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blue · cool

#274ade

a balanced, vivid blue · cool · closest name: Slate Blue

Token name suggestion: Signal Denim

RGB
39, 74, 222
HSL
229°, 74%, 51%
CMYK
82, 67, 0, 13
Luminance
0.1060

#274ade is a balanced vivid blue, 229° on the wheel and 90/100 on the cool side. Put white text on it (6.73:1). As text it scores 6.73:1 on white — safe at any size. Nearest name is Slate Blue, nearest Tailwind family is indigo.

hsl(229 74% 51%)rgb(39 74 222)Base step 600AA inkCool

At a glance

Every number on this page in one read: what #274ade is made of, how bright it looks, and which way it leans.

Hex
#274ade
Hue
229°
blue
Saturation
74%
vivid
Lightness
51%
balanced
Brightness
87%
HSV value
Perceived
38%
weighted brightness
Luminance
0.1060
WCAG relative
Temperature
Cool
90/100 cool
Color family
Blue
Tone
Vivid
Best ink
White
6.73:1
Closest name
Slate Blue
ΔE2000 8.7
Chroma
88.8
LCH, 0–130ish
OKLCH L
0.490
perceptual lightness
Tailwind
indigo
500 · ΔE 10.7
Web-safe
#3333CC
nearest of 216
Where it sits
Hue229° of 360°
Saturation74%
Lightness51%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #274ade.

Temperature
Warm ← → Cool90% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red4%
Green46%
Blue50%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#274ade
HEX (8-digit)#274adeff
RGBrgb(39, 74, 222)
RGBArgba(39, 74, 222, 1)
HSLhsl(229, 74%, 51%)
HSV / HSBhsv(229, 82%, 87%)
HWBhwb(229 15% 13%)
CMYKcmyk(82%, 67%, 0%, 13%)
LABlab(38.9 42.1 -78.2)
LCHlch(38.9 88.8 298.3)
OKLCHoklch(0.490 0.227 266.6)
XYZ (D65)xyz(16.47, 10.60, 70.27)
Decimal2575070
Display P3color(display-p3 0.153 0.290 0.871)
Web-safe#3333CC

Copy-ready code

every platformclick to select
/* CSS */
color: #274ade;
background-color: #274ade;
/* CSS custom property */
--brand: #274ade;
/* Tailwind (arbitrary) */
class="text-[#274ade] bg-[#274ade]"
/* SCSS */
$brand: #274ade;
/* SwiftUI */
Color(red: 0.153, green: 0.290, blue: 0.871)
/* UIKit */
UIColor(red: 0.153, green: 0.290, blue: 0.871, alpha: 1)
/* Android XML */
<color name="brand">#274ADE</color>
/* Android Compose */
Color(0xFF274ADE)
/* Flutter */
Color(0xFF274ADE)
/* Python / OpenCV (BGR) */
(222, 74, 39)
/* Python / PIL (RGB) */
(39, 74, 222)
/* Java AWT */
new Color(39, 74, 222)
/* .NET */
Color.FromArgb(255, 39, 74, 222)
/* OpenGL / Unity (0–1) */
(0.1529f, 0.2902f, 0.8706f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{39,74,222}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #274ade 85%, white);
border-color: color-mix(in oklab, #274ade 40%, transparent);
/* theme-aware in one line */
color: light-dark(#11236F, #D3D8EE);
/* relative colour syntax */
--hover: hsl(from #274ade h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F3F5FC;
  --brand-100: #E7EAF8;
  --brand-200: #C8D1F3;
  --brand-300: #9EADF0;
  --brand-400: #6D85E9;
  --brand-500: #3C5CE1;
  --brand-600: #274ade;
  --brand-700: #1B38B1;
  --brand-800: #162D8E;
  --brand-900: #142467;
  --brand-950: #0C1640;
  --brand: #274ade;
  --brand-ink: #ffffff;
  --brand-surface: #F4F5FA;
  --brand-border: #C0C8ED;
  --brand-hover: #1E3EC4;
  --brand-pressed: #1934A5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141724;
    --brand-ink: #D3D8EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F3F5FC',
        100: '#E7EAF8',
        200: '#C8D1F3',
        300: '#9EADF0',
        400: '#6D85E9',
        500: '#3C5CE1',
        600: '#274ade',
        700: '#1B38B1',
        800: '#162D8E',
        900: '#142467',
        950: '#0C1640',
        DEFAULT: '#274ade',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F3F5FC,
  '100': #E7EAF8,
  '200': #C8D1F3,
  '300': #9EADF0,
  '400': #6D85E9,
  '500': #3C5CE1,
  '600': #274ade,
  '700': #1B38B1,
  '800': #162D8E,
  '900': #142467,
  '950': #0C1640,
);
$brand-base: #274ade;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F3F5FC", "$type": "color" },
      "100": { "$value": "#E7EAF8", "$type": "color" },
      "200": { "$value": "#C8D1F3", "$type": "color" },
      "300": { "$value": "#9EADF0", "$type": "color" },
      "400": { "$value": "#6D85E9", "$type": "color" },
      "500": { "$value": "#3C5CE1", "$type": "color" },
      "600": { "$value": "#274ade", "$type": "color" },
      "700": { "$value": "#1B38B1", "$type": "color" },
      "800": { "$value": "#162D8E", "$type": "color" },
      "900": { "$value": "#142467", "$type": "color" },
      "950": { "$value": "#0C1640", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#ffffff on #274ade · 6.73:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.73:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.12:1
AA fail · AA large pass · AAA fail
Reading the other direction: #274ade as text scores 6.73:1 on white and 3.12:1 on black.
Best tinted ink on it, if plain black or white feels flat: #E9ECFC at 5.73:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#274ade · 6.73:1
AA on whitealready passes
#274ade
The quick fox
#2346DD · 7.02:1
AAA on white−1% L
#2346DD
The quick fox
#4F6CE4 · 4.60:1
AA on black+9% L
#4F6CE4
The quick fox
#7B91EB · 7.09:1
AAA on black+19% L
#7B91EB

