What color is #210FA9?

#210FA9 is a dark, vivid indigo. In RGB it is rgb(33, 15, 169), and in HSL hsl(247, 84%, 36%).

Is #210FA9 accessible as text?

On white, #210FA9 has a contrast ratio of 12.31:1 (passes WCAG AA for body text); on black it is 1.71:1 (fails). For text placed on #210FA9, use white for the best readability.

What is the closest Tailwind color to #210FA9?

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

What colors go well with #210FA9?

#210FA9 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #97A90F. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #210FA9 below.

Is #210FA9 good for buttons?

#210FA9 works well for buttons and highlights, but use white text on #210FA9 — black text only reaches 1.71:1, below the 4.5:1 needed for normal-size labels.

Is #210FA9 the same as CSS mediumblue?

No — #210FA9 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#210FA9 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #210FA9

Not just a swatch — here's how #210FA9 works with other colors. Named schemes with #210FA9 in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #210FA9 Anchor #141210 Accent #DC9659 Secondary #252833 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 #210FA9 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3948C7

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 #210FA9 Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #23005E

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 #210FA9 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 #210FA9 Secondary #515F8D Support #9D8F88 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.

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Color Lab

How #210FA9 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 12/100

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 14/100

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 84/100

Very high

Bold and ownable — memorable as a primary brand color.

UI accent fit 46/100

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 #210FA9

For UI

For branding

For interior

For fashion

People also use #210FA9 with

Denim Blue Grape Citron Gainsboro Prussian Blue

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 12.3:1. Use

Subtle surface Use #CFCBF2 for cards and hover fills. Tint 80

Avoid beside #540FA9 — 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 #210FA9 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: #210FA9;
  --color-base-rgb: 33 15 169;
  --color-base-oklch: oklch(35.3% 0.217 271.3);
  --color-50: #F2F0FE;
  --color-100: #DDD8FD;
  --color-200: #BCB4F8;
  --color-300: #8E81EE;
  --color-400: #6453DF;
  --color-500: #4230C4;
  --color-600: #392D95;
  --color-700: #2D2569;
  --color-800: #211C45;
  --color-900: #16132A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  zaffre: {
    50: '#F2F0FE',
    100: '#DDD8FD',
    200: '#BCB4F8',
    300: '#8E81EE',
    400: '#6453DF',
    500: '#4230C4',
    600: '#392D95',
    700: '#2D2569',
    800: '#211C45',
    900: '#16132A',
  },
}

$base: #210FA9;
$base-ink: #FFFFFF;
$base-50: #F2F0FE;
$base-100: #DDD8FD;
$base-200: #BCB4F8;
$base-300: #8E81EE;
$base-400: #6453DF;
$base-500: #4230C4;
$base-600: #392D95;
$base-700: #2D2569;
$base-800: #211C45;
$base-900: #16132A;
$base-hover: #1A0C87;
$base-subtle: #B6AFED;

{
    "color": {
        "base": {
            "value": "#210FA9",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DDD8FD",
                "type": "color"
            },
            "200": {
                "value": "#BCB4F8",
                "type": "color"
            },
            "300": {
                "value": "#8E81EE",
                "type": "color"
            },
            "400": {
                "value": "#6453DF",
                "type": "color"
            },
            "500": {
                "value": "#4230C4",
                "type": "color"
            },
            "600": {
                "value": "#392D95",
                "type": "color"
            },
            "700": {
                "value": "#2D2569",
                "type": "color"
            },
            "800": {
                "value": "#211C45",
                "type": "color"
            },
            "900": {
                "value": "#16132A",
                "type": "color"
            }
        }
    }
}

Palettes built on #210FA9

Color Lab

Pairs with #210FA9

UI roles & guardrails

In real applications

Scales

Every model

Export