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blue · cool

#34709a

a dark, vivid blue · cool · closest name: Steel Blue

Token name suggestion: Forest Harbour

RGB
52, 112, 154
HSL
205°, 50%, 40%
CMYK
66, 27, 0, 40
Luminance
0.1465

#34709a is a dark vivid blue, 205° on the wheel and 98/100 on the cool side. Put white text on it (5.34:1). As text it scores 5.34:1 on white — safe at any size. Nearest name is Steel Blue, nearest Tailwind family is slate.

hsl(205 50% 40%)rgb(52 112 154)Base step 700AA inkCool

At a glance

Every number on this page in one read: what #34709a is made of, how bright it looks, and which way it leans.

Hex
#34709a
Hue
205°
blue
Saturation
50%
vivid
Lightness
40%
dark
Brightness
60%
HSV value
Perceived
41%
weighted brightness
Luminance
0.1465
WCAG relative
Temperature
Cool
98/100 cool
Color family
Blue
Tone
Vivid
Best ink
White
5.34:1
Closest name
Steel Blue
ΔE2000 7.4
Chroma
29.1
LCH, 0–130ish
OKLCH L
0.524
perceptual lightness
Tailwind
slate
500 · ΔE 9.8
Web-safe
#336699
nearest of 216
Where it sits
Hue205° of 360°
Saturation50%
Lightness40%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #34709a.

Temperature
Warm ← → Cool98% 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
Red5%
Green79%
Blue16%

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

Every format

HEX#34709a
HEX (8-digit)#34709aff
RGBrgb(52, 112, 154)
RGBArgba(52, 112, 154, 1)
HSLhsl(205, 50%, 40%)
HSV / HSBhsv(205, 66%, 60%)
HWBhwb(205 20% 40%)
CMYKcmyk(66%, 27%, 0%, 40%)
LABlab(45.1 -5.7 -28.5)
LCHlch(45.1 29.1 258.7)
OKLCHoklch(0.524 0.091 241.9)
XYZ (D65)xyz(13.04, 14.65, 32.71)
Decimal3436698
Display P3color(display-p3 0.204 0.439 0.604)
Web-safe#336699

Copy-ready code

every platformclick to select
/* CSS */
color: #34709a;
background-color: #34709a;
/* CSS custom property */
--brand: #34709a;
/* Tailwind (arbitrary) */
class="text-[#34709a] bg-[#34709a]"
/* SCSS */
$brand: #34709a;
/* SwiftUI */
Color(red: 0.204, green: 0.439, blue: 0.604)
/* UIKit */
UIColor(red: 0.204, green: 0.439, blue: 0.604, alpha: 1)
/* Android XML */
<color name="brand">#34709A</color>
/* Android Compose */
Color(0xFF34709A)
/* Flutter */
Color(0xFF34709A)
/* Python / OpenCV (BGR) */
(154, 112, 52)
/* Python / PIL (RGB) */
(52, 112, 154)
/* Java AWT */
new Color(52, 112, 154)
/* .NET */
Color.FromArgb(255, 52, 112, 154)
/* OpenGL / Unity (0–1) */
(0.2039f, 0.4392f, 0.6039f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{52,112,154}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #34709a 85%, white);
border-color: color-mix(in oklab, #34709a 40%, transparent);
/* theme-aware in one line */
color: light-dark(#20455F, #D3E3EE);
/* relative colour syntax */
--hover: hsl(from #34709a 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: #F4F8FA;
  --brand-100: #EAF1F6;
  --brand-200: #CFE0EC;
  --brand-300: #ABCCE3;
  --brand-400: #81B2D5;
  --brand-500: #5799C6;
  --brand-600: #3E85B7;
  --brand-700: #34709a;
  --brand-800: #29597A;
  --brand-900: #214259;
  --brand-950: #152938;
  --brand: #34709a;
  --brand-ink: #ffffff;
  --brand-surface: #F4F8FA;
  --brand-border: #C2DAEA;
  --brand-hover: #2B5D7F;
  --brand-pressed: #224965;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141E24;
    --brand-ink: #D3E3EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4F8FA',
        100: '#EAF1F6',
        200: '#CFE0EC',
        300: '#ABCCE3',
        400: '#81B2D5',
        500: '#5799C6',
        600: '#3E85B7',
        700: '#34709a',
        800: '#29597A',
        900: '#214259',
        950: '#152938',
        DEFAULT: '#34709a',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4F8FA,
  '100': #EAF1F6,
  '200': #CFE0EC,
  '300': #ABCCE3,
  '400': #81B2D5,
  '500': #5799C6,
  '600': #3E85B7,
  '700': #34709a,
  '800': #29597A,
  '900': #214259,
  '950': #152938,
);
$brand-base: #34709a;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4F8FA", "$type": "color" },
      "100": { "$value": "#EAF1F6", "$type": "color" },
      "200": { "$value": "#CFE0EC", "$type": "color" },
      "300": { "$value": "#ABCCE3", "$type": "color" },
      "400": { "$value": "#81B2D5", "$type": "color" },
      "500": { "$value": "#5799C6", "$type": "color" },
      "600": { "$value": "#3E85B7", "$type": "color" },
      "700": { "$value": "#34709a", "$type": "color" },
      "800": { "$value": "#29597A", "$type": "color" },
      "900": { "$value": "#214259", "$type": "color" },
      "950": { "$value": "#152938", "$type": "color" }
    },
    "brandInk": { "$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 #34709a · 5.34:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 5.34:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.93:1
AA fail · AA large pass · AAA fail
Reading the other direction: #34709a as text scores 5.34:1 on white and 3.93:1 on black.
Best tinted ink on it, if plain black or white feels flat: #ECF3F9 at 4.77:1.

