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blue · cool

#286feb

a balanced, electric blue · cool · closest name: Royal Blue

Token name suggestion: Atlas Sapphire

RGB
40, 111, 235
HSL
218°, 83%, 54%
CMYK
83, 53, 0, 8
Luminance
0.1782

#286feb is a balanced electric blue, 218° on the wheel and 95/100 on the cool side. Put white text on it (4.60:1). As text it scores 4.60:1 on white — safe at any size. Nearest name is Royal Blue, nearest Tailwind family is blue.

hsl(218 83% 54%)rgb(40 111 235)Base step 500AA inkCool

At a glance

Every number on this page in one read: what #286feb is made of, how bright it looks, and which way it leans.

Hex
#286feb
Hue
218°
blue
Saturation
83%
electric
Lightness
54%
balanced
Brightness
92%
HSV value
Perceived
46%
weighted brightness
Luminance
0.1782
WCAG relative
Temperature
Cool
95/100 cool
Color family
Blue
Tone
Electric
Best ink
White
4.60:1
Closest name
Royal Blue
ΔE2000 3.4
Chroma
72.5
LCH, 0–130ish
OKLCH L
0.571
perceptual lightness
Tailwind
blue
500 · ΔE 6.7
Web-safe
#3366FF
nearest of 216
Where it sits
Hue218° of 360°
Saturation83%
Lightness54%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #286feb.

Temperature
Warm ← → Cool95% 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
Red3%
Green64%
Blue34%

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

Every format

HEX#286feb
HEX (8-digit)#286febff
RGBrgb(40, 111, 235)
RGBArgba(40, 111, 235, 1)
HSLhsl(218, 83%, 54%)
HSV / HSBhsv(218, 83%, 92%)
HWBhwb(218 16% 8%)
CMYKcmyk(83%, 53%, 0%, 8%)
LABlab(49.3 23.5 -68.6)
LCHlch(49.3 72.5 288.9)
OKLCHoklch(0.571 0.201 260.8)
XYZ (D65)xyz(21.55, 17.82, 80.88)
Decimal2650091
Display P3color(display-p3 0.157 0.435 0.922)
Web-safe#3366FF

Copy-ready code

every platformclick to select
/* CSS */
color: #286feb;
background-color: #286feb;
/* CSS custom property */
--brand: #286feb;
/* Tailwind (arbitrary) */
class="text-[#286feb] bg-[#286feb]"
/* SCSS */
$brand: #286feb;
/* SwiftUI */
Color(red: 0.157, green: 0.435, blue: 0.922)
/* UIKit */
UIColor(red: 0.157, green: 0.435, blue: 0.922, alpha: 1)
/* Android XML */
<color name="brand">#286FEB</color>
/* Android Compose */
Color(0xFF286FEB)
/* Flutter */
Color(0xFF286FEB)
/* Python / OpenCV (BGR) */
(235, 111, 40)
/* Python / PIL (RGB) */
(40, 111, 235)
/* Java AWT */
new Color(40, 111, 235)
/* .NET */
Color.FromArgb(255, 40, 111, 235)
/* OpenGL / Unity (0–1) */
(0.1569f, 0.4353f, 0.9216f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{40,111,235}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #286feb 85%, white);
border-color: color-mix(in oklab, #286feb 40%, transparent);
/* theme-aware in one line */
color: light-dark(#0B3175, #D3DDEE);
/* relative colour syntax */
--hover: hsl(from #286feb 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: #F2F6FC;
  --brand-100: #E6EDFA;
  --brand-200: #C6D7F6;
  --brand-300: #98BAF5;
  --brand-400: #6598F1;
  --brand-500: #286feb;
  --brand-600: #155FE0;
  --brand-700: #114FBB;
  --brand-800: #0E3F95;
  --brand-900: #0E306C;
  --brand-950: #091E43;
  --brand: #286feb;
  --brand-ink: #ffffff;
  --brand-surface: #F4F7FA;
  --brand-border: #C0D0ED;
  --brand-hover: #145CDB;
  --brand-pressed: #114FBA;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141A24;
    --brand-ink: #D3DDEE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F2F6FC',
        100: '#E6EDFA',
        200: '#C6D7F6',
        300: '#98BAF5',
        400: '#6598F1',
        500: '#286feb',
        600: '#155FE0',
        700: '#114FBB',
        800: '#0E3F95',
        900: '#0E306C',
        950: '#091E43',
        DEFAULT: '#286feb',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F2F6FC,
  '100': #E6EDFA,
  '200': #C6D7F6,
  '300': #98BAF5,
  '400': #6598F1,
  '500': #286feb,
  '600': #155FE0,
  '700': #114FBB,
  '800': #0E3F95,
  '900': #0E306C,
  '950': #091E43,
);
$brand-base: #286feb;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F2F6FC", "$type": "color" },
      "100": { "$value": "#E6EDFA", "$type": "color" },
      "200": { "$value": "#C6D7F6", "$type": "color" },
      "300": { "$value": "#98BAF5", "$type": "color" },
      "400": { "$value": "#6598F1", "$type": "color" },
      "500": { "$value": "#286feb", "$type": "color" },
      "600": { "$value": "#155FE0", "$type": "color" },
      "700": { "$value": "#114FBB", "$type": "color" },
      "800": { "$value": "#0E3F95", "$type": "color" },
      "900": { "$value": "#0E306C", "$type": "color" },
      "950": { "$value": "#091E43", "$type": "color" }
    },
    "brandInk": { "$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 #286feb · 4.60:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 4.60:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 4.56:1
AA pass · AA large pass · AAA fail
Reading the other direction: #286feb as text scores 4.60:1 on white and 4.56:1 on black.
Best tinted ink on it, if plain black or white feels flat: #E8EFFD at 3.99:1.

