What color is #3307AC?

#3307AC is a dark, vivid indigo. In RGB it is rgb(51, 7, 172), and in HSL hsl(256, 92%, 35%).

Is #3307AC accessible as text?

On white, #3307AC has a contrast ratio of 11.89:1 (passes WCAG AA for body text); on black it is 1.77:1 (fails). For text placed on #3307AC, use white for the best readability.

What is the closest Tailwind color to #3307AC?

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

What colors go well with #3307AC?

#3307AC pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #80AB07. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #3307AC below.

Is #3307AC good for buttons?

#3307AC works well for buttons and highlights, but use white text on #3307AC — black text only reaches 1.77:1, below the 4.5:1 needed for normal-size labels.

Is #3307AC the same as CSS mediumblue?

No — #3307AC is not the CSS named color mediumblue, but mediumblue (#0000CD) 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.

#3307AC Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #3307AC

Not just a swatch — here's how #3307AC works with other colors. Named schemes with #3307AC in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #3307AC 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 #3307AC Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #2C005E

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 #3307AC Secondary #5A6090 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 #3307AC Accent #A5C4C2 Surface #EAD5BF Secondary #9AA0A1 Anchor #22344A

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 #3307AC Secondary #E86A71 Accent #F6934E Anchor #583B57 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 #3307AC 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 17/100

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 14/100

Very low

Clean and current — no dusty, aged cast.

Luxury 60/100

High

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

Brand distinctiveness 84/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 49/100

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 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #3307AC

For UI

For branding

For interior

For fashion

People also use #3307AC 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 11.9:1. Use

Subtle surface Use #D4C8F4 for cards and hover fills. Tint 80

Avoid beside #6A07AB — 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 #3307AC 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: #3307AC;
  --color-base-rgb: 51 7 172;
  --color-base-oklch: oklch(36.5% 0.218 278.2);
  --color-50: #F4F0FE;
  --color-100: #E2D8FD;
  --color-200: #C5B1FC;
  --color-300: #9C7CF3;
  --color-400: #754DE5;
  --color-500: #5529CB;
  --color-600: #46289A;
  --color-700: #36226D;
  --color-800: #261A47;
  --color-900: #19122B;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  zaffre: {
    50: '#F4F0FE',
    100: '#E2D8FD',
    200: '#C5B1FC',
    300: '#9C7CF3',
    400: '#754DE5',
    500: '#5529CB',
    600: '#46289A',
    700: '#36226D',
    800: '#261A47',
    900: '#19122B',
  },
}

$base: #3307AC;
$base-ink: #FFFFFF;
$base-50: #F4F0FE;
$base-100: #E2D8FD;
$base-200: #C5B1FC;
$base-300: #9C7CF3;
$base-400: #754DE5;
$base-500: #5529CB;
$base-600: #46289A;
$base-700: #36226D;
$base-800: #261A47;
$base-900: #19122B;
$base-hover: #290689;
$base-subtle: #BDABF0;

{
    "color": {
        "base": {
            "value": "#3307AC",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F4F0FE",
                "type": "color"
            },
            "100": {
                "value": "#E2D8FD",
                "type": "color"
            },
            "200": {
                "value": "#C5B1FC",
                "type": "color"
            },
            "300": {
                "value": "#9C7CF3",
                "type": "color"
            },
            "400": {
                "value": "#754DE5",
                "type": "color"
            },
            "500": {
                "value": "#5529CB",
                "type": "color"
            },
            "600": {
                "value": "#46289A",
                "type": "color"
            },
            "700": {
                "value": "#36226D",
                "type": "color"
            },
            "800": {
                "value": "#261A47",
                "type": "color"
            },
            "900": {
                "value": "#19122B",
                "type": "color"
            }
        }
    }
}

Palettes built on #3307AC

Color Lab

Pairs with #3307AC

UI roles & guardrails

In real applications

Scales

Every model

Export