What color is #313FC3?

#313FC3 is a medium blue. In RGB it is rgb(49, 63, 195), and in HSL hsl(234, 60%, 48%).

Is #313FC3 accessible as text?

On white, #313FC3 has a contrast ratio of 7.99:1 (passes WCAG AA for body text); on black it is 2.63:1 (fails). For text placed on #313FC3, use white for the best readability.

What is the closest Tailwind color to #313FC3?

The nearest Tailwind CSS token is blue-800 (#193CB8).

What colors go well with #313FC3?

#313FC3 pairs cleanly with neutrals — cream, taupe, charcoal and cool grays — and with its complementary #C4B531. In UI, a softer accent is often easier to use than the exact complement. Explore the harmonies, shades, tints and ready-made palettes for #313FC3 below.

Is #313FC3 good for buttons?

#313FC3 works well for buttons and highlights, but use white text on #313FC3 — black text only reaches 2.63:1, below the 4.5:1 needed for normal-size labels.

Is #313FC3 the same as CSS mediumblue?

No — #313FC3 is not the CSS named color mediumblue, but mediumblue (#0000CD) is the closest CSS named color.

#313FC3 Color — HEX, RGB, HSL, Palette & Shades

Palettes built on #313FC3

Not just a swatch — here's how #313FC3 works with other colors. Named schemes with #313FC3 in its natural role, and a note on why the supporting colors balance it.

Tech Product Signal · 5 colors

Signal #313FC3 Surface #14161A Highlight #F4F6F8 Secondary #5B6672 Accent #516AE1

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

Coastal Morning Lead · 5 colors

Lead #313FC3 Accent #A5C4C2 Surface #EAD5C0 Secondary #9AA0A1 Anchor #21344A

Cerulean 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 #313FC3 Surface #F6E5D8 Anchor #5B2143 Accent #E5C2C9 Secondary #322B2F

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

Minimal Editorial Surface · 5 colors

Surface #F8F4EF Accent #313FC3 Secondary #6D7BA8 Support #9D8F88 Ink #18140F

Cerulean 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 Cerulean carrying the quiet middle.

Sunset Warmth Glow · 5 colors

Glow #313FC3 Secondary #E86A73 Accent #F69250 Anchor #573B58 Surface #F7E7D7

Cerulean 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 #313FC3 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 29/100

Low

Firm and assertive — carries weight and contrast.

Depth 59/100

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 21/100

Low

Clean and current — no dusty, aged cast.

Luxury 55/100

Moderate

Understated — leans refined without going austere.

Brand distinctiveness 78/100

High

Bold and ownable — memorable as a primary brand color.

UI accent fit 76/100

High

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

Surface fit 11/100

Very low

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

Print safety 66/100

High

Prints close, with a slight loss of vibrancy.

Pairs with #313FC3

For UI

For branding

For interior

For fashion

People also use #313FC3 with

Carolina Blue Grape Mustard Yellow 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 8.0:1. Use

Subtle surface Use #D9DBF0 for cards and hover fills. Tint 80

Avoid beside #5331C4 — 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 #313FC3 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: #313FC3;
  --color-base-rgb: 49 63 195;
  --color-base-oklch: oklch(45.0% 0.203 270.7);
  --color-50: #F2F3FC;
  --color-100: #DEE0F8;
  --color-200: #BEC3EF;
  --color-300: #9199DE;
  --color-400: #6771CB;
  --color-500: #4650AF;
  --color-600: #3C4386;
  --color-700: #2F3460;
  --color-800: #22253F;
  --color-900: #161827;
  --color-on-base: #FFFFFF;
}

// tailwind.config.js
colors: {
  cerulean: {
    50: '#F2F3FC',
    100: '#DEE0F8',
    200: '#BEC3EF',
    300: '#9199DE',
    400: '#6771CB',
    500: '#4650AF',
    600: '#3C4386',
    700: '#2F3460',
    800: '#22253F',
    900: '#161827',
  },
}

$base: #313FC3;
$base-ink: #FFFFFF;
$base-50: #F2F3FC;
$base-100: #DEE0F8;
$base-200: #BEC3EF;
$base-300: #9199DE;
$base-400: #6771CB;
$base-500: #4650AF;
$base-600: #3C4386;
$base-700: #2F3460;
$base-800: #22253F;
$base-900: #161827;
$base-hover: #27339D;
$base-subtle: #C5C9E9;

{
    "color": {
        "base": {
            "value": "#313FC3",
            "type": "color"
        },
        "onBase": {
            "value": "#FFFFFF",
            "type": "color"
        },
        "scale": {
            "50": {
                "value": "#F2F3FC",
                "type": "color"
            },
            "100": {
                "value": "#DEE0F8",
                "type": "color"
            },
            "200": {
                "value": "#BEC3EF",
                "type": "color"
            },
            "300": {
                "value": "#9199DE",
                "type": "color"
            },
            "400": {
                "value": "#6771CB",
                "type": "color"
            },
            "500": {
                "value": "#4650AF",
                "type": "color"
            },
            "600": {
                "value": "#3C4386",
                "type": "color"
            },
            "700": {
                "value": "#2F3460",
                "type": "color"
            },
            "800": {
                "value": "#22253F",
                "type": "color"
            },
            "900": {
                "value": "#161827",
                "type": "color"
            }
        }
    }
}

Palettes built on #313FC3

Color Lab

Pairs with #313FC3

UI roles & guardrails

In real applications

Scales

Every model

Export