#173667
Closest named color: Marine Blue (#01386A). oklch(33.8% 0.094 259.3), rgb(23, 54, 103).
Aa
White text reads best on this color (11.93:1).
About this color
#173667 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.094 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.014 away. White text reads best on it, at 11.93:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.75:1 |
| White text | 11.93:1 |
Values
| HEX | #173667 |
| RGB | rgb(23, 54, 103) |
| HSL | hsl(217, 63%, 25%) |
| OKLCH | oklch(33.8% 0.094 259.3) |
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 #173667 | 11.93:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #173667 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #173667 text on white | 11.93:1 | AAA | Lc 97.0 | Preferred for body text |
| #173667 text on black | 1.75:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A6C2EF
oklch(80.9% 0.071 259.8)
-
Step 400
400
#76A1E6
oklch(70.6% 0.112 259.6)
-
Step 500
500
#5288DF
oklch(63% 0.144 259.5)
-
Step 600
600
#3670CD
oklch(55.6% 0.156 259.5)
-
Step 700
700
#285DB1
oklch(49% 0.145 259.4)
-
Step 800
800
#224D8F
oklch(42.7% 0.119 258.9)
-
Step 900
900 (this color)
#173667
oklch(33.8% 0.094 259.3)
-
Step 950
950
#142643
oklch(27% 0.059 259.5)
#173667 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) | #1D3B69 | 0.017 |
| Deuteranopia (no green cones) | #0D3366 | 0.013 |
| Tritanopia (no blue cones) | #004249 | 0.075 |
| Achromatopsia (no color) | #373737 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173667
#173667
oklch(33.8% 0.094 259.3)
- #4B3200
#4B3200
oklch(33.8% 0.07 78.2)
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 #173667, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.014
- Prussian Blue #1D3557 ΔE 0.028
- Marine #042E60 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.053
- Midnight Green #073B4C ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.064
- Gunmetal #293241 ΔE 0.068
Use #173667 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.