#174E40
Closest named color: Dark Blue Green (#005249). oklch(38.4% 0.062 172.8), rgb(23, 78, 64).
Aa
White text reads best on this color (9.54:1).
About this color
#174E40 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.062 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.017 away. White text reads best on it, at 9.54:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.20:1 |
| White text | 9.54:1 |
Values
| HEX | #174E40 |
| RGB | rgb(23, 78, 64) |
| HSL | hsl(165, 54%, 20%) |
| OKLCH | oklch(38.4% 0.062 172.8) |
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 #174E40 | 9.54:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #174E40 | 2.20:1 | Fails | Lc 12.1 | Not readable |
| #174E40 text on white | 9.54:1 | AAA | Lc 91.9 | Preferred for body text |
| #174E40 text on black | 2.20:1 | Fails | Lc -10.5 | 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDE9
oklch(93.6% 0.014 174.2)
-
Step 200
200
#C9DFD7
oklch(88.5% 0.026 171.9)
-
Step 300
300
#A3CBBE
oklch(81% 0.046 173.3)
-
Step 400
400
#6EB09C
oklch(70.7% 0.074 172.9)
-
Step 500
500
#409C84
oklch(63.1% 0.095 173.2)
-
Step 600
600
#10876D
oklch(55.7% 0.104 172.4)
-
Step 700
700
#00725B
oklch(49.2% 0.095 172.3)
-
Step 800
800
#075D4B
oklch(42.8% 0.08 173.1)
-
Step 900
900 (this color)
#174E40
oklch(38.4% 0.062 172.8)
-
Step 950
950
#0F2D24
oklch(27.1% 0.04 170.9)
#174E40 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) | #4B493F | 0.063 |
| Deuteranopia (no green cones) | #444341 | 0.062 |
| Tritanopia (no blue cones) | #004F4A | 0.017 |
| Achromatopsia (no color) | #454545 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #174E40
#174E40
oklch(38.4% 0.062 172.8)
- #5D3546
#5D3546
oklch(38.4% 0.062 353.4)
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 #174E40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.017
- Dark Teal #014D4E ΔE 0.026
- Dark Slate Gray #2F4F4F ΔE 0.037
- Evergreen #05472A ΔE 0.041
- Deep Teal #00555A ΔE 0.042
- Charcoal #264653 ΔE 0.051
- Pine Green #0A481E ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.058
Use #174E40 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.