What color is #3003B7?

#3003B7 is a dark, vivid indigo. In RGB it is rgb(48, 3, 183), and in HSL hsl(255, 97%, 36%).

Is #3003B7 accessible as text?

On white, #3003B7 has a contrast ratio of 11.52:1 (passes WCAG AA for body text); on black it is 1.82:1 (fails). For text placed on #3003B7, use white for the best readability.

What is the closest Tailwind color to #3003B7?

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

What colors go well with #3003B7?

#3003B7 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #88B503. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3003B7 below.

Is #3003B7 good for buttons?

#3003B7 works well for buttons and highlights, but use white text on #3003B7 — black text only reaches 1.82:1, below the 4.5:1 needed for normal-size labels.

Is #3003B7 the same as CSS mediumblue?

No — #3003B7 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#3003B7 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3003B7

Not just a swatch — here's how #3003B7 works with other colors. Named schemes with #3003B7 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #3003B7 Anchor #141210 Accent #DC9758 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.

Moody Editorial Color · 5 colors

Color #3003B7 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #2D0066

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.

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #3003B7 Secondary #5A6396 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.

Coastal Morning Lead · 5 colors

Lead #3003B7 Accent #A5C4C2 Surface #EAD5BF 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.

Sunset Warmth Glow · 5 colors

Glow #3003B7 Secondary #E86A72 Accent #F6924E Anchor #573B57 Surface #F7E7D7

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

Build a working theme in the generator →

Color Lab

How #3003B7 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 15/100

Cool

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

Softness 22/100

Low

Firm and assertive — carries weight and contrast.

Depth 69/100

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 11/100

Very low

Clean and current — no dusty, aged cast.

Luxury 58/100

Moderate

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

Brand distinctiveness 90/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 47/100

Moderate

Workable accent with care around contrast.

Surface fit 16/100

Very low

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

Print safety 63/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #3003B7

For UI

For branding

For interior

For fashion

People also use #3003B7 with

Cerulean 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 11.5:1. Use

Subtle surface Use #D3C8F5 for cards and hover fills. Tint 80

Avoid beside #6B03B5 — 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 #3003B7 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: #3003B7;
  --color-base-rgb: 48 3 183;
  --color-base-oklch: oklch(37.4% 0.232 275.6);
  --color-50: #F4F0FE;
  --color-100: #E1D8FD;
  --color-200: #C3B1FC;
  --color-300: #9879F6;
  --color-400: #7149E9;
  --color-500: #5025D0;
  --color-600: #43259D;
  --color-700: #34206F;
  --color-800: #251948;
  --color-900: #18112C;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  zaffre: {
    50: '#F4F0FE',
    100: '#E1D8FD',
    200: '#C3B1FC',
    300: '#9879F6',
    400: '#7149E9',
    500: '#5025D0',
    600: '#43259D',
    700: '#34206F',
    800: '#251948',
    900: '#18112C',
  },
}

$base: #3003B7;
$base-ink: #FFFFFF;
$base-50: #F4F0FE;
$base-100: #E1D8FD;
$base-200: #C3B1FC;
$base-300: #9879F6;
$base-400: #7149E9;
$base-500: #5025D0;
$base-600: #43259D;
$base-700: #34206F;
$base-800: #251948;
$base-900: #18112C;
$base-hover: #260291;
$base-subtle: #BCAAF2;

{
    "color": {
        "base": {
            "value": "#3003B7",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E1D8FD",
                "type": "color"
            },
            "200": {
                "value": "#C3B1FC",
                "type": "color"
            },
            "300": {
                "value": "#9879F6",
                "type": "color"
            },
            "400": {
                "value": "#7149E9",
                "type": "color"
            },
            "500": {
                "value": "#5025D0",
                "type": "color"
            },
            "600": {
                "value": "#43259D",
                "type": "color"
            },
            "700": {
                "value": "#34206F",
                "type": "color"
            },
            "800": {
                "value": "#251948",
                "type": "color"
            },
            "900": {
                "value": "#18112C",
                "type": "color"
            }
        }
    }
}

Palettes built on #3003B7

Color Lab

Pairs with #3003B7

UI roles & guardrails

In real applications

Scales

Every model

Export