#174D40
Closest named color: Dark Blue Green (#005249). oklch(38.1% 0.061 173.9), rgb(23, 77, 64).
Aa
White text reads best on this color (9.66:1).
About this color
#174D40 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.061 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.019 away. White text reads best on it, at 9.66:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.17:1 |
| White text | 9.66:1 |
Values
| HEX | #174D40 |
| RGB | rgb(23, 77, 64) |
| HSL | hsl(166, 54%, 20%) |
| OKLCH | oklch(38.1% 0.061 173.9) |
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 #174D40 | 9.66:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #174D40 | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #174D40 text on white | 9.66:1 | AAA | Lc 92.2 | Preferred for body text |
| #174D40 text on black | 2.17:1 | Fails | Lc -10.2 | 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 900.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E1EDE9
oklch(93.6% 0.014 174.2)
-
Step 200
200
#C9DFD8
oklch(88.5% 0.025 174.7)
-
Step 300
300
#A3CBBE
oklch(81% 0.046 173.3)
-
Step 400
400
#6EB09D
oklch(70.7% 0.073 173.9)
-
Step 500
500
#429C85
oklch(63.2% 0.093 173.8)
-
Step 600
600
#14866F
oklch(55.6% 0.101 174.4)
-
Step 700
700
#00725D
oklch(49.3% 0.094 174)
-
Step 800
800
#0A5D4C
oklch(42.8% 0.078 174)
-
Step 900
900 (this color)
#174D40
oklch(38.1% 0.061 173.9)
-
Step 950
950
#0F2D25
oklch(27.1% 0.039 173.2)
#174D40 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) | #4A483F | 0.062 |
| Deuteranopia (no green cones) | #434241 | 0.061 |
| Tritanopia (no blue cones) | #004E49 | 0.016 |
| Achromatopsia (no color) | #444444 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174D40
#174D40
oklch(38.1% 0.061 173.9)
- #5C3445
#5C3445
oklch(38% 0.062 353.5)
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 #174D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.019
- Dark Teal #014D4E ΔE 0.025
- Dark Slate Gray #2F4F4F ΔE 0.037
- Evergreen #05472A ΔE 0.040
- Deep Teal #00555A ΔE 0.043
- Charcoal #264653 ΔE 0.049
- Pine Green #0A481E ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.056
Use #174D40 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.