What color is #210E8D?

#210E8D is a dark, vivid indigo. In RGB it is rgb(33, 14, 141), and in HSL hsl(249, 82%, 30%).

Is #210E8D accessible as text?

On white, #210E8D has a contrast ratio of 13.89:1 (passes WCAG AA for body text); on black it is 1.51:1 (fails). For text placed on #210E8D, use white for the best readability.

What is the closest Tailwind color to #210E8D?

The nearest Tailwind CSS token is indigo-900 (#312C85).

What colors go well with #210E8D?

#210E8D pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #788B0E. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #210E8D below.

Is #210E8D good for buttons?

#210E8D works well for buttons and highlights, but use white text on #210E8D — black text only reaches 1.51:1, below the 4.5:1 needed for normal-size labels.

Is #210E8D the same as CSS darkblue?

No — #210E8D is not the CSS named color darkblue, but darkblue (#00008B) is the closest CSS named color.

#210E8D Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #210E8D

Not just a swatch — here's how #210E8D works with other colors. Named schemes with #210E8D in its natural role, and a note on why the supporting colors balance it.

Luxury Packaging Feature · 5 colors

Feature #210E8D Anchor #141210 Accent #DC9659 Secondary #262833 Surface #F3ECE3

Phthalo Blue 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 #210E8D Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #3A41AB

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

Moody Editorial Color · 5 colors

Color #210E8D Anchor #2A2A2E Secondary #6E6E74 Surface #EEE5DB Accent #1C0049

Phthalo Blue 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 Phthalo Blue.

Coastal Morning Lead · 5 colors

Lead #210E8D Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Phthalo Blue 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 #210E8D Secondary #4C547B Support #9D9088 Ink #18140F

Phthalo Blue 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 Phthalo Blue carrying the quiet middle.

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Color Lab

How #210E8D 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 73/100

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 20/100

Low

Clean and current — no dusty, aged cast.

Luxury 67/100

High

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

Brand distinctiveness 72/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 42/100

Moderate

Workable accent with care around contrast.

Surface fit 19/100

Very low

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

Print safety 70/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #210E8D

For UI

For branding

For interior

For fashion

People also use #210E8D with

Sapphire Blue Eminence Olive 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 13.9:1. Use

Subtle surface Use #CDC6F0 for cards and hover fills. Tint 80

Avoid beside #4A0E8B — 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 #210E8D 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: #210E8D;
  --color-base-rgb: 33 14 141;
  --color-base-oklch: oklch(31.6% 0.186 274.2);
  --color-50: #F3F0FE;
  --color-100: #DED9FC;
  --color-200: #BFB5F8;
  --color-300: #9383ED;
  --color-400: #6955DD;
  --color-500: #4832C3;
  --color-600: #3D2E94;
  --color-700: #302669;
  --color-800: #231D44;
  --color-900: #17142A;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  phthalo-blue: {
    50: '#F3F0FE',
    100: '#DED9FC',
    200: '#BFB5F8',
    300: '#9383ED',
    400: '#6955DD',
    500: '#4832C3',
    600: '#3D2E94',
    700: '#302669',
    800: '#231D44',
    900: '#17142A',
  },
}

$base: #210E8D;
$base-ink: #FFFFFF;
$base-50: #F3F0FE;
$base-100: #DED9FC;
$base-200: #BFB5F8;
$base-300: #9383ED;
$base-400: #6955DD;
$base-500: #4832C3;
$base-600: #3D2E94;
$base-700: #302669;
$base-800: #231D44;
$base-900: #17142A;
$base-hover: #1A0B6F;
$base-subtle: #B2A8EB;

{
    "color": {
        "base": {
            "value": "#210E8D",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F0FE",
                "type": "color"
            },
            "100": {
                "value": "#DED9FC",
                "type": "color"
            },
            "200": {
                "value": "#BFB5F8",
                "type": "color"
            },
            "300": {
                "value": "#9383ED",
                "type": "color"
            },
            "400": {
                "value": "#6955DD",
                "type": "color"
            },
            "500": {
                "value": "#4832C3",
                "type": "color"
            },
            "600": {
                "value": "#3D2E94",
                "type": "color"
            },
            "700": {
                "value": "#302669",
                "type": "color"
            },
            "800": {
                "value": "#231D44",
                "type": "color"
            },
            "900": {
                "value": "#17142A",
                "type": "color"
            }
        }
    }
}

Palettes built on #210E8D

Color Lab

Pairs with #210E8D

UI roles & guardrails

In real applications

Scales

Every model

Export