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
#286feb · 4.60:1
AA on whitealready passes
#286feb
The quick fox
#1251BF · 7.11:1
AAA on white−13% L
#1251BF
The quick fox
#286feb · 4.56:1
AA on blackalready passes
#286feb
The quick fox
#6597F1 · 7.25:1
AAA on black+13% L
#6597F1

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #286FEB 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
#286feb on white: 4.60:1
AA ✓ pass · AA-large · AAA
Aa
#286feb on black: 4.56:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #286feb as text on that neutral, and that neutral as text on #286feb.

NeutralRatioBoth directions
White4.60:1AaAa
Slate 504.40:1AaAa
Slate 1004.20:1AaAa
Slate 2003.73:1AaAa
Slate 3003.10:1AaAa
Slate 4001.79:1AaAa
Slate 5001.03:1AaAa
Slate 6001.65:1AaAa
Slate 7002.25:1AaAa
Slate 8003.18:1AaAa
Slate 9003.88:1AaAa
Black4.56:1AaAa
Colour vision deficiency
true color
protanopia · #017EEF
deuteranopia · #006DE9
tritanopia · #008EA2

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. #286feb is pinned to step 500; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F2F6FC
#E6EDFA
#C6D7F6
#98BAF5
#6598F1
#286feb
#155FE0
#114FBB
#0E3F95
#0E306C
#091E43
Base = 500Lightest = 50 · #F2F6FCDarkest = 950 · #091E43Text 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 0.050 260.8);
  --brand-100: oklch(0.94 0.080 260.8);
  --brand-200: oklch(0.88 0.120 260.8);
  --brand-300: oklch(0.80 0.156 260.8);
  --brand-400: oklch(0.72 0.184 260.8);
  --brand-500: oklch(0.64 0.201 260.8);
  --brand-600: oklch(0.56 0.201 260.8);
  --brand-700: oklch(0.48 0.188 260.8);
  --brand-800: oklch(0.40 0.168 260.8);
  --brand-900: oklch(0.32 0.140 260.8);
  --brand-950: oklch(0.24 0.110 260.8);
}

Colors that work with #286feb

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#F4F7FA
Tinted page background
Border#C0D0ED
Hairlines and dividers
Muted text#4B689B
Captions on the surface
Accent#BF520D
Second voice, not a rival
Dark variant#0B3175
Hover, pressed, headers
Light variant#E8EFFD
Selected rows, tints
Dark surface#141A24
Dark-mode background
Hover#145CDB
One step down in lightness
Pressed#114FBA
Two steps down
Disabled#B4BECF
Chroma pulled out
Focus ring#3078F7
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 #286feb

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

Works well for
  • Body text and links on white
  • Text and icons on dark surfaces
  • 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.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. 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
  • FormalityLow
  • EnergyHigh
  • Weight46/100
  • 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#EBA428
Analogous left#28D0EB
Analogous right#4328EB
Split-complement 1#EB4328
Split-complement 2#D0EB28
Triadic 1#EB286F
Triadic 2#6FEB28
Tetradic#EB28D0
On the wheel
Base+30°−30°+120°+240°+180°218°

#286feb sits at 218°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red15.7%
Green43.5%
Blue92.2%
R · 0–255
40
0x28
G · 0–255
111
0x6f
B · 0–255
235
0xeb

