#173168
Closest named color: Marine Blue (#01386A). oklch(32.7% 0.102 263), rgb(23, 49, 104).
Aa
White text reads best on this color (12.53:1).
About this color
#173168 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.102 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.022 away. White text reads best on it, at 12.53:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.67:1 |
| White text | 12.53:1 |
Values
| HEX | #173168 |
| RGB | rgb(23, 49, 104) |
| HSL | hsl(221, 64%, 25%) |
| OKLCH | oklch(32.7% 0.102 263) |
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 #173168 | 12.53:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #173168 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #173168 text on white | 12.53:1 | AAA | Lc 98.1 | Preferred for body text |
| #173168 text on black | 1.67:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF6
oklch(88.6% 0.042 263)
-
Step 300
300
#A7C1F3
oklch(80.9% 0.077 263.3)
-
Step 400
400
#789FED
oklch(70.7% 0.123 263.3)
-
Step 500
500
#5585E7
oklch(63% 0.157 263)
-
Step 600
600
#3B6DD5
oklch(55.7% 0.169 262.8)
-
Step 700
700
#2E5AB9
oklch(49.1% 0.158 263.1)
-
Step 800
800
#264A95
oklch(42.6% 0.13 262.8)
-
Step 900
900 (this color)
#173168
oklch(32.7% 0.102 263)
-
Step 950
950
#152546
oklch(27% 0.065 263.2)
#173168 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) | #10376A | 0.017 |
| Deuteranopia (no green cones) | #003067 | 0.018 |
| Tritanopia (no blue cones) | #003E47 | 0.081 |
| Achromatopsia (no color) | #343434 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173168
#173168
oklch(32.7% 0.102 263)
- #453100
#453100
oklch(32.7% 0.067 83.7)
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 #173168, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.022
- Marine #042E60 ΔE 0.024
- Prussian Blue #1D3557 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.057
- Midnight Blue #191970 ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.064
- Midnight Green #073B4C ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.070
Use #173168 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.