#173552
Closest named color: Prussian Blue (#1D3557). oklch(32.1% 0.063 249.7), rgb(23, 53, 82).
Aa
White text reads best on this color (12.59:1).
About this color
#173552 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.063 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.012 away. White text reads best on it, at 12.59:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.66:1 |
| White text | 12.59:1 |
Values
| HEX | #173552 |
| RGB | rgb(23, 53, 82) |
| HSL | hsl(209, 56%, 21%) |
| OKLCH | oklch(32.1% 0.063 249.7) |
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 #173552 | 12.59:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #173552 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #173552 text on white | 12.59:1 | AAA | Lc 98.4 | Preferred for body text |
| #173552 text on black | 1.66:1 | 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
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9CC5F0
oklch(80.9% 0.075 250)
-
Step 400
400
#63A6E8
oklch(70.8% 0.119 249.5)
-
Step 500
500
#2F8DE1
oklch(63% 0.153 249.8)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#084374
oklch(37.6% 0.101 250)
-
Step 950
950 (this color)
#173552
oklch(32.1% 0.063 249.7)
#173552 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) | #283653 | 0.022 |
| Deuteranopia (no green cones) | #203151 | 0.015 |
| Tritanopia (no blue cones) | #003C3F | 0.050 |
| Achromatopsia (no color) | #333333 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173552
#173552
oklch(32.1% 0.063 249.7)
- #482D07
#482D07
oklch(32.3% 0.064 70.2)
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 #173552, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.012
- Dark Blue Grey #1F3B4D ΔE 0.026
- Midnight Green #073B4C ΔE 0.027
- Gunmetal #293241 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.039
- Marine #042E60 ΔE 0.040
- Marine Blue #01386A ΔE 0.043
- Onyx #343A40 ΔE 0.055
Use #173552 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.