#173247
Closest named color: Gunmetal (#293241). oklch(30.7% 0.05 244), rgb(23, 50, 71).
Aa
White text reads best on this color (13.26:1).
About this color
#173247 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.050 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.025 away. White text reads best on it, at 13.26:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.58:1 |
| White text | 13.26:1 |
Values
| HEX | #173247 |
| RGB | rgb(23, 50, 71) |
| HSL | hsl(206, 51%, 18%) |
| OKLCH | oklch(30.7% 0.05 244) |
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 #173247 | 13.26:1 | AAA | Lc -102.7 | Preferred for body text |
| Black text on #173247 | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #173247 text on white | 13.26:1 | AAA | Lc 99.5 | Preferred for body text |
| #173247 text on black | 1.58:1 | 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
#C7DCEE
oklch(88.4% 0.034 244)
-
Step 300
300
#A0C6E5
oklch(81% 0.06 243.2)
-
Step 400
400
#6BA7D8
oklch(70.7% 0.095 244.4)
-
Step 500
500
#3D90CE
oklch(63% 0.123 244.3)
-
Step 600
600
#0F79BB
oklch(55.6% 0.134 244.4)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#065382
oklch(42.6% 0.102 244)
-
Step 900
900
#134568
oklch(37.6% 0.079 243.8)
-
Step 950
950 (this color)
#173247
oklch(30.7% 0.05 244)
#173247 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) | #293248 | 0.024 |
| Deuteranopia (no green cones) | #222E47 | 0.018 |
| Tritanopia (no blue cones) | #003739 | 0.039 |
| Achromatopsia (no color) | #303030 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173247
#173247
oklch(30.7% 0.05 244)
- #412A12
#412A12
oklch(30.7% 0.05 65.1)
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 #173247, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.025
- Midnight Green #073B4C ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.033
- Oxford Blue #1B263B ΔE 0.041
- Marine #042E60 ΔE 0.051
- Onyx #343A40 ΔE 0.054
Use #173247 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.