#18344F
Closest named color: Prussian Blue (#1D3557). oklch(31.7% 0.059 249.4), rgb(24, 52, 79).
Aa
White text reads best on this color (12.78:1).
About this color
#18344F is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.059 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.016 away. White text reads best on it, at 12.78:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.78:1 |
Values
| HEX | #18344F |
| RGB | rgb(24, 52, 79) |
| HSL | hsl(209, 53%, 20%) |
| OKLCH | oklch(31.7% 0.059 249.4) |
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 #18344F | 12.78:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #18344F | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #18344F text on white | 12.78:1 | AAA | Lc 98.7 | Preferred for body text |
| #18344F text on black | 1.64:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF3
oklch(88.5% 0.04 249.5)
-
Step 300
300
#9EC5ED
oklch(80.9% 0.071 249.4)
-
Step 400
400
#67A6E4
oklch(70.8% 0.112 249.3)
-
Step 500
500
#378EDC
oklch(63.2% 0.144 249.2)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#0F4471
oklch(37.8% 0.094 249.2)
-
Step 950
950 (this color)
#18344F
oklch(31.7% 0.059 249.4)
#18344F 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) | #283550 | 0.021 |
| Deuteranopia (no green cones) | #21304E | 0.015 |
| Tritanopia (no blue cones) | #003A3E | 0.046 |
| Achromatopsia (no color) | #323232 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18344F
#18344F
oklch(31.7% 0.059 249.4)
- #452C0B
#452C0B
oklch(31.7% 0.059 69.7)
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 #18344F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.016
- Midnight Green #073B4C ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.027
- Gunmetal #293241 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.035
- Marine #042E60 ΔE 0.042
- Marine Blue #01386A ΔE 0.048
- Oxford Blue #1B263B ΔE 0.052
Use #18344F 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.