Skip to content
blue · cool

#135dcd

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

Token name suggestion: Shadow Cobalt

RGB
19, 93, 205
HSL
216°, 83%, 44%
CMYK
91, 55, 0, 20
Luminance
0.1237

#135dcd is a dark electric blue, 216° on the wheel and 97/100 on the cool side. Put white text on it (6.04:1). As text it scores 6.04:1 on white — safe at any size. Nearest name is Royal Blue, nearest Tailwind family is indigo.

hsl(216 83% 44%)rgb(19 93 205)Base step 700AA inkCool

At a glance

Every number on this page in one read: what #135dcd is made of, how bright it looks, and which way it leans.

Hex
#135dcd
Hue
216°
blue
Saturation
83%
electric
Lightness
44%
dark
Brightness
80%
HSV value
Perceived
39%
weighted brightness
Luminance
0.1237
WCAG relative
Temperature
Cool
97/100 cool
Color family
Blue
Tone
Electric
Best ink
White
6.04:1
Closest name
Royal Blue
ΔE2000 6
Chroma
67.5
LCH, 0–130ish
OKLCH L
0.506
perceptual lightness
Tailwind
indigo
500 · ΔE 10.9
Web-safe
#0066CC
nearest of 216
Where it sits
Hue216° of 360°
Saturation83%
Lightness44%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #135dcd.

Temperature
Warm ← → Cool97% 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
Red1%
Green63%
Blue36%

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

Every format

HEX#135dcd
HEX (8-digit)#135dcdff
RGBrgb(19, 93, 205)
RGBArgba(19, 93, 205, 1)
HSLhsl(216, 83%, 44%)
HSV / HSBhsv(216, 91%, 80%)
HWBhwb(216 7% 20%)
CMYKcmyk(91%, 55%, 0%, 20%)
LABlab(41.8 22.2 -63.7)
LCHlch(41.8 67.5 289.2)
OKLCHoklch(0.506 0.187 259.7)
XYZ (D65)xyz(15.20, 12.37, 59.33)
Decimal1269197
Display P3color(display-p3 0.075 0.365 0.804)
Web-safe#0066CC

Copy-ready code

every platformclick to select
/* CSS */
color: #135dcd;
background-color: #135dcd;
/* CSS custom property */
--brand: #135dcd;
/* Tailwind (arbitrary) */
class="text-[#135dcd] bg-[#135dcd]"
/* SCSS */
$brand: #135dcd;
/* SwiftUI */
Color(red: 0.075, green: 0.365, blue: 0.804)
/* UIKit */
UIColor(red: 0.075, green: 0.365, blue: 0.804, alpha: 1)
/* Android XML */
<color name="brand">#135DCD</color>
/* Android Compose */
Color(0xFF135DCD)
/* Flutter */
Color(0xFF135DCD)
/* Python / OpenCV (BGR) */
(205, 93, 19)
/* Python / PIL (RGB) */
(19, 93, 205)
/* Java AWT */
new Color(19, 93, 205)
/* .NET */
Color.FromArgb(255, 19, 93, 205)
/* OpenGL / Unity (0–1) */
(0.0745f, 0.3647f, 0.8039f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{19,93,205}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #135dcd 85%, white);
border-color: color-mix(in oklab, #135dcd 40%, transparent);
/* theme-aware in one line */
color: light-dark(#0B3575, #D3DEEE);
/* relative colour syntax */
--hover: hsl(from #135dcd 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: #E6EEFA;
  --brand-200: #C6D9F6;
  --brand-300: #98BDF5;
  --brand-400: #659DF1;
  --brand-500: #327CEC;
  --brand-600: #1566E0;
  --brand-700: #135dcd;
  --brand-800: #0E4495;
  --brand-900: #0E346C;
  --brand-950: #092043;
  --brand: #135dcd;
  --brand-ink: #ffffff;
  --brand-surface: #F4F7FA;
  --brand-border: #C0D2ED;
  --brand-hover: #104EAC;
  --brand-pressed: #0D3F8C;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141A24;
    --brand-ink: #D3DEEE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F2F6FC',
        100: '#E6EEFA',
        200: '#C6D9F6',
        300: '#98BDF5',
        400: '#659DF1',
        500: '#327CEC',
        600: '#1566E0',
        700: '#135dcd',
        800: '#0E4495',
        900: '#0E346C',
        950: '#092043',
        DEFAULT: '#135dcd',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F2F6FC,
  '100': #E6EEFA,
  '200': #C6D9F6,
  '300': #98BDF5,
  '400': #659DF1,
  '500': #327CEC,
  '600': #1566E0,
  '700': #135dcd,
  '800': #0E4495,
  '900': #0E346C,
  '950': #092043,
);
$brand-base: #135dcd;
$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": "#E6EEFA", "$type": "color" },
      "200": { "$value": "#C6D9F6", "$type": "color" },
      "300": { "$value": "#98BDF5", "$type": "color" },
      "400": { "$value": "#659DF1", "$type": "color" },
      "500": { "$value": "#327CEC", "$type": "color" },
      "600": { "$value": "#1566E0", "$type": "color" },
      "700": { "$value": "#135dcd", "$type": "color" },
      "800": { "$value": "#0E4495", "$type": "color" },
      "900": { "$value": "#0E346C", "$type": "color" },
      "950": { "$value": "#092043", "$type": "color" }
    },
    "brandInk": { "$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 #135dcd · 6.04:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.04:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.47:1
AA fail · AA large pass · AAA fail
Reading the other direction: #135dcd as text scores 6.04:1 on white and 3.47:1 on black.
Best tinted ink on it, if plain black or white feels flat: #E8F0FD at 5.27:1.

