#172E70
Closest named color: Marine Blue (#01386A). oklch(32.7% 0.118 265.6), rgb(23, 46, 112).
Aa
White text reads best on this color (12.64:1).
About this color
#172E70 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.118 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.033 away. White text reads best on it, at 12.64:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.66:1 |
| White text | 12.64:1 |
Values
| HEX | #172E70 |
| RGB | rgb(23, 46, 112) |
| HSL | hsl(224, 66%, 26%) |
| OKLCH | oklch(32.7% 0.118 265.6) |
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 #172E70 | 12.64:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #172E70 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #172E70 text on white | 12.64:1 | AAA | Lc 98.2 | Preferred for body text |
| #172E70 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 900.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A5C0FB
oklch(80.9% 0.089 265.4)
-
Step 400
400
#769DF9
oklch(70.7% 0.142 265.5)
-
Step 500
500
#5481F5
oklch(63% 0.18 265.6)
-
Step 600
600
#3B67E4
oklch(55.6% 0.196 265.6)
-
Step 700
700
#2E55C6
oklch(49.1% 0.182 265.5)
-
Step 800
800
#2646A0
oklch(42.6% 0.151 265.5)
-
Step 900
900 (this color)
#172E70
oklch(32.7% 0.118 265.6)
-
Step 950
950
#15244B
oklch(27.1% 0.075 265.8)
#172E70 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) | #003772 | 0.026 |
| Deuteranopia (no green cones) | #002F6F | 0.016 |
| Tritanopia (no blue cones) | #003E4A | 0.092 |
| Achromatopsia (no color) | #333333 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172E70
#172E70
oklch(32.7% 0.118 265.6)
- #443100
#443100
oklch(32.6% 0.067 84.9)
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 #172E70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.033
- Marine #042E60 ΔE 0.033
- Midnight Blue #191970 ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.060
- Royal #0C1793 ΔE 0.074
- Dark Blue Grey #1F3B4D ΔE 0.080
- Midnight Green #073B4C ΔE 0.082
Use #172E70 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.