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
#34709a · 5.34:1
AA on whitealready passes
#34709a
The quick fox
#2B5D7F · 7.06:1
AAA on white−7% L
#2B5D7F
The quick fox
#397BA9 · 4.58:1
AA on black+4% L
#397BA9
The quick fox
#5D9CC8 · 7.05:1
AAA on black+17% L
#5D9CC8

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #34709A 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
#34709a on white: 5.34:1
AA ✓ pass · AA-large · AAA
Aa
#34709a on black: 3.93:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #34709a as text on that neutral, and that neutral as text on #34709a.

NeutralRatioBoth directions
White5.34:1AaAa
Slate 505.11:1AaAa
Slate 1004.88:1AaAa
Slate 2004.33:1AaAa
Slate 3003.60:1AaAa
Slate 4002.08:1AaAa
Slate 5001.12:1AaAa
Slate 6001.42:1AaAa
Slate 7001.94:1AaAa
Slate 8002.74:1AaAa
Slate 9003.34:1AaAa
Black3.93:1AaAa
Colour vision deficiency
true color
protanopia · #5D709C
deuteranopia · #4F6699
tritanopia · #007A7E

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. #34709a 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.

#F4F8FA
#EAF1F6
#CFE0EC
#ABCCE3
#81B2D5
#5799C6
#3E85B7
#34709a
#29597A
#214259
#152938
Base = 700Lightest = 50 · #F4F8FADarkest = 950 · #152938Text step on white = 700
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 0.023 241.9);
  --brand-100: oklch(0.94 0.036 241.9);
  --brand-200: oklch(0.88 0.055 241.9);
  --brand-300: oklch(0.80 0.071 241.9);
  --brand-400: oklch(0.72 0.084 241.9);
  --brand-500: oklch(0.64 0.091 241.9);
  --brand-600: oklch(0.56 0.091 241.9);
  --brand-700: oklch(0.48 0.086 241.9);
  --brand-800: oklch(0.40 0.076 241.9);
  --brand-900: oklch(0.32 0.064 241.9);
  --brand-950: oklch(0.24 0.050 241.9);
}

Colors that work with #34709a

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#F4F8FA
Tinted page background
Border#C2DAEA
Hairlines and dividers
Muted text#4B7A9B
Captions on the surface
Accent#9E4230
Second voice, not a rival
Dark variant#20455F
Hover, pressed, headers
Light variant#ECF3F9
Selected rows, tints
Dark surface#141E24
Dark-mode background
Hover#2B5D7F
One step down in lightness
Pressed#224965
Two steps down
Disabled#8AA3B4
Chroma pulled out
Focus ring#2E7DB5
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 #34709a

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.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. 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
  • EnergyMedium-high
  • Weight60/100
  • 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#9A5E34
Analogous left#349A91
Analogous right#343D9A
Split-complement 1#9A343D
Split-complement 2#9A9134
Triadic 1#9A3470
Triadic 2#709A34
Tetradic#91349A
On the wheel
Base+30°−30°+120°+240°+180°205°

#34709a sits at 205°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red20.4%
Green43.9%
Blue60.4%
R · 0–255
52
0x34
G · 0–255
112
0x70
B · 0–255
154
0x9a

CMYK percentages

Cyan66.2%
Magenta27.3%
Yellow0.0%
Key (black)39.6%

Total ink coverage is 133%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#34709a text on a black background

contrast 3.93:1

Card sample

#34709a text on a white background

contrast 5.34:1

Card sample

#34709a on grey

4.88:1

#34709a on its own surface

5.00:1

#34709a on its dark surface

3.17:1

CSS3 live lab

Text font color

The quick brown fox

color: #34709a;
Background color
Panel with #34709a background
background-color: #34709a;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #34709a;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(52, 112, 154, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(52, 112, 154, 0.45);
Border & gradient
Gradient panel
border: 3px solid #34709a;
background: linear-gradient(135deg, #34709a, #3C349A);
Gradient text

Gradient headline

background: linear-gradient(90deg, #34709a, #56349A);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #34709a;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #34709a;
caret-color: #34709a;
Left rule
Pull quote or callout
border-left: 4px solid #34709a;
Ring + tint
Selected chip
background: #ECF3F9;
box-shadow: inset 0 0 0 2px #34709a;
Conic badge
68%
background: conic-gradient(#34709a 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #34709a 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(52, 112, 154, 0.5)
rgb(52 112 154 / 50%)
#34709a80
hsl(205 50% 40% / 50%)
color-mix(in srgb, #34709a 50%, transparent)
Alpha8-digit hexFlat on white
10%#34709a1a#EBF1F5
20%#34709a33#D6E2EB
40%#34709a66#AEC6D7
60%#34709a99#85A9C2
80%#34709acc#5D8DAE

Gradients from #34709a

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, #4A90C2, #34709a 45%, #20455F);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #34709a, #3A2C83);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #34709a, #9A5E34);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #609EC9 0%, #34709a 45%, #20455F 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F8FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #42BFAA 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #3C3CB1 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #20455F 0%, transparent 65%), #34709a;

Monochromatic scale

Palettes built from #34709a

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.

#34709a 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 3.93:1 — lift it to #397BA9 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.

#34709a, answered

What color is #34709a?

#34709a is a dark vivid blue, closest to Steel Blue (ΔE2000 7.4). It sits at 205° on the hue wheel with 50% saturation and 40% lightness, which reads as cool.

What is the RGB value of #34709a?

rgb(52, 112, 154) — 52 red, 112 green and 154 blue out of 255, or 20.4% / 43.9% / 60.4% by channel.

What is #34709a in HSL and HSV?

hsl(205, 50%, 40%) and hsv(205, 66%, 60%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #34709a a light or a dark color?

It is a dark color. Relative luminance is 0.1465 and perceived brightness is 41%, so white text on it reaches 5.34:1.

Should I use black or white text on #34709a?

White. It scores 5.34:1 against #34709a, versus 3.93:1 for black — AA at any size.

Is #34709a accessible on a white background?

#34709a on white scores 5.34:1, which clears AA at every size but not AAA.

What is the complementary color of #34709a?

#9A5E34 sits directly opposite on the wheel. Softer options are the split-complements #9A343D and #9A9134, which give the same contrast with far less vibration.

What colors go well with #34709a?

For interface work: #F4F8FA as the surface, #C2DAEA for borders, #4B7A9B for secondary text, #9E4230 as an accent and #20455F for hover and pressed states. For a palette, the analogous pair #349A91 and #343D9A stays calm, while #9A5E34 is the loudest partner.

What is #34709a in CMYK for printing?

cmyk(66%, 27%, 0%, 40%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #34709a warm or cool?

Cool — it scores 98 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #34959A; nudged cooler, #2C5B89.

Which Tailwind color is closest to #34709a?

The slate family — its 500 step is #64748b, ΔE2000 9.8 away. That is a visible difference, so define #34709a as a custom token rather than reaching for the built-in.

How do I use #34709a in Tailwind CSS?

Inline it as an arbitrary value with bg-[#34709a] or text-[#34709a], 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 #34709a with 50% opacity?

rgba(52, 112, 154, 0.5), or #34709a80 in eight-digit hex. Over white that composites to #9AB8CD; over black, #1A384D.

Is #34709a a web-safe color?

No. The nearest web-safe colour is #336699, ΔE2000 4.5 away. The palette only matters for legacy displays and some email clients now.

What does the color #34709a 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 #34709a?

The safest is same-hue elevation: linear-gradient(135deg, #4A90C2, #34709a 45%, #20455F). For more colour, a short hue run to #3A2C83 keeps it rich without turning muddy.

Work with #34709a in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #34709a at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.