What color is #03311B?

#03311B is a very dark, vivid teal-green. In RGB it is rgb(3, 49, 27), and in HSL hsl(151, 88%, 10%).

Is #03311B accessible as text?

On white, #03311B has a contrast ratio of 14.39:1 (passes WCAG AA for body text); on black it is 1.46:1 (fails). For text placed on #03311B, use white for the best readability.

What is the closest Tailwind color to #03311B?

The nearest Tailwind CSS token is green-950 (#032E15).

What colors go well with #03311B?

#03311B pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #300319. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #03311B below.

Is #03311B good for buttons?

#03311B works well for buttons and highlights, but use white text on #03311B — black text only reaches 1.46:1, below the 4.5:1 needed for normal-size labels.

Is #03311B the same as CSS darkslategray?

No — #03311B is not the CSS named color darkslategray, but darkslategray (#2F4F4F) is the closest CSS named color by perceptual color distance — it sits in a different color family, so treat it as a rough reference, not a match.

#03311B Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #03311B

Not just a swatch — here's how #03311B works with other colors. Named schemes with #03311B in its natural role, and a note on why the supporting colors balance it.

Botanical Studio Lead · 5 colors

Lead #03311B Secondary #4A6C3D Accent #AC6C00 Surface #EEEAD6 Anchor #3C2F20

Sacramento Green leads this botanical set among foliage greens and a terracotta accent, softened by cream and grounded in bark brown.

Vintage Leather Lead · 5 colors

Lead #03311B Secondary #744E1A Surface #E5DBC0 Accent #3C5140 Anchor #5B2321

Sacramento Green plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Japanese Sand Base · 5 colors

Base #03311B Surface #EEEADC Highlight #F5F1E7 Secondary #B6B09F Ink #2A2723

Sacramento 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.

Luxury Packaging Feature · 5 colors

Feature #03311B Anchor #141210 Accent #BEA74B Secondary #212C25 Surface #F1EDE3

Sacramento Green carries the depth in this luxury scheme, offset by a brass accent and near-black and held together by a deep neutral and an off-white surface.

Minimal Editorial Surface · 5 colors

Surface #F7F4EF Accent #03311B Secondary #435047 Support #989286 Ink #17140F

Sacramento 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 Sacramento Green carrying the quiet middle.

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Color Lab

How #03311B 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 27/100

Low

Firm and assertive — carries weight and contrast.

Depth 70/100

High

Deep and grounding — anchors a layout, strong dark-mode base.

Naturalness 65/100

High

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

Vintage feel 38/100

Low

A faint retro warmth without tipping into sepia.

Luxury 73/100

High

Restrained and premium — deep, quiet, high-end packaging and fashion.

Brand distinctiveness 24/100

Low

Quiet and neutral — a supporting tone, not a signature.

UI accent fit 26/100

Low

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

Surface fit 48/100

Moderate

Usable as a tinted surface in measured doses.

Print safety 87/100

Very high

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #03311B

For UI

For branding

For interior

For fashion

People also use #03311B with

Dark Green Sacramento Green Graphite Platinum Hunter Green

UI roles & guardrails

Primary action Safe as a filled button with white label. AAA

Body text Passes on white at 16px and above. Pass

Large display Fine for headings 24px+ on white. Pass

Background Pair with white text at 14.4:1. Use

Subtle surface Use #B4EED2 for cards and hover fills. Tint 80

Avoid beside #033029 — 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 #03311B 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: #03311B;
  --color-base-rgb: 3 49 27;
  --color-base-oklch: oklch(27.7% 0.063 156.9);
  --color-50: #F0FEF8;
  --color-100: #D8FDEB;
  --color-200: #B2FAD7;
  --color-300: #7FF0B9;
  --color-400: #50E29B;
  --color-500: #2DC87D;
  --color-600: #2A9863;
  --color-700: #246B49;
  --color-800: #1B4631;
  --color-900: #132B1F;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  sacramento-green: {
    50: '#F0FEF8',
    100: '#D8FDEB',
    200: '#B2FAD7',
    300: '#7FF0B9',
    400: '#50E29B',
    500: '#2DC87D',
    600: '#2A9863',
    700: '#246B49',
    800: '#1B4631',
    900: '#132B1F',
  },
}

$base: #03311B;
$base-ink: #FFFFFF;
$base-50: #F0FEF8;
$base-100: #D8FDEB;
$base-200: #B2FAD7;
$base-300: #7FF0B9;
$base-400: #50E29B;
$base-500: #2DC87D;
$base-600: #2A9863;
$base-700: #246B49;
$base-800: #1B4631;
$base-900: #132B1F;
$base-hover: #022615;
$base-subtle: #8CE8BC;

{
    "color": {
        "base": {
            "value": "#03311B",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F0FEF8",
                "type": "color"
            },
            "100": {
                "value": "#D8FDEB",
                "type": "color"
            },
            "200": {
                "value": "#B2FAD7",
                "type": "color"
            },
            "300": {
                "value": "#7FF0B9",
                "type": "color"
            },
            "400": {
                "value": "#50E29B",
                "type": "color"
            },
            "500": {
                "value": "#2DC87D",
                "type": "color"
            },
            "600": {
                "value": "#2A9863",
                "type": "color"
            },
            "700": {
                "value": "#246B49",
                "type": "color"
            },
            "800": {
                "value": "#1B4631",
                "type": "color"
            },
            "900": {
                "value": "#132B1F",
                "type": "color"
            }
        }
    }
}

Palettes built on #03311B

Color Lab

Pairs with #03311B

UI roles & guardrails

In real applications

Scales

Every model

Export