#163A5B
Closest named color: Prussian Blue (#1D3557). oklch(34% 0.071 249), rgb(22, 58, 91).
Aa
White text reads best on this color (11.72:1).
About this color
#163A5B is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.071 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 11.72:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.79:1 |
| White text | 11.72:1 |
Values
| HEX | #163A5B |
| RGB | rgb(22, 58, 91) |
| HSL | hsl(209, 61%, 22%) |
| OKLCH | oklch(34% 0.071 249) |
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 #163A5B | 11.72:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #163A5B | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #163A5B text on white | 11.72:1 | AAA | Lc 96.7 | Preferred for body text |
| #163A5B text on black | 1.79:1 | 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 900.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A7C4E2
oklch(80.9% 0.053 249.4)
-
Step 400
400
#76A5D4
oklch(70.6% 0.086 249.1)
-
Step 500
500
#518EC9
oklch(63.1% 0.11 249.2)
-
Step 600
600
#3377B5
oklch(55.5% 0.118 249)
-
Step 700
700
#25649C
oklch(49.1% 0.11 248.9)
-
Step 800
800
#20527F
oklch(42.8% 0.092 248.8)
-
Step 900
900 (this color)
#163A5B
oklch(34% 0.071 249)
-
Step 950
950
#14283C
oklch(27.1% 0.046 249.9)
#163A5B 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) | #2B3C5C | 0.026 |
| Deuteranopia (no green cones) | #21355A | 0.018 |
| Tritanopia (no blue cones) | #004246 | 0.054 |
| Achromatopsia (no color) | #383838 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #163A5B
#163A5B
oklch(34% 0.071 249)
- #4F3003
#4F3003
oklch(33.9% 0.071 69.6)
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 #163A5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.016
- Dark Blue Grey #1F3B4D ΔE 0.027
- Marine Blue #01386A ΔE 0.031
- Midnight Green #073B4C ΔE 0.031
- Marine #042E60 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.047
- Gunmetal #293241 ΔE 0.049
- Charcoal #264653 ΔE 0.050
Use #163A5B 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.