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #274ADE is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#274ade on white: 6.73:1
AA ✓ pass · AA-large · AAA
Aa
#274ade on black: 3.12:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #274ade as text on that neutral, and that neutral as text on #274ade.

NeutralRatioBoth directions
White6.73:1AaAa
Slate 506.43:1AaAa
Slate 1006.14:1AaAa
Slate 2005.46:1AaAa
Slate 3004.53:1AaAa
Slate 4002.62:1AaAa
Slate 5001.41:1AaAa
Slate 6001.13:1AaAa
Slate 7001.54:1AaAa
Slate 8002.17:1AaAa
Slate 9002.65:1AaAa
Black3.12:1AaAa
Colour vision deficiency
true color
protanopia · #0064E3
deuteranopia · #0053DB
tritanopia · #00738E

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #274ade is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F3F5FC
#E7EAF8
#C8D1F3
#9EADF0
#6D85E9
#3C5CE1
#274ade
#1B38B1
#162D8E
#142467
#0C1640
Base = 600Lightest = 50 · #F3F5FCDarkest = 950 · #0C1640Text step on white = 500
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.057 266.6);
  --brand-100: oklch(0.94 0.091 266.6);
  --brand-200: oklch(0.88 0.136 266.6);
  --brand-300: oklch(0.80 0.177 266.6);
  --brand-400: oklch(0.72 0.209 266.6);
  --brand-500: oklch(0.64 0.227 266.6);
  --brand-600: oklch(0.56 0.227 266.6);
  --brand-700: oklch(0.48 0.213 266.6);
  --brand-800: oklch(0.40 0.191 266.6);
  --brand-900: oklch(0.32 0.159 266.6);
  --brand-950: oklch(0.24 0.125 266.6);
}

Colors that work with #274ade

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#ffffff
White wins here
Surface#F4F5FA
Tinted page background
Border#C0C8ED
Hairlines and dividers
Muted text#4B5A9B
Captions on the surface
Accent#B56F17
Second voice, not a rival
Dark variant#11236F
Hover, pressed, headers
Light variant#E9ECFC
Selected rows, tints
Dark surface#141724
Dark-mode background
Hover#1E3EC4
One step down in lightness
Pressed#1934A5
Two steps down
Disabled#ACB1CA
Chroma pulled out
Focus ring#2D52EC
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #274ade

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Body text and links on white
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Full-page backgrounds — tiring over long sessions
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

trustedcalmcompetentcorporate

The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. The mid lightness keeps it versatile in both themes.

Worth knowing

It is also the most crowded hue on the web. Distinctiveness has to come from your other choices.

