What color is #217CDE?

#217CDE is a medium, vivid blue. In RGB it is rgb(33, 124, 222), and in HSL hsl(211, 74%, 50%).

Is #217CDE accessible as text?

On white, #217CDE has a contrast ratio of 4.20:1 (fails WCAG AA for body text); on black it is 5.00:1 (passes). For text placed on #217CDE, use black for the best readability.

What is the closest Tailwind color to #217CDE?

The nearest Tailwind CSS token is sky-600 (#0084D1).

What colors go well with #217CDE?

#217CDE pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #DE8321. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #217CDE below.

Is #217CDE good for buttons?

#217CDE works well for buttons and highlights, but use black text on #217CDE — white text only reaches 4.20:1, below the 4.5:1 needed for normal-size labels.

Is #217CDE the same as CSS royalblue?

No — #217CDE is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#217CDE Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #217CDE

Not just a swatch — here's how #217CDE works with other colors. Named schemes with #217CDE in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #217CDE Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #20344A

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

Tech Product Signal · 5 colors

Signal #217CDE Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #57A3FE

True 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 True Blue.

Vintage Leather Lead · 5 colors

Lead #217CDE Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57233B

True Blue plays the worn-leather lead, deepened by saddle brown and an oxblood anchor, softened by aged cream and cooled by a muted forest green.

Berry & Cream Lead · 5 colors

Lead #217CDE Surface #EDE9D6 Anchor #5A2145 Accent #E4C2CB Secondary #322B2F

True Blue sits between cream and a deep berry here, softened by a blush accent and grounded by charcoal.

Minimal Editorial Surface · 5 colors

Surface #F6F4EF Accent #217CDE Secondary #8EA9CC Support #9D8F89 Ink #16140F

True 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 True Blue carrying the quiet middle.

Build a working theme in the generator →

Color Lab

How #217CDE 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 4/100

Cool

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

Softness 41/100

Moderate

Middle-weight — neither delicate nor heavy.

Depth 43/100

Moderate

Mid depth — usable as an accent or a muted ground.

Naturalness 0/100

Very low

Reads engineered rather than organic — synthetic, digital.

Vintage feel 33/100

Low

A faint retro warmth without tipping into sepia.

Luxury 46/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 46/100

Moderate

Recognisable but shares space with nearby hues.

UI accent fit 91/100

Very high

Strong interactive accent — visible and can carry a legible label.

Surface fit 16/100

Very low

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

Print safety 65/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #217CDE

For UI

For branding

For interior

For fashion

People also use #217CDE with

Turquoise Ultramarine Peru Gainsboro Charcoal

UI roles & guardrails

Primary action Too mid-tone for a filled button — darken for the fill. AA Large

Body text Do not use for body copy on light surfaces. Avoid

Large display Fine for headings 24px+ on white. Pass

Background Pair with #141310 text at 4.4:1. Use

Subtle surface Use #D8E5F3 for cards and hover fills. Tint 80

Avoid beside #213DDE — 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 #217CDE 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: #217CDE;
  --color-base-rgb: 33 124 222;
  --color-base-oklch: oklch(58.7% 0.170 254.3);
  --color-50: #F1F7FE;
  --color-100: #DBEAFB;
  --color-200: #B8D5F4;
  --color-300: #88B6E7;
  --color-400: #5C97D6;
  --color-500: #3978BC;
  --color-600: #335F8F;
  --color-700: #2A4665;
  --color-800: #1F3042;
  --color-900: #151E29;
  --color-on-base: #141310;
}

// tailwind.config.js
colors: {
  true-blue: {
    50: '#F1F7FE',
    100: '#DBEAFB',
    200: '#B8D5F4',
    300: '#88B6E7',
    400: '#5C97D6',
    500: '#3978BC',
    600: '#335F8F',
    700: '#2A4665',
    800: '#1F3042',
    900: '#151E29',
  },
}

$base: #217CDE;
$base-ink: #141310;
$base-50: #F1F7FE;
$base-100: #DBEAFB;
$base-200: #B8D5F4;
$base-300: #88B6E7;
$base-400: #5C97D6;
$base-500: #3978BC;
$base-600: #335F8F;
$base-700: #2A4665;
$base-800: #1F3042;
$base-900: #151E29;
$base-hover: #1B63B1;
$base-subtle: #C3D8EE;

{
    "color": {
        "base": {
            "value": "#217CDE",
            "type": "color"
        },
        "onBase": {
            "value": "#141310",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F7FE",
                "type": "color"
            },
            "100": {
                "value": "#DBEAFB",
                "type": "color"
            },
            "200": {
                "value": "#B8D5F4",
                "type": "color"
            },
            "300": {
                "value": "#88B6E7",
                "type": "color"
            },
            "400": {
                "value": "#5C97D6",
                "type": "color"
            },
            "500": {
                "value": "#3978BC",
                "type": "color"
            },
            "600": {
                "value": "#335F8F",
                "type": "color"
            },
            "700": {
                "value": "#2A4665",
                "type": "color"
            },
            "800": {
                "value": "#1F3042",
                "type": "color"
            },
            "900": {
                "value": "#151E29",
                "type": "color"
            }
        }
    }
}

Palettes built on #217CDE

Color Lab

Pairs with #217CDE

UI roles & guardrails

In real applications

Scales

Every model

Export