What color is #266CDF?

#266CDF is a medium, vivid blue. In RGB it is rgb(38, 108, 223), and in HSL hsl(217, 74%, 51%).

Is #266CDF accessible as text?

On white, #266CDF has a contrast ratio of 4.89:1 (passes WCAG AA for body text); on black it is 4.29:1 (fails). For text placed on #266CDF, use white for the best readability.

What is the closest Tailwind color to #266CDF?

The nearest Tailwind CSS token is blue-600 (#155DFC).

What colors go well with #266CDF?

#266CDF pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #DF9826. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #266CDF below.

Is #266CDF good for buttons?

#266CDF works well for buttons and highlights, but use white text on #266CDF — black text only reaches 4.29:1, below the 4.5:1 needed for normal-size labels.

Is #266CDF the same as CSS royalblue?

No — #266CDF is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#266CDF Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #266CDF

Not just a swatch — here's how #266CDF works with other colors. Named schemes with #266CDF in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #266CDF Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5594FE

Royal 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 Royal Blue.

Coastal Morning Lead · 5 colors

Lead #266CDF Accent #A5C4C1 Surface #DDDBBF Secondary #9AA0A1 Anchor #21344A

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

Berry & Cream Lead · 5 colors

Lead #266CDF Surface #F6E5D8 Anchor #5A2144 Accent #E4C2CA Secondary #322B2F

Royal 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 #266CDF Secondary #859EC6 Support #9D8F88 Ink #16140F

Royal 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 Royal Blue carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #266CDF Secondary #E76A76 Accent #F79152 Anchor #573B58 Surface #EEEBD6

Royal Blue 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 #266CDF 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 7/100

Cool

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

Softness 36/100

Low

Middle-weight — neither delicate nor heavy.

Depth 47/100

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 29/100

Low

A faint retro warmth without tipping into sepia.

Luxury 47/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 73/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 90/100

Very high

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

Surface fit 13/100

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 #266CDF

For UI

For branding

For interior

For fashion

People also use #266CDF with

Turquoise Han Purple Butterscotch Gainsboro Charcoal

UI roles & guardrails

Primary action Safe as a filled button with white label. AA

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 4.9:1. Use

Subtle surface Use #D9E3F3 for cards and hover fills. Tint 80

Avoid beside #262FDF — 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 #266CDF 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: #266CDF;
  --color-base-rgb: 38 108 223;
  --color-base-oklch: oklch(55.5% 0.189 260.1);
  --color-50: #F1F6FE;
  --color-100: #DBE7FB;
  --color-200: #B8CFF4;
  --color-300: #88ACE7;
  --color-400: #5C8BD6;
  --color-500: #396BBC;
  --color-600: #33568F;
  --color-700: #2A4065;
  --color-800: #1F2C42;
  --color-900: #151C29;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  royal-blue: {
    50: '#F1F6FE',
    100: '#DBE7FB',
    200: '#B8CFF4',
    300: '#88ACE7',
    400: '#5C8BD6',
    500: '#396BBC',
    600: '#33568F',
    700: '#2A4065',
    800: '#1F2C42',
    900: '#151C29',
  },
}

$base: #266CDF;
$base-ink: #FFFFFF;
$base-50: #F1F6FE;
$base-100: #DBE7FB;
$base-200: #B8CFF4;
$base-300: #88ACE7;
$base-400: #5C8BD6;
$base-500: #396BBC;
$base-600: #33568F;
$base-700: #2A4065;
$base-800: #1F2C42;
$base-900: #151C29;
$base-hover: #1B56B5;
$base-subtle: #C4D5EF;

{
    "color": {
        "base": {
            "value": "#266CDF",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F1F6FE",
                "type": "color"
            },
            "100": {
                "value": "#DBE7FB",
                "type": "color"
            },
            "200": {
                "value": "#B8CFF4",
                "type": "color"
            },
            "300": {
                "value": "#88ACE7",
                "type": "color"
            },
            "400": {
                "value": "#5C8BD6",
                "type": "color"
            },
            "500": {
                "value": "#396BBC",
                "type": "color"
            },
            "600": {
                "value": "#33568F",
                "type": "color"
            },
            "700": {
                "value": "#2A4065",
                "type": "color"
            },
            "800": {
                "value": "#1F2C42",
                "type": "color"
            },
            "900": {
                "value": "#151C29",
                "type": "color"
            }
        }
    }
}