What color is #2803AB?

#2803AB is a dark, vivid indigo. In RGB it is rgb(40, 3, 171), and in HSL hsl(253, 97%, 34%).

Is #2803AB accessible as text?

On white, #2803AB has a contrast ratio of 12.42:1 (passes WCAG AA for body text); on black it is 1.69:1 (fails). For text placed on #2803AB, use white for the best readability.

What is the closest Tailwind color to #2803AB?

The nearest Tailwind CSS token is indigo-800 (#372AAC).

What colors go well with #2803AB?

#2803AB pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #86AB03. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #2803AB below.

Is #2803AB good for buttons?

#2803AB works well for buttons and highlights, but use white text on #2803AB — black text only reaches 1.69:1, below the 4.5:1 needed for normal-size labels.

Is #2803AB the same as CSS mediumblue?

No — #2803AB is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#2803AB Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #2803AB

Not just a swatch — here's how #2803AB works with other colors. Named schemes with #2803AB in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #2803AB Anchor #141210 Accent #DC9659 Secondary #262833 Surface #F3ECE3

Zaffre 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.

Tech Product Signal · 5 colors

Signal #2803AB Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3F45C8

Zaffre is the vivid signal in this product UI — on a near-black surface with cool white, a slate grey and a lighter tint of Zaffre.

Moody Editorial Color · 5 colors

Color #2803AB Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #26005E

Zaffre adds the colour to this moody editorial scheme — charcoal and a mid-grey around it, a bone highlight, and a muted jewel accent drawn from Zaffre.

Coastal Morning Lead · 5 colors

Lead #2803AB Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #2803AB Secondary #535E8D Support #9D9088 Ink #18140F

Zaffre 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 Zaffre carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #2803AB 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 14/100

Cool

Reads cool and recessive — calming, technical, good for trust-led UI.

Softness 22/100

Low

Firm and assertive — carries weight and contrast.

Depth 70/100

High

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

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 13/100

Very low

Clean and current — no dusty, aged cast.

Luxury 61/100

High

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

Brand distinctiveness 86/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 45/100

Moderate

Workable accent with care around contrast.

Surface fit 17/100

Very low

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

Print safety 64/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #2803AB

For UI

For branding

For interior

For fashion

People also use #2803AB with

Sapphire Blue Mauveine Olive Drab Gainsboro Russian Violet

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 12.4:1. Use

Subtle surface Use #D0C6F5 for cards and hover fills. Tint 80

Avoid beside #5F03AB — 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 #2803AB 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: #2803AB;
  --color-base-rgb: 40 3 171;
  --color-base-oklch: oklch(35.3% 0.222 273.9);
  --color-50: #F3F0FE;
  --color-100: #E0D8FD;
  --color-200: #C1B1FC;
  --color-300: #9479F6;
  --color-400: #6C49E9;
  --color-500: #4A25D0;
  --color-600: #3F259D;
  --color-700: #31206F;
  --color-800: #231948;
  --color-900: #17112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  zaffre: {
    50: '#F3F0FE',
    100: '#E0D8FD',
    200: '#C1B1FC',
    300: '#9479F6',
    400: '#6C49E9',
    500: '#4A25D0',
    600: '#3F259D',
    700: '#31206F',
    800: '#231948',
    900: '#17112C',
  },
}

$base: #2803AB;
$base-ink: #FFFFFF;
$base-50: #F3F0FE;
$base-100: #E0D8FD;
$base-200: #C1B1FC;
$base-300: #9479F6;
$base-400: #6C49E9;
$base-500: #4A25D0;
$base-600: #3F259D;
$base-700: #31206F;
$base-800: #231948;
$base-900: #17112C;
$base-hover: #1F0289;
$base-subtle: #B7A7F2;

{
    "color": {
        "base": {
            "value": "#2803AB",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E0D8FD",
                "type": "color"
            },
            "200": {
                "value": "#C1B1FC",
                "type": "color"
            },
            "300": {
                "value": "#9479F6",
                "type": "color"
            },
            "400": {
                "value": "#6C49E9",
                "type": "color"
            },
            "500": {
                "value": "#4A25D0",
                "type": "color"
            },
            "600": {
                "value": "#3F259D",
                "type": "color"
            },
            "700": {
                "value": "#31206F",
                "type": "color"
            },
            "800": {
                "value": "#231948",
                "type": "color"
            },
            "900": {
                "value": "#17112C",
                "type": "color"
            }
        }
    }
}

Palettes built on #2803AB

Color Lab

Pairs with #2803AB

UI roles & guardrails

In real applications

Scales

Every model

Export