#173A34
Closest named color: Midnight Green (#073B4C). oklch(32% 0.042 180.8), rgb(23, 58, 52).
Aa
White text reads best on this color (12.41:1).
About this color
#173A34 is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.042 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.042 away. White text reads best on it, at 12.41:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.69:1 |
| White text | 12.41:1 |
Values
| HEX | #173A34 |
| RGB | rgb(23, 58, 52) |
| HSL | hsl(170, 43%, 16%) |
| OKLCH | oklch(32% 0.042 180.8) |
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 #173A34 | 12.41:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #173A34 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #173A34 text on white | 12.41:1 | AAA | Lc 98.1 | Preferred for body text |
| #173A34 text on black | 1.69:1 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E0EDEA
oklch(93.6% 0.014 180.7)
-
Step 200
200
#C6DFDA
oklch(88.4% 0.027 182.3)
-
Step 300
300
#9ECCC2
oklch(81% 0.05 180.2)
-
Step 400
400
#64B1A3
oklch(70.7% 0.08 180.8)
-
Step 500
500
#2C9D8D
oklch(63% 0.101 181.3)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#044D43
oklch(37.7% 0.067 180.1)
-
Step 950
950 (this color)
#173A34
oklch(32% 0.042 180.8)
#173A34 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) | #373734 | 0.044 |
| Deuteranopia (no green cones) | #323235 | 0.044 |
| Tritanopia (no blue cones) | #053B38 | 0.012 |
| Achromatopsia (no color) | #343434 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #173A34
#173A34
oklch(32% 0.042 180.8)
- #452A32
#452A32
oklch(32.1% 0.042 0.5)
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 #173A34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.042
- Pakistan Green #283618 ΔE 0.043
- Onyx #343A40 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.047
- Gunmetal #293241 ΔE 0.047
- Evergreen #05472A ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.063
Use #173A34 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.