#173148
Closest named color: Gunmetal (#293241). oklch(30.4% 0.053 247.2), rgb(23, 49, 72).
Aa
White text reads best on this color (13.38:1).
About this color
#173148 is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.053 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.027 away. White text reads best on it, at 13.38:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.56:1 |
| White text | 13.38:1 |
Values
| HEX | #173148 |
| RGB | rgb(23, 49, 72) |
| HSL | hsl(208, 52%, 19%) |
| OKLCH | oklch(30.4% 0.053 247.2) |
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 #173148 | 13.38:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #173148 | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #173148 text on white | 13.38:1 | AAA | Lc 99.7 | Preferred for body text |
| #173148 text on black | 1.56:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A1C5E7
oklch(80.9% 0.062 247.1)
-
Step 400
400
#6CA6DC
oklch(70.7% 0.1 247.7)
-
Step 500
500
#408FD2
oklch(63.1% 0.127 247.2)
-
Step 600
600
#1678BF
oklch(55.7% 0.138 247)
-
Step 700
700
#0264A5
oklch(49% 0.129 247.4)
-
Step 800
800
#0B5286
oklch(42.7% 0.107 247.4)
-
Step 900
900
#15446B
oklch(37.6% 0.084 247.6)
-
Step 950
950 (this color)
#173148
oklch(30.4% 0.053 247.2)
#173148 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) | #273249 | 0.022 |
| Deuteranopia (no green cones) | #202D48 | 0.016 |
| Tritanopia (no blue cones) | #003639 | 0.041 |
| Achromatopsia (no color) | #2F2F2F | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173148
#173148
oklch(30.4% 0.053 247.2)
- #40290E
#40290E
oklch(30.3% 0.053 67.6)
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 #173148, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.027
- Space Cadet #2B2D42 ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.030
- Midnight Green #073B4C ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.036
- Oxford Blue #1B263B ΔE 0.039
- Marine #042E60 ΔE 0.048
- Dark #1B2431 ΔE 0.053
Use #173148 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.