Reads as
  • FormalityMedium
  • EnergyMedium-high
  • Weight49/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#DEBB27
Analogous left#27A6DE
Analogous right#5F27DE
Split-complement 1#DE5F27
Split-complement 2#A6DE27
Triadic 1#DE274A
Triadic 2#4ADE27
Tetradic#DE27A6
On the wheel
Base+30°−30°+120°+240°+180°229°

#274ade sits at 229°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red15.3%
Green29.0%
Blue87.1%
R · 0–255
39
0x27
G · 0–255
74
0x4a
B · 0–255
222
0xde

CMYK percentages

Cyan82.4%
Magenta66.7%
Yellow0.0%
Key (black)12.9%

Total ink coverage is 162%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#274ade text on a black background

contrast 3.12:1

Card sample

#274ade text on a white background

contrast 6.73:1

Card sample

#274ade on grey

6.14:1

#274ade on its own surface

6.18:1

#274ade on its dark surface

2.65:1

CSS3 live lab

Text font color

The quick brown fox

color: #274ade;
Background color
Panel with #274ade background
background-color: #274ade;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #274ade;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(39, 74, 222, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(39, 74, 222, 0.45);
Border & gradient
Gradient panel
border: 3px solid #274ade;
background: linear-gradient(135deg, #274ade, #7E27DE);
Gradient text

Gradient headline

background: linear-gradient(90deg, #274ade, #AC27DE);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #274ade;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #274ade;
caret-color: #274ade;
Left rule
Pull quote or callout
border-left: 4px solid #274ade;
Ring + tint
Selected chip
background: #E9ECFC;
box-shadow: inset 0 0 0 2px #274ade;
Conic badge
68%
background: conic-gradient(#274ade 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #274ade over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(39, 74, 222, 0.5)
rgb(39 74 222 / 50%)
#274ade80
hsl(229 74% 51% / 50%)
color-mix(in srgb, #274ade 50%, transparent)
Alpha8-digit hexFlat on white
10%#274ade1a#E9EDFC
20%#274ade33#D4DBF8
40%#274ade66#A9B7F2
60%#274ade99#7D92EB
80%#274adecc#526EE5

Gradients from #274ade

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #5C77E6, #274ade 45%, #11236F);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #274ade, #7D1FC8);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #274ade, #DEBB27);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #778DEA 0%, #274ade 45%, #11236F 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F5FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #53C4E5 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #8042E2 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #11236F 0%, transparent 65%), #274ade;

Monochromatic scale

Palettes built from #274ade

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#274ade in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyFinanceHealthcareEnterprise SaaS
Common UI roles
ButtonsLinksFocus statesCharts
Print note

Converts to four-color process without much drama. Proof it anyway.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Too dim on dark surfaces at 3.12:1 — lift it to #4F6CE4 for body text, or reserve it for fills.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#274ade, answered

What color is #274ade?

#274ade is a balanced vivid blue, closest to Slate Blue (ΔE2000 8.7). It sits at 229° on the hue wheel with 74% saturation and 51% lightness, which reads as cool.

What is the RGB value of #274ade?

rgb(39, 74, 222) — 39 red, 74 green and 222 blue out of 255, or 15.3% / 29% / 87.1% by channel.

What is #274ade in HSL and HSV?

hsl(229, 74%, 51%) and hsv(229, 82%, 87%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #274ade a light or a dark color?

It is a dark color. Relative luminance is 0.1060 and perceived brightness is 38%, so white text on it reaches 6.73:1.

Should I use black or white text on #274ade?

White. It scores 6.73:1 against #274ade, versus 3.12:1 for black — AA at any size.

Is #274ade accessible on a white background?

#274ade on white scores 6.73:1, which clears AA at every size but not AAA.

What is the complementary color of #274ade?

#DEBB27 sits directly opposite on the wheel. Softer options are the split-complements #DE5F27 and #A6DE27, which give the same contrast with far less vibration.

What colors go well with #274ade?

For interface work: #F4F5FA as the surface, #C0C8ED for borders, #4B5A9B for secondary text, #B56F17 as an accent and #11236F for hover and pressed states. For a palette, the analogous pair #27A6DE and #5F27DE stays calm, while #DEBB27 is the loudest partner.

What is #274ade in CMYK for printing?

cmyk(82%, 67%, 0%, 13%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #274ade warm or cool?

Cool — it scores 90 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #4727DE; nudged cooler, #2564E1.

Which Tailwind color is closest to #274ade?

The indigo family — its 500 step is #6366f1, ΔE2000 10.7 away. That is a visible difference, so define #274ade as a custom token rather than reaching for the built-in.

How do I use #274ade in Tailwind CSS?

Inline it as an arbitrary value with bg-[#274ade] or text-[#274ade], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #274ade with 50% opacity?

rgba(39, 74, 222, 0.5), or #274ade80 in eight-digit hex. Over white that composites to #93A5EF; over black, #14256F.

Is #274ade a web-safe color?

No. The nearest web-safe colour is #3333CC, ΔE2000 6.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #274ade mean?

As a blue, it reads trusted, calm, competent. The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #274ade?

The safest is same-hue elevation: linear-gradient(135deg, #5C77E6, #274ade 45%, #11236F). For more colour, a short hue run to #7D1FC8 keeps it rich without turning muddy.

Work with #274ade in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #274ade at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.