #40E271 Secondary #4B6C3C Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

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 #40E271 Secondary #CDFBD3 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.

Japanese Sand Base · 5 colors

Base #40E271 Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F 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.

Build a working theme in the generator →

Color Lab

How #40E271 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 42/100

Neutral

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

Softness 48/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 21/100

Low

Airy and open — recedes, leaves the composition light.

Naturalness 31/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 18/100

Very low

Clean and current — no dusty, aged cast.

Luxury 24/100

Low

Playful and accessible rather than exclusive.

Brand distinctiveness 79/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 23/100

Low

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

Surface fit 37/100

Low

Usable as a tinted surface in measured doses.

Print safety 56/100

Moderate

Prints close, with a slight loss of vibrancy.

Pairs with #40E271

For UI

For branding

For interior

For fashion

People also use #40E271 with

Light Green Turquoise Fuchsia 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 10.9:1. Use

Subtle surface Use #DDF5E4 for cards and hover fills. Tint 80

Avoid beside #40E2A7 — 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 #40E271 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: #40E271;
  --color-base-rgb: 64 226 113;
  --color-base-oklch: oklch(80.6% 0.204 149.0);
  --color-50: #F1FEF5;
  --color-100: #DBFBE4;
  --color-200: #B8F4CA;
  --color-300: #88E7A4;
  --color-400: #5CD680;
  --color-500: #39BC60;
  --color-600: #338F4E;
  --color-700: #2A653B;
  --color-800: #1F4229;
  --color-900: #15291B;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  malachite: {
    50: '#F1FEF5',
    100: '#DBFBE4',
    200: '#B8F4CA',
    300: '#88E7A4',
    400: '#5CD680',
    500: '#39BC60',
    600: '#338F4E',
    700: '#2A653B',
    800: '#1F4229',
    900: '#15291B',
  },
}

$base: #40E271;
$base-ink: #141310;
$base-50: #F1FEF5;
$base-100: #DBFBE4;
$base-200: #B8F4CA;
$base-300: #88E7A4;
$base-400: #5CD680;
$base-500: #39BC60;
$base-600: #338F4E;
$base-700: #2A653B;
$base-800: #1F4229;
$base-900: #15291B;
$base-hover: #1ECA52;
$base-subtle: #CCF1D7;

{
    "color": {
        "base": {
            "value": "#40E271",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1FEF5",
                "type": "color"
            },
            "100": {
                "value": "#DBFBE4",
                "type": "color"
            },
            "200": {
                "value": "#B8F4CA",
                "type": "color"
            },
            "300": {
                "value": "#88E7A4",
                "type": "color"
            },
            "400": {
                "value": "#5CD680",
                "type": "color"
            },
            "500": {
                "value": "#39BC60",
                "type": "color"
            },
            "600": {
                "value": "#338F4E",
                "type": "color"
            },
            "700": {
                "value": "#2A653B",
                "type": "color"
            },
            "800": {
                "value": "#1F4229",
                "type": "color"
            },
            "900": {
                "value": "#15291B",
                "type": "color"
            }
        }
    }
}