What color is #EFF221?

#EFF221 is a medium, vivid yellow. In RGB it is rgb(239, 242, 33), and in HSL hsl(61, 89%, 54%).

Is #EFF221 accessible as text?

On white, #EFF221 has a contrast ratio of 1.21:1 (fails WCAG AA for body text); on black it is 17.39:1 (passes). For text placed on #EFF221, use black for the best readability.

What is the closest Tailwind color to #EFF221?

The nearest Tailwind CSS token is yellow-300 (#FFDF20).

What colors go well with #EFF221?

#EFF221 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #2521F2. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #EFF221 below.

Is #EFF221 good for buttons?

#EFF221 works well for buttons and highlights, but use black text on #EFF221 — white text only reaches 1.21:1, below the 4.5:1 needed for normal-size labels.

Is #EFF221 the same as CSS yellow?

No — #EFF221 is not the CSS named color yellow, but yellow (#FFFF00) is the closest CSS named color.

#EFF221 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #EFF221

Not just a swatch — here's how #EFF221 works with other colors. Named schemes with #EFF221 in its natural role, and a note on why the supporting colors balance it.

Sunset Warmth Glow · 5 colors

Glow #EFF221 Secondary #E4743A Accent #DFA327 Anchor #5F394B Surface #F2E9D6

Canary Yellow glows at the center of this sunset palette, joined by coral and gold, deepened by a plum anchor and cooled with cream.

Japanese Sand Base · 5 colors

Base #EFF221 Surface #EFE9DC Highlight #F6F1E7 Secondary #B8B09F Ink #2B2723

Canary Yellow 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 #EFF221 Secondary #B16908 Accent #6D7B49 Surface #F2ECDD Anchor #3A2B1F

This palette keeps Canary Yellow 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 #EFF221 Secondary #FCFFC9 Support #999186 Ink #17140F

Canary Yellow 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 Canary Yellow carrying the quiet middle.

Luxury Packaging Feature · 5 colors

Feature #EFF221 Anchor #141210 Accent #C5A44B Secondary #292A1F Surface #F2EDE3

Canary Yellow 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.

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Color Lab

How #EFF221 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 75/100

Warm

Reads warm and advancing — inviting, energetic, draws the eye forward.

Softness 56/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 8/100

Very low

Airy and open — recedes, leaves the composition light.

Naturalness 29/100

Low

Loosely natural — an earthy edge without being rustic.

Vintage feel 16/100

Very low

Clean and current — no dusty, aged cast.

Luxury 11/100

Very low

Playful and accessible rather than exclusive.

Brand distinctiveness 77/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 6/100

Very 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 63/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #EFF221

For UI

For branding

For interior

For fashion

People also use #EFF221 with

Carrot Lawn Green Han Purple Platinum Army 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 15.4:1. Use

Subtle surface Use #F6F7D9 for cards and hover fills. Tint 80

Avoid beside #A9F221 — 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 #EFF221 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: #EFF221;
  --color-base-rgb: 239 242 33;
  --color-base-oklch: oklch(92.8% 0.198 110.6);
  --color-50: #FEFEF0;
  --color-100: #FDFDD8;
  --color-200: #F9FAB2;
  --color-300: #EFF17E;
  --color-400: #E0E34F;
  --color-500: #C6C92C;
  --color-600: #96982A;
  --color-700: #6A6B23;
  --color-800: #45461B;
  --color-900: #2A2B13;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  canary-yellow: {
    50: '#FEFEF0',
    100: '#FDFDD8',
    200: '#F9FAB2',
    300: '#EFF17E',
    400: '#E0E34F',
    500: '#C6C92C',
    600: '#96982A',
    700: '#6A6B23',
    800: '#45461B',
    900: '#2A2B13',
  },
}

$base: #EFF221;
$base-ink: #141310;
$base-50: #FEFEF0;
$base-100: #FDFDD8;
$base-200: #F9FAB2;
$base-300: #EFF17E;
$base-400: #E0E34F;
$base-500: #C6C92C;
$base-600: #96982A;
$base-700: #6A6B23;
$base-800: #45461B;
$base-900: #2A2B13;
$base-hover: #CDD00C;
$base-subtle: #F3F4C4;

{
    "color": {
        "base": {
            "value": "#EFF221",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#FEFEF0",
                "type": "color"
            },
            "100": {
                "value": "#FDFDD8",
                "type": "color"
            },
            "200": {
                "value": "#F9FAB2",
                "type": "color"
            },
            "300": {
                "value": "#EFF17E",
                "type": "color"
            },
            "400": {
                "value": "#E0E34F",
                "type": "color"
            },
            "500": {
                "value": "#C6C92C",
                "type": "color"
            },
            "600": {
                "value": "#96982A",
                "type": "color"
            },
            "700": {
                "value": "#6A6B23",
                "type": "color"
            },
            "800": {
                "value": "#45461B",
                "type": "color"
            },
            "900": {
                "value": "#2A2B13",
                "type": "color"
            }
        }
    }
}

Palettes built on #EFF221

Color Lab

Pairs with #EFF221

UI roles & guardrails

In real applications

Scales

Every model

Export