What color is #3FB551?

#3FB551 is a medium green. In RGB it is rgb(63, 181, 81), and in HSL hsl(129, 48%, 48%).

Is #3FB551 accessible as text?

On white, #3FB551 has a contrast ratio of 2.64:1 (fails WCAG AA for body text); on black it is 7.94:1 (passes). For text placed on #3FB551, use black for the best readability.

What is the closest Tailwind color to #3FB551?

The nearest Tailwind CSS token is emerald-500 (#00BC7D).

What colors go well with #3FB551?

#3FB551 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #B540A4. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3FB551 below.

Is #3FB551 good for buttons?

#3FB551 works well for buttons and highlights, but use black text on #3FB551 — white text only reaches 2.64:1, below the 4.5:1 needed for normal-size labels.

Is #3FB551 the same as CSS mediumseagreen?

No — #3FB551 is not the CSS named color mediumseagreen, but mediumseagreen (#3CB371) is the closest CSS named color.

#3FB551 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3FB551

Not just a swatch — here's how #3FB551 works with other colors. Named schemes with #3FB551 in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #3FB551 Secondary #4C6B3C Accent #AD6C00 Surface #EEEAD6 Anchor #3C2F20

Medium Sea 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 #3FB551 Accent #A8C4BA Surface #E2D9BE Secondary #9AA09F Anchor #1A3648

Medium Sea Green 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 #3FB551 Surface #EEE9DC Highlight #F5F1E7 Secondary #B6B09F Ink #2B2723

Medium Sea 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.

Warm Autumn Interior Dominant · 5 colors

Dominant #3FB551 Secondary #AD6C00 Accent #687C4C Surface #F2EDDD Anchor #3A2B1E

This palette keeps Medium Sea 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 #3FB551 Secondary #ADD1AE Support #989286 Ink #17140F

Medium Sea 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 Sea Green carrying the quiet middle.

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Color Lab

How #3FB551 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 45/100

Neutral

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

Softness 46/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 33/100

Low

Mid depth — usable as an accent or a muted ground.

Naturalness 62/100

High

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

Vintage feel 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 37/100

Low

Understated — leans refined without going austere.

Brand distinctiveness 68/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 63/100

High

Strong interactive accent — visible and can carry a legible label.

Surface fit 25/100

Low

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

Print safety 62/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #3FB551

For UI

For branding

For interior

For fashion

People also use #3FB551 with

Mantis Jungle Green Byzantine 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 7.0:1. Use

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

Avoid beside #40B578 — 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 #3FB551 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

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: #3FB551;
  --color-base-rgb: 63 181 81;
  --color-base-oklch: oklch(68.5% 0.175 146.0);
  --color-50: #F3FBF5;
  --color-100: #E0F5E3;
  --color-200: #C3EAC9;
  --color-300: #99D7A2;
  --color-400: #71C17D;
  --color-500: #50A55D;
  --color-600: #437F4C;
  --color-700: #345B3A;
  --color-800: #253C28;
  --color-900: #18251A;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  medium-sea-green: {
    50: '#F3FBF5',
    100: '#E0F5E3',
    200: '#C3EAC9',
    300: '#99D7A2',
    400: '#71C17D',
    500: '#50A55D',
    600: '#437F4C',
    700: '#345B3A',
    800: '#253C28',
    900: '#18251A',
  },
}

$base: #3FB551;
$base-ink: #141310;
$base-50: #F3FBF5;
$base-100: #E0F5E3;
$base-200: #C3EAC9;
$base-300: #99D7A2;
$base-400: #71C17D;
$base-500: #50A55D;
$base-600: #437F4C;
$base-700: #345B3A;
$base-800: #253C28;
$base-900: #18251A;
$base-hover: #339141;
$base-subtle: #C9E6CD;

{
    "color": {
        "base": {
            "value": "#3FB551",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3FBF5",
                "type": "color"
            },
            "100": {
                "value": "#E0F5E3",
                "type": "color"
            },
            "200": {
                "value": "#C3EAC9",
                "type": "color"
            },
            "300": {
                "value": "#99D7A2",
                "type": "color"
            },
            "400": {
                "value": "#71C17D",
                "type": "color"
            },
            "500": {
                "value": "#50A55D",
                "type": "color"
            },
            "600": {
                "value": "#437F4C",
                "type": "color"
            },
            "700": {
                "value": "#345B3A",
                "type": "color"
            },
            "800": {
                "value": "#253C28",
                "type": "color"
            },
            "900": {
                "value": "#18251A",
                "type": "color"
            }
        }
    }
}

Palettes built on #3FB551

Color Lab

Pairs with #3FB551

UI roles & guardrails

In real applications

Scales

Every model

Export