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
#135dcd · 6.04:1
AA on whitealready passes
#135dcd
The quick fox
#1152B6 · 7.23:1
AAA on white−5% L
#1152B6
The quick fox
#1F70EA · 4.56:1
AA on black+8% L
#1F70EA
The quick fox
#5B96F0 · 7.07:1
AAA on black+21% L
#5B96F0

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #135DCD 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
#135dcd on white: 6.04:1
AA ✓ pass · AA-large · AAA
Aa
#135dcd on black: 3.47:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #135dcd as text on that neutral, and that neutral as text on #135dcd.

NeutralRatioBoth directions
White6.04:1AaAa
Slate 505.78:1AaAa
Slate 1005.52:1AaAa
Slate 2004.90:1AaAa
Slate 3004.07:1AaAa
Slate 4002.36:1AaAa
Slate 5001.27:1AaAa
Slate 6001.25:1AaAa
Slate 7001.71:1AaAa
Slate 8002.42:1AaAa
Slate 9002.95:1AaAa
Black3.47:1AaAa
Colour vision deficiency
true color
protanopia · #006BD1
deuteranopia · #005BCB
tritanopia · #00798C

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. #135dcd is pinned to step 700; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F2F6FC
#E6EEFA
#C6D9F6
#98BDF5
#659DF1
#327CEC
#1566E0
#135dcd
#0E4495
#0E346C
#092043
Base = 700Lightest = 50 · #F2F6FCDarkest = 950 · #092043Text step on white = 600
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 0.047 259.7);
  --brand-100: oklch(0.94 0.075 259.7);
  --brand-200: oklch(0.88 0.112 259.7);
  --brand-300: oklch(0.80 0.146 259.7);
  --brand-400: oklch(0.72 0.172 259.7);
  --brand-500: oklch(0.64 0.187 259.7);
  --brand-600: oklch(0.56 0.187 259.7);
  --brand-700: oklch(0.48 0.176 259.7);
  --brand-800: oklch(0.40 0.157 259.7);
  --brand-900: oklch(0.32 0.131 259.7);
  --brand-950: oklch(0.24 0.103 259.7);
}

Colors that work with #135dcd

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#C0D2ED
Hairlines and dividers
Muted text#4B6B9B
Captions on the surface
Accent#D1530F
Second voice, not a rival
Dark variant#0B3575
Hover, pressed, headers
Light variant#E8F0FD
Selected rows, tints
Dark surface#141A24
Dark-mode background
Hover#104EAC
One step down in lightness
Pressed#0D3F8C
Two steps down
Disabled#95A4BB
Chroma pulled out
Focus ring#0963EC
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 #135dcd

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
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Full-page backgrounds — tiring over long sessions
  • Black text placed on it
  • 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 low lightness adds weight and formality.

Worth knowing

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

Reads as
  • FormalityHigh
  • EnergyHigh
  • Weight56/100
  • 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#CD8313
Analogous left#13BACD
Analogous right#2613CD
Split-complement 1#CD2613
Split-complement 2#BACD13
Triadic 1#CD135D
Triadic 2#5DCD13
Tetradic#CD13BA
On the wheel
Base+30°−30°+120°+240°+180°216°

#135dcd sits at 216°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red7.5%
Green36.5%
Blue80.4%
R · 0–255
19
0x13
G · 0–255
93
0x5d
B · 0–255
205
0xcd

