#128D7F
Closest named color: Dark Cyan (#008B8B). oklch(57.9% 0.1 182.5), rgb(18, 141, 127).
Aa
Black text reads best on this color (5.14:1).
About this color
#128D7F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.100 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.021 away. Black text reads best on it, at 5.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.14:1 |
| White text | 4.08:1 |
Values
| HEX | #128D7F |
| RGB | rgb(18, 141, 127) |
| HSL | hsl(173, 77%, 31%) |
| OKLCH | oklch(57.9% 0.1 182.5) |
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 #128D7F | 4.08:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #128D7F | 5.14:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #128D7F text on white | 4.08:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #128D7F text on black | 5.14:1 | AA | Lc -34.1 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEA
oklch(93.6% 0.013 179.5)
-
Step 200
200
#C8DFDA
oklch(88.5% 0.025 181.2)
-
Step 300
300
#A1CBC3
oklch(81% 0.046 182.2)
-
Step 400
400
#6BB0A4
oklch(70.8% 0.073 181.8)
-
Step 500
500
#3B9C8E
oklch(63.2% 0.093 182.1)
-
Step 600
600 (this color)
#128D7F
oklch(57.9% 0.1 182.5)
-
Step 700
700
#007165
oklch(49.2% 0.088 182.2)
-
Step 800
800
#005C52
oklch(42.6% 0.076 182.2)
-
Step 900
900
#114C44
oklch(37.7% 0.06 181.9)
-
Step 950
950
#0D2C28
oklch(26.9% 0.037 183.8)
#128D7F 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) | #86847E | 0.106 |
| Deuteranopia (no green cones) | #777980 | 0.101 |
| Tritanopia (no blue cones) | #009089 | 0.015 |
| Achromatopsia (no color) | #7E7E7E | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128D7F
#128D7F
oklch(57.9% 0.1 182.5)
- #AB6075
#AB6075
oklch(58.1% 0.1 2.7)
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 #128D7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.021
- Teal Green #0A9396 ΔE 0.035
- Dusty Teal #4C9085 ΔE 0.039
- Viridian #1E9167 ΔE 0.041
- Teal #008080 ΔE 0.042
- Blue Green #0F9B8E ΔE 0.042
- Sea #3C9992 ΔE 0.049
- Persian Green #2A9D8F ΔE 0.051
Use #128D7F 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.