#178579
Closest named color: Teal (#008080). oklch(55.6% 0.094 183.5), rgb(23, 133, 121).
Aa
Black text reads best on this color (4.66:1).
About this color
#178579 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.094 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.023 away. Black text reads best on it, at 4.66:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.66:1 |
| White text | 4.49:1 |
Values
| HEX | #178579 |
| RGB | rgb(23, 133, 121) |
| HSL | hsl(173, 71%, 31%) |
| OKLCH | oklch(55.6% 0.094 183.5) |
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 #178579 | 4.49:1 | AA large text | Lc -76.3 | Fine for body text |
| Black text on #178579 | 4.66:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #178579 text on white | 4.49:1 | AA large text | Lc 70.8 | Content text, not long reading |
| #178579 text on black | 4.66:1 | AA | Lc -30.9 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C9DEDB
oklch(88.4% 0.023 186.4)
-
Step 300
300
#A3CAC3
oklch(80.9% 0.043 183.1)
-
Step 400
400
#6FAFA5
oklch(70.8% 0.068 183.4)
-
Step 500
500
#439A8F
oklch(63% 0.085 184.1)
-
Step 600
600 (this color)
#178579
oklch(55.6% 0.094 183.5)
-
Step 700
700
#017066
oklch(49% 0.086 184.1)
-
Step 800
800
#0C5C53
oklch(42.8% 0.072 183)
-
Step 900
900
#164B45
oklch(37.6% 0.056 184.6)
-
Step 950
950
#0F2C28
oklch(27% 0.036 183.4)
#178579 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) | #7E7D79 | 0.099 |
| Deuteranopia (no green cones) | #70727A | 0.095 |
| Tritanopia (no blue cones) | #008881 | 0.013 |
| Achromatopsia (no color) | #777777 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178579
#178579
oklch(55.6% 0.094 183.5)
- #A15B6E
#A15B6E
oklch(55.7% 0.094 3.2)
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 #178579, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.023
- Dark Cyan #008B8B ΔE 0.028
- Bluegreen #017A79 ΔE 0.036
- Deep Aqua #08787F ΔE 0.046
- Teal Green #0A9396 ΔE 0.052
- Viridian #1E9167 ΔE 0.053
- Dusty Teal #4C9085 ΔE 0.054
- Dark Aquamarine #017371 ΔE 0.057
Use #178579 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.