What color is #356EC3?

#356EC3 is a medium blue. In RGB it is rgb(53, 110, 195), and in HSL hsl(216, 57%, 49%).

Is #356EC3 accessible as text?

On white, #356EC3 has a contrast ratio of 5.04:1 (passes WCAG AA for body text); on black it is 4.17:1 (fails). For text placed on #356EC3, use white for the best readability.

What is the closest Tailwind color to #356EC3?

The nearest Tailwind CSS token is sky-700 (#0069A8).

What colors go well with #356EC3?

#356EC3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C48B36. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #356EC3 below.

Is #356EC3 good for buttons?

#356EC3 works well for buttons and highlights, but use white text on #356EC3 — black text only reaches 4.17:1, below the 4.5:1 needed for normal-size labels.

Is #356EC3 the same as CSS royalblue?

No — #356EC3 is not the CSS named color royalblue, but royalblue (#4169E1) is the closest CSS named color.

#356EC3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #356EC3

Not just a swatch — here's how #356EC3 works with other colors. Named schemes with #356EC3 in its natural role, and a note on why the supporting colors balance it.

Coastal Morning Lead · 5 colors

Lead #356EC3 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 #356EC3 Surface #14161A Highlight #F4F6F8 Secondary #5A6672 Accent #5F94E3

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 #356EC3 Secondary #7F4537 Surface #E1DDC1 Accent #375246 Anchor #57223A

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 #356EC3 Surface #EDE9D6 Anchor #5A2144 Accent #E4C2CA 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 #356EC3 Secondary #879BBA 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 #356EC3 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 41/100

Moderate

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 43/100

Moderate

A faint retro warmth without tipping into sepia.

Luxury 51/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 39/100

Low

Recognisable but shares space with nearby hues.

UI accent fit 100/100

Very high

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

Surface fit 12/100

Very low

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

Print safety 71/100

High

Reproduces faithfully in CMYK — safe for packaging and print.

Pairs with #356EC3

For UI

For branding

For interior

For fashion

People also use #356EC3 with

Medium Turquoise Cerulean Caramel 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 5.0:1. Use

Subtle surface Use #DAE3F0 for cards and hover fills. Tint 80

Avoid beside #363FC4 — 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 #356EC3 at work across the surfaces designers actually ship.

Website / UI

Northwind Sign up

Build faster.

A working theme, generated in seconds.

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: #356EC3;
  --color-base-rgb: 53 110 195;
  --color-base-oklch: oklch(54.4% 0.146 258.4);
  --color-50: #F3F6FC;
  --color-100: #DEE8F7;
  --color-200: #BFD2ED;
  --color-300: #93B0DC;
  --color-400: #6A90C8;
  --color-500: #4870AD;
  --color-600: #3D5A84;
  --color-700: #30435E;
  --color-800: #232E3E;
  --color-900: #171D26;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  true-blue: {
    50: '#F3F6FC',
    100: '#DEE8F7',
    200: '#BFD2ED',
    300: '#93B0DC',
    400: '#6A90C8',
    500: '#4870AD',
    600: '#3D5A84',
    700: '#30435E',
    800: '#232E3E',
    900: '#171D26',
  },
}

$base: #356EC3;
$base-ink: #FFFFFF;
$base-50: #F3F6FC;
$base-100: #DEE8F7;
$base-200: #BFD2ED;
$base-300: #93B0DC;
$base-400: #6A90C8;
$base-500: #4870AD;
$base-600: #3D5A84;
$base-700: #30435E;
$base-800: #232E3E;
$base-900: #171D26;
$base-hover: #2B599D;
$base-subtle: #C7D5E9;

{
    "color": {
        "base": {
            "value": "#356EC3",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F3F6FC",
                "type": "color"
            },
            "100": {
                "value": "#DEE8F7",
                "type": "color"
            },
            "200": {
                "value": "#BFD2ED",
                "type": "color"
            },
            "300": {
                "value": "#93B0DC",
                "type": "color"
            },
            "400": {
                "value": "#6A90C8",
                "type": "color"
            },
            "500": {
                "value": "#4870AD",
                "type": "color"
            },
            "600": {
                "value": "#3D5A84",
                "type": "color"
            },
            "700": {
                "value": "#30435E",
                "type": "color"
            },
            "800": {
                "value": "#232E3E",
                "type": "color"
            },
            "900": {
                "value": "#171D26",
                "type": "color"
            }
        }
    }
}

Palettes built on #356EC3

Color Lab

Pairs with #356EC3

UI roles & guardrails

In real applications

Scales

Every model

Export