CMYK percentages

Cyan90.7%
Magenta54.6%
Yellow0.0%
Key (black)19.6%

Total ink coverage is 165%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#135dcd text on a black background

contrast 3.47:1

Card sample

#135dcd text on a white background

contrast 6.04:1

Card sample

#135dcd on grey

5.52:1

#135dcd on its own surface

5.62:1

#135dcd on its dark surface

2.89:1

CSS3 live lab

Text font color

The quick brown fox

color: #135dcd;
Background color
Panel with #135dcd background
background-color: #135dcd;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #135dcd;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(19, 93, 205, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(19, 93, 205, 0.45);
Border & gradient
Gradient panel
border: 3px solid #135dcd;
background: linear-gradient(135deg, #135dcd, #4513CD);
Gradient text

Gradient headline

background: linear-gradient(90deg, #135dcd, #7313CD);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #135dcd;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #135dcd;
caret-color: #135dcd;
Left rule
Pull quote or callout
border-left: 4px solid #135dcd;
Ring + tint
Selected chip
background: #E8F0FD;
box-shadow: inset 0 0 0 2px #135dcd;
Conic badge
68%
background: conic-gradient(#135dcd 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #135dcd 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(19, 93, 205, 0.5)
rgb(19 93 205 / 50%)
#135dcd80
hsl(216 83% 44% / 50%)
color-mix(in srgb, #135dcd 50%, transparent)
Alpha8-digit hexFlat on white
10%#135dcd1a#E7EFFA
20%#135dcd33#D0DFF5
40%#135dcd66#A1BEEB
60%#135dcd99#719EE1
80%#135dcdcc#427DD7

Gradients from #135dcd

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, #317CEC, #135dcd 45%, #0B3575);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #135dcd, #4910B1);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #135dcd, #CD8313);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #4D8DEE 0%, #135dcd 45%, #0B3575 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%, #28E7EB 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #3D16E9 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #0B3575 0%, transparent 65%), #135dcd;

Monochromatic scale

Palettes built from #135dcd

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.

#135dcd 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

Too dim on dark surfaces at 3.47:1 — lift it to #1F70EA 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.

#135dcd, answered

What color is #135dcd?

#135dcd is a dark electric blue, closest to Royal Blue (ΔE2000 6). It sits at 216° on the hue wheel with 83% saturation and 44% lightness, which reads as cool.

What is the RGB value of #135dcd?

rgb(19, 93, 205) — 19 red, 93 green and 205 blue out of 255, or 7.5% / 36.5% / 80.4% by channel.

What is #135dcd in HSL and HSV?

hsl(216, 83%, 44%) and hsv(216, 91%, 80%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #135dcd a light or a dark color?

It is a dark color. Relative luminance is 0.1237 and perceived brightness is 39%, so white text on it reaches 6.04:1.

Should I use black or white text on #135dcd?

White. It scores 6.04:1 against #135dcd, versus 3.47:1 for black — AA at any size.

Is #135dcd accessible on a white background?

#135dcd on white scores 6.04:1, which clears AA at every size but not AAA.

What is the complementary color of #135dcd?

#CD8313 sits directly opposite on the wheel. Softer options are the split-complements #CD2613 and #BACD13, which give the same contrast with far less vibration.

What colors go well with #135dcd?

For interface work: #F4F7FA as the surface, #C0D2ED for borders, #4B6B9B for secondary text, #D1530F as an accent and #0B3575 for hover and pressed states. For a palette, the analogous pair #13BACD and #2613CD stays calm, while #CD8313 is the loudest partner.

What is #135dcd in CMYK for printing?

cmyk(91%, 55%, 0%, 20%). 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 #135dcd warm or cool?

Cool — it scores 97 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #1319CD; nudged cooler, #0F58B8.

Which Tailwind color is closest to #135dcd?

The indigo family — its 500 step is #6366f1, ΔE2000 10.9 away. That is a visible difference, so define #135dcd as a custom token rather than reaching for the built-in.

How do I use #135dcd in Tailwind CSS?

Inline it as an arbitrary value with bg-[#135dcd] or text-[#135dcd], 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 #135dcd with 50% opacity?

rgba(19, 93, 205, 0.5), or #135dcd80 in eight-digit hex. Over white that composites to #89AEE6; over black, #0A2F67.

Is #135dcd a web-safe color?

No. The nearest web-safe colour is #0066CC, ΔE2000 3.7 away. The palette only matters for legacy displays and some email clients now.

What does the color #135dcd 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 #135dcd?

The safest is same-hue elevation: linear-gradient(135deg, #317CEC, #135dcd 45%, #0B3575). For more colour, a short hue run to #4910B1 keeps it rich without turning muddy.

Work with #135dcd in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #135dcd at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.