CMYK percentages

Cyan83.0%
Magenta52.8%
Yellow0.0%
Key (black)7.8%

Total ink coverage is 144%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#286feb text on a black background

contrast 4.56:1

Card sample

#286feb text on a white background

contrast 4.60:1

Card sample

#286feb on grey

4.20:1

#286feb on its own surface

4.28:1

#286feb on its dark surface

3.79:1

CSS3 live lab

Text font color

The quick brown fox

color: #286feb;
Background color
Panel with #286feb background
background-color: #286feb;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #286feb;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(40, 111, 235, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(40, 111, 235, 0.45);
Border & gradient
Gradient panel
border: 3px solid #286feb;
background: linear-gradient(135deg, #286feb, #6328EB);
Gradient text

Gradient headline

background: linear-gradient(90deg, #286feb, #9428EB);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #286feb;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #286feb;
caret-color: #286feb;
Left rule
Pull quote or callout
border-left: 4px solid #286feb;
Ring + tint
Selected chip
background: #E8EFFD;
box-shadow: inset 0 0 0 2px #286feb;
Conic badge
68%
background: conic-gradient(#286feb 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #286feb 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(40, 111, 235, 0.5)
rgb(40 111 235 / 50%)
#286feb80
hsl(218 83% 54% / 50%)
color-mix(in srgb, #286feb 50%, transparent)
Alpha8-digit hexFlat on white
10%#286feb1a#EAF1FD
20%#286feb33#D4E2FB
40%#286feb66#A9C5F7
60%#286feb99#7EA9F3
80%#286febcc#538CEF

Gradients from #286feb

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, #6094F0, #286feb 45%, #0B3175);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #286feb, #6315E0);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #286feb, #EBA428);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #7CA7F3 0%, #286feb 45%, #0B3175 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F7FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #57E7EF 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #6944EE 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #0B3175 0%, transparent 65%), #286feb;

Monochromatic scale

Palettes built from #286feb

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.

#286feb 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

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

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

In dark mode

Usable as-is on a dark surface at 4.56:1.

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.

#286feb, answered

What color is #286feb?

#286feb is a balanced electric blue, closest to Royal Blue (ΔE2000 3.4). It sits at 218° on the hue wheel with 83% saturation and 54% lightness, which reads as cool.

What is the RGB value of #286feb?

rgb(40, 111, 235) — 40 red, 111 green and 235 blue out of 255, or 15.7% / 43.5% / 92.2% by channel.

What is #286feb in HSL and HSV?

hsl(218, 83%, 54%) and hsv(218, 83%, 92%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #286feb a light or a dark color?

It is a dark color. Relative luminance is 0.1782 and perceived brightness is 46%, so white text on it reaches 4.60:1.

Should I use black or white text on #286feb?

White. It scores 4.60:1 against #286feb, versus 4.56:1 for black — AA at any size.

Is #286feb accessible on a white background?

#286feb on white scores 4.60:1, which clears AA at every size but not AAA.

What is the complementary color of #286feb?

#EBA428 sits directly opposite on the wheel. Softer options are the split-complements #EB4328 and #D0EB28, which give the same contrast with far less vibration.

What colors go well with #286feb?

For interface work: #F4F7FA as the surface, #C0D0ED for borders, #4B689B for secondary text, #BF520D as an accent and #0B3175 for hover and pressed states. For a palette, the analogous pair #28D0EB and #4328EB stays calm, while #EBA428 is the loudest partner.

What is #286feb in CMYK for printing?

cmyk(83%, 53%, 0%, 8%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #286feb warm or cool?

Cool — it scores 95 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #2928EB; nudged cooler, #136BE7.

Which Tailwind color is closest to #286feb?

The blue family — its 500 step is #3b82f6, ΔE2000 6.7 away. That is a visible difference, so define #286feb as a custom token rather than reaching for the built-in.

How do I use #286feb in Tailwind CSS?

Inline it as an arbitrary value with bg-[#286feb] or text-[#286feb], 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 #286feb with 50% opacity?

rgba(40, 111, 235, 0.5), or #286feb80 in eight-digit hex. Over white that composites to #94B7F5; over black, #143876.

Is #286feb a web-safe color?

No. The nearest web-safe colour is #3366FF, ΔE2000 4.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #286feb 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 #286feb?

The safest is same-hue elevation: linear-gradient(135deg, #6094F0, #286feb 45%, #0B3175). For more colour, a short hue run to #6315E0 keeps it rich without turning muddy.

Work with #286feb in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #286feb at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.