#428E7B
Closest named color: Dusty Teal (#4C9085). oklch(59.3% 0.081 174.7), rgb(66, 142, 123).
Aa
Black text reads best on this color (5.38:1).
About this color
#428E7B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.081 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Teal (#4C9085), ΔE 0.019 away. Black text reads best on it, at 5.38:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dusty Teal (#4C9085) |
| Black text | 5.38:1 |
| White text | 3.89:1 |
Values
| HEX | #428E7B |
| RGB | rgb(66, 142, 123) |
| HSL | hsl(165, 37%, 41%) |
| OKLCH | oklch(59.3% 0.081 174.7) |
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 #428E7B | 3.89:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #428E7B | 5.38:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #428E7B text on white | 3.89:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #428E7B text on black | 5.38:1 | AA | Lc -35.4 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CCDED8
oklch(88.5% 0.021 173.9)
-
Step 300
300
#A9C9BF
oklch(80.9% 0.037 174.5)
-
Step 400
400
#7AAD9E
oklch(70.7% 0.058 174.3)
-
Step 500
500
#559987
oklch(63.3% 0.075 174.7)
-
Step 600
600 (this color)
#428E7B
oklch(59.3% 0.081 174.7)
-
Step 700
700
#276F5E
oklch(49.2% 0.076 174.5)
-
Step 800
800
#235A4D
oklch(42.7% 0.062 175.2)
-
Step 900
900
#224A40
oklch(37.7% 0.049 175.2)
-
Step 950
950
#152B25
oklch(26.9% 0.03 174.4)
#428E7B 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) | #8A867A | 0.086 |
| Deuteranopia (no green cones) | #7E7D7C | 0.082 |
| Tritanopia (no blue cