#172666
Closest named color: Marine (#042E60). oklch(30.1% 0.114 268.5), rgb(23, 38, 102).
Aa
White text reads best on this color (13.94:1).
About this color
#172666 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.114 and its hue 268°. 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 13.94:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.50:1 |
| White text | 13.94:1 |
Values
| HEX | #172666 |
| RGB | rgb(23, 38, 102) |
| HSL | hsl(229, 63%, 25%) |
| OKLCH | oklch(30.1% 0.114 268.5) |
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 #172666 | 13.94:1 | AAA | Lc -103.3 | Preferred for body text |
| Black text on #172666 | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #172666 text on white | 13.94:1 | AAA | Lc 100.2 | Preferred for body text |
| #172666 text on black | 1.50:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#CAD9FF
oklch(88.6% 0.055 268.3)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#587DFF
oklch(63.1% 0.197 268.3)
-
Step 600
600
#3C5BFF
oklch(55.7% 0.244 268.4)
-
Step 700
700
#2B35FB
oklch(49.2% 0.279 268.4)
-
Step 800
800
#232FCA
oklch(42.7% 0.231 268.6)
-
Step 900
900
#1E2F9F
oklch(37.8% 0.18 268.5)
-
Step 950
950 (this color)
#172666
oklch(30.1% 0.114 268.5)
#172666 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) | #003068 | 0.030 |
| Deuteranopia (no green cones) | #002965 | 0.019 |
| Tritanopia (no blue cones) | #003642 | 0.090 |
| Achromatopsia (no color) | #2C2C2C | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #172666
#172666
oklch(30.1% 0.114 268.5)
- #3B2C00
#3B2C00
oklch(30.2% 0.062 88.4)
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 #172666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.028
- Midnight Blue #191970 ΔE 0.034
- Marine Blue #01386A ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.056
- Dark Royal Blue #02066F ΔE 0.071
- Dark Indigo #1F0954 ΔE 0.072
- Darkblue #030764 ΔE 0.073
- Deep Blue #040273 ΔE 0.074
Use #172666 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.