#172D52
Closest named color: Marine (#042E60). oklch(30% 0.073 260.2), rgb(23, 45, 82).
Aa
White text reads best on this color (13.69:1).
About this color
#172D52 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.073 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.028 away. White text reads best on it, at 13.69:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.53:1 |
| White text | 13.69:1 |
Values
| HEX | #172D52 |
| RGB | rgb(23, 45, 82) |
| HSL | hsl(218, 56%, 21%) |
| OKLCH | oklch(30% 0.073 260.2) |
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 #172D52 | 13.69:1 | AAA | Lc -103.2 | Preferred for body text |
| Black text on #172D52 | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #172D52 text on white | 13.69:1 | AAA | Lc 100.1 | Preferred for body text |
| #172D52 text on black | 1.53:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A0C2F9
oklch(80.9% 0.087 259.9)
-
Step 400
400
#6DA0F6
oklch(70.7% 0.138 260.4)
-
Step 500
500
#4585F2
oklch(63% 0.177 260.3)
-
Step 600
600
#256CE1
oklch(55.6% 0.192 260.2)
-
Step 700
700
#1859C3
oklch(49% 0.178 260.2)
-
Step 800
800
#164A9E
oklch(42.8% 0.147 259.9)
-
Step 900
900
#193F7D
oklch(37.8% 0.114 259.8)
-
Step 950
950 (this color)
#172D52
oklch(30% 0.073 260.2)
#172D52 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) | #1C3053 | 0.012 |
| Deuteranopia (no green cones) | #132B51 | 0.008 |
| Tritanopia (no blue cones) | #00353B | 0.059 |
| Achromatopsia (no color) | #2D2D2D | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172D52
#172D52
oklch(30% 0.073 260.2)
- #3E2A00
#3E2A00
oklch(30.1% 0.062 80.6)
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 #172D52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.044
- Gunmetal #293241 ΔE 0.046
- Marine Blue #01386A ΔE 0.050
- Midnight Green #073B4C ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.051
Use #172D52 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.