What color is #51FF51?

#51FF51 is a light, vivid green. In RGB it is rgb(81, 255, 81), and in HSL hsl(120, 100%, 66%).

Is #51FF51 accessible as text?

On white, #51FF51 has a contrast ratio of 1.33:1 (fails WCAG AA for body text); on black it is 15.77:1 (passes). For text placed on #51FF51, use black for the best readability.

What is the closest Tailwind color to #51FF51?

The nearest Tailwind CSS token is lime-400 (#9AE600).

What colors go well with #51FF51?

#51FF51 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #FF52FF. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #51FF51 below.

Is #51FF51 good for buttons?

#51FF51 works well for buttons and highlights, but use black text on #51FF51 — white text only reaches 1.33:1, below the 4.5:1 needed for normal-size labels.

Is #51FF51 the same as CSS lawngreen?

No — #51FF51 is not the CSS named color lawngreen, but lawngreen (#7CFC00) is the closest CSS named color.

#51FF51 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #51FF51

Not just a swatch — here's how #51FF51 works with other colors. Named schemes with #51FF51 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #51FF51 Surface #13161A Highlight #F4F6F8 Secondary #576770 Accent #8EFF8A

Neon 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 Neon Green.

Japanese Sand Base · 5 colors

Base #51FF51 Surface #EEE9DC Highlight #F5F1E7 Secondary #B7B09F Ink #2B2723

Neon 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.

Botanical Studio Lead · 5 colors

Lead #51FF51 Secondary #4C6B3B Accent #AD6B00 Surface #EEEAD6 Anchor #3C2F20

Neon 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 #51FF51 Secondary #D7FFD3 Support #989286 Ink #17140F

Neon 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 Neon Green carrying the quiet middle.

Coastal Morning Lead · 5 colors

Lead #51FF51 Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #193648

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

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Color Lab

How #51FF51 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 47/100

Neutral

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

Softness 43/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 13/100

Very low

Airy and open — recedes, leaves the composition light.

Naturalness 6/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 4/100

Very low

Clean and current — no dusty, aged cast.

Luxury 15/100

Very low

Playful and accessible rather than exclusive.

Brand distinctiveness 99/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 7/100

Very low

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

Surface fit 44/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 43/100

Moderate

Shifts noticeably in CMYK — expect it to dull on press.

Pairs with #51FF51

For UI

For branding

For interior

For fashion

People also use #51FF51 with

Mint Green Medium Spring Green 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 14.0:1. Use

Subtle surface Use #E1FAE1 for cards and hover fills. Tint 80

Avoid beside #52FF8B — 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 #51FF51 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: #51FF51;
  --color-base-rgb: 81 255 81;
  --color-base-oklch: oklch(87.9% 0.256 143.0);
  --color-50: #F0FEF0;
  --color-100: #D8FDD8;
  --color-200: #B1FCB1;
  --color-300: #77F877;
  --color-400: #46EC46;
  --color-500: #22D222;
  --color-600: #239F23;
  --color-700: #1F701F;
  --color-800: #184818;
  --color-900: #112C11;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  neon-green: {
    50: '#F0FEF0',
    100: '#D8FDD8',
    200: '#B1FCB1',
    300: '#77F877',
    400: '#46EC46',
    500: '#22D222',
    600: '#239F23',
    700: '#1F701F',
    800: '#184818',
    900: '#112C11',
  },
}

$base: #51FF51;
$base-ink: #141310;
$base-50: #F0FEF0;
$base-100: #D8FDD8;
$base-200: #B1FCB1;
$base-300: #77F877;
$base-400: #46EC46;
$base-500: #22D222;
$base-600: #239F23;
$base-700: #1F701F;
$base-800: #184818;
$base-900: #112C11;
$base-hover: #0EFF0E;
$base-subtle: #D1F9D1;

{
    "color": {
        "base": {
            "value": "#51FF51",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEF0",
                "type": "color"
            },
            "100": {
                "value": "#D8FDD8",
                "type": "color"
            },
            "200": {
                "value": "#B1FCB1",
                "type": "color"
            },
            "300": {
                "value": "#77F877",
                "type": "color"
            },
            "400": {
                "value": "#46EC46",
                "type": "color"
            },
            "500": {
                "value": "#22D222",
                "type": "color"
            },
            "600": {
                "value": "#239F23",
                "type": "color"
            },
            "700": {
                "value": "#1F701F",
                "type": "color"
            },
            "800": {
                "value": "#184818",
                "type": "color"
            },
            "900": {
                "value": "#112C11",
                "type": "color"
            }
        }
    }
}

Palettes built on #51FF51

Color Lab

Pairs with #51FF51

UI roles & guardrails

In real applications

Scales

Every model

Export