Palettes / Colors / #123789
#123789 — Blue
#123789 is a blue color we call Blue, closest to the named color MidnightBlue (#191970). It belongs to the blue family.
Color name
Closest CSS keyword: midnightblue (#191970) — not an exact match. CSS midnightblue gives you #191970, a different color; use #123789 when you need this exact shade.
Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.
#123789 is a cool blue color associated with trust, calm and professionalism. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.
Its strongest partner is its complement #876212; it also sits naturally between #127287 and #271287. In the palettes below you can see it working alongside real color combinations from our collection.
Color values
| HEX | #123789 |
|---|---|
| RGB | 18, 55, 137 |
| HSL | 221°, 77%, 30% |
| HSV | 221°, 87%, 54% |
| CMYK | 87%, 60%, 0%, 46% |
| XYZ | 6.13, 4.67, 24.24 |
| Yxy | 4.67, 0.1750, 0.1332 |
| CIE-Lab | 25.76, 20.51, -49.21 |
| Hunter Lab | 21.60, 14.23, -54.61 |
RGB & CMYK percentages
Red 7% · Green 22% · Blue 54%
Cyan 87% · Magenta 60% · Yellow 0% · Key 46%
CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.
Previews
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CSS code for #123789
.text { color: #123789; }
.background { background-color: #123789; }
.border { border: 3px solid #123789; }
.text-rgb { color: rgb(18, 55, 137); }
.text-hsl { color: hsl(221, 77%, 30%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #123789; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(18, 55, 137, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #123789; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(18, 55, 137, 0.8); }
HTML: <p style="color:#123789">Text here</p> · <div style="background-color:#123789">Div content here</div>
Shades of #123789
Tints of #123789
Tones of #123789
Color harmonies
Complementary — #876212:
Analogous:
Triadic:
Contrast & accessibility
| Against white text | 10.86:1 AAA |
|---|---|
| Against black text | 1.93:1 Fails |
Best text color on #123789: #FFFFFF.
Semi-transparent (opacity) text on #123789
Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:
Smaller body text shows the effect best.
Blended color: · Contrast against #123789: ·
How #123789 looks with color blindness
Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:
Closest design-system colors
The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:
Palettes with a similar color
These palettes use a close neighbour of #123789 rather than the exact color:
Similar colors
The closest colors that actually appear in our palette collection — click any to open its page:
Browse neighbouring colors
Frequently asked questions
What color is #123789?
#123789 is Blue, a blue color (RGB 18, 55, 137). Its closest standard named color is MidnightBlue.
What is the RGB and HSL of #123789?
#123789 is RGB 18, 55, 137 — HSL 221°, 77%, 30% — CMYK 87%, 60%, 0%, 46%.
What colors go with #123789?
Its complement is #876212; analogous partners are #127287 and #271287. It also appears in 6+ palettes in our collection.
Can I use #123789 for text?
White text on #123789 has a contrast ratio of 10.86:1 (passes WCAG AA); black text gives 1.93:1.