#18364E
Closest named color: Prussian Blue (#1D3557). oklch(32.2% 0.056 245), rgb(24, 54, 78).
Aa
White text reads best on this color (12.52:1).
About this color
#18364E is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.056 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.019 away. White text reads best on it, at 12.52:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.67:1 |
| White text | 12.52:1 |
Values
| HEX | #18364E |
| RGB | rgb(24, 54, 78) |
| HSL | hsl(207, 53%, 20%) |
| OKLCH | oklch(32.2% 0.056 245) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #18364E | 12.52:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #18364E | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #18364E text on white | 12.52:1 | AAA | Lc 98.3 | Preferred for body text |
| #18364E text on black | 1.67:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9DC6E9
oklch(80.9% 0.066 244.5)
-
Step 400
400
#64A7DE
oklch(70.6% 0.106 244.9)
-
Step 500
500
#3290D5
oklch(63.1% 0.135 244.9)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900
#0A456D
oklch(37.7% 0.089 245)
-
Step 950
950 (this color)
#18364E
oklch(32.2% 0.056 245)
#18364E with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #2B374F | 0.025 |
| Deuteranopia (no green cones) | #24314E | 0.020 |
| Tritanopia (no blue cones) | #003C3E | 0.044 |
| Achromatopsia (no color) | #343434 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18364E
#18364E
oklch(32.2% 0.056 245)
- #472D11
#472D11
oklch(32.3% 0.056 65.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #18364E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.019
- Dark Blue Grey #1F3B4D ΔE 0.020
- Midnight Green #073B4C ΔE 0.021
- Gunmetal #293241 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.037
- Marine #042E60 ΔE 0.048
- Onyx #343A40 ΔE 0.049
- Marine Blue #01386A ΔE 0.050
Use #18364E in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.