#128A7E
Closest named color: Dark Cyan (#008B8B). oklch(57.1% 0.098 184), rgb(18, 138, 126).
Aa
Black text reads best on this color (4.96:1).
About this color
#128A7E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.098 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.019 away. Black text reads best on it, at 4.96:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #128A7E |
| RGB | rgb(18, 138, 126) |
| HSL | hsl(174, 77%, 31%) |
| OKLCH | oklch(57.1% 0.098 184) |
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 #128A7E | 4.23:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #128A7E | 4.96:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #128A7E text on white | 4.23:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #128A7E text on black | 4.96:1 | AA | Lc -32.9 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C8DFDB
oklch(88.5% 0.025 184.2)
-
Step 300
300
#A2CAC4
oklch(80.8% 0.043 185.2)
-
Step 400
400
#6CAFA5
oklch(70.6% 0.07 183.8)
-
Step 500
500
#3D9B8F
oklch(63% 0.09 183.7)
-
Step 600
600 (this color)
#128A7E
oklch(57.1% 0.098 184)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#015C54
oklch(42.7% 0.075 184.6)
-
Step 900
900
#124C45
oklch(37.8% 0.059 183.4)
-
Step 950
950
#0E2C28
oklch(26.9% 0.036 183.6)
#128A7E 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) | #83817E | 0.105 |
| Deuteranopia (no green cones) | #74767F | 0.099 |
| Tritanopia (no blue cones) | #008D86 | 0.013 |
| Achromatopsia (no color) | #7B7B7B | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #128A7E
#128A7E
oklch(57.1% 0.098 184)
- #A75E71
#A75E71
oklch(57.1% 0.097 3.9)
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 #128A7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.019
- Teal #008080 ΔE 0.033
- Teal Green #0A9396 ΔE 0.039
- Dusty Teal #4C9085 ΔE 0.043
- Viridian #1E9167 ΔE 0.046
- Bluegreen #017A79 ΔE 0.050
- Blue Green #0F9B8E ΔE 0.051
- Teal Blue #01889F ΔE 0.054
Use #128A7E 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.