#173147
Closest named color: Gunmetal (#293241). oklch(30.4% 0.051 246.1), rgb(23, 49, 71).
Aa
White text reads best on this color (13.40:1).
About this color
#173147 is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.051 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.026 away. White text reads best on it, at 13.40:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.56:1 |
| White text | 13.40:1 |
Values
| HEX | #173147 |
| RGB | rgb(23, 49, 71) |
| HSL | hsl(207, 51%, 18%) |
| OKLCH | oklch(30.4% 0.051 246.1) |
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 #173147 | 13.40:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #173147 | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #173147 text on white | 13.40:1 | AAA | Lc 99.7 | Preferred for body text |
| #173147 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
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A1C5E6
oklch(80.8% 0.061 246.3)
-
Step 400
400
#6CA7DA
oklch(70.8% 0.097 245.8)
-
Step 500
500
#408FD0
oklch(63% 0.125 246.4)
-
Step 600
600
#1678BD
oklch(55.5% 0.136 246.3)
-
Step 700
700
#0265A3
oklch(49.1% 0.126 246.1)
-
Step 800
800
#0C5384
oklch(42.8% 0.104 245.8)
-
Step 900
900
#15456A
oklch(37.8% 0.081 245.9)
-
Step 950
950 (this color)
#173147
oklch(30.4% 0.051 246.1)
#173147 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) | #273248 | 0.022 |
| Deuteranopia (no green cones) | #212D47 | 0.017 |
| Tritanopia (no blue cones) | #003639 | 0.040 |
| Achromatopsia (no color) | #2F2F2F | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173147
#173147
oklch(30.4% 0.051 246.1)
- #402910
#402910
oklch(30.3% 0.051 65.9)
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 #173147, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.026
- Space Cadet #2B2D42 ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.031
- Midnight Green #073B4C ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.036
- Oxford Blue #1B263B ΔE 0.038
- Marine #042E60 ΔE 0.050
- Dark #1B2431 ΔE 0.052
Use #173147 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.