#178388
Closest named color: Teal (#008080). oklch(55.7% 0.09 199.9), rgb(23, 131, 136).
Aa
Black text reads best on this color (4.63:1).
About this color
#178388 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.090 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.016 away. Black text reads best on it, at 4.63:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.63:1 |
| White text | 4.52:1 |
Values
| HEX | #178388 |
| RGB | rgb(23, 131, 136) |
| HSL | hsl(183, 71%, 31%) |
| OKLCH | oklch(55.7% 0.09 199.9) |
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 #178388 | 4.52:1 | AA | Lc -76.5 | Fine for body text |
| Black text on #178388 | 4.63:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #178388 text on white | 4.52:1 | AA | Lc 71.0 | Content text, not long reading |
| #178388 text on black | 4.63:1 | AA | Lc -30.7 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECED
oklch(93.5% 0.012 203.5)
-
Step 200
200
#C9DEDF
oklch(88.5% 0.022 200.2)
-
Step 300
300
#A3C9CB
oklch(80.9% 0.04 200.3)
-
Step 400
400
#6FADB0
oklch(70.7% 0.064 199.7)
-
Step 500
500
#42999D
oklch(63.2% 0.083 199.4)
-
Step 600
600 (this color)
#178388
oklch(55.7% 0.09 199.9)
-
Step 700
700
#016F73
oklch(49.2% 0.083 199.2)
-
Step 800
800
#0C5A5E
oklch(42.7% 0.069 200.4)
-
Step 900
900
#164A4D
oklch(37.7% 0.054 200.6)
-
Step 950
950
#0F2B2D
oklch(26.9% 0.034 201.6)
#178388 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) | #797D88 | 0.092 |
| Deuteranopia (no green cones) | #697289 | 0.084 |
| Tritanopia (no blue cones) | #008884 | 0.019 |
| Achromatopsia (no color) | #767676 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178388
#178388
oklch(55.7% 0.09 199.9)
- #A15D5E
#A15D5E
oklch(55.6% 0.089 19.4)
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 #178388, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.016
- Dark Cyan #008B8B ΔE 0.023
- Bluegreen #017A79 ΔE 0.034
- Ocean #017B92 ΔE 0.034
- Teal Blue #01889F ΔE 0.035
- Deep Aqua #08787F ΔE 0.035
- Teal Green #0A9396 ΔE 0.047
- Deep Turquoise #017374 ΔE 0.054
Use #178388 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.