#173A31
Closest named color: Pakistan Green (#283618). oklch(31.9% 0.044 174.2), rgb(23, 58, 49).
Aa
White text reads best on this color (12.45:1).
About this color
#173A31 is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.044 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Pakistan Green (#283618), ΔE 0.038 away. White text reads best on it, at 12.45:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Pakistan Green (#283618) |
| Black text | 1.68:1 |
| White text | 12.45:1 |
Values
| HEX | #173A31 |
| RGB | rgb(23, 58, 49) |
| HSL | hsl(165, 43%, 16%) |
| OKLCH | oklch(31.9% 0.044 174.2) |
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 #173A31 | 12.45:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #173A31 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #173A31 text on white | 12.45:1 | AAA | Lc 98.2 | Preferred for body text |
| #173A31 text on black | 1.68:1 | 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E0EDE9
oklch(93.5% 0.015 175.7)
-
Step 200
200
#C7E0D8
oklch(88.6% 0.029 174.4)
-
Step 300
300
#9ECCBE
oklch(80.9% 0.052 174.3)
-
Step 400
400
#65B29D
oklch(70.8% 0.083 174.2)
-
Step 500
500
#2D9E85
oklch(63.1% 0.106 174.5)
-
Step 600
600
#00876F
oklch(55.6% 0.106 174.3)
-
Step 700
700
#00715D
oklch(49% 0.093 174.7)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#054D3F
oklch(37.6% 0.069 174.7)
-
Step 950
950 (this color)
#173A31
oklch(31.9% 0.044 174.2)
#173A31 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) | #383631 | 0.046 |
| Deuteranopia (no green cones) | #333232 | 0.045 |
| Tritanopia (no blue cones) | #073B37 | 0.013 |
| Achromatopsia (no color) | #343434 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173A31
#173A31
oklch(31.9% 0.044 174.2)
- #442934
#442934
oklch(31.9% 0.044 353.8)
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 #173A31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pakistan Green #283618 ΔE 0.038
- Midnight Green #073B4C ΔE 0.048
- Onyx #343A40 ΔE 0.050
- Evergreen #05472A ΔE 0.051
- Gunmetal #293241 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.065
- Pine Green #0A481E ΔE 0.065
Use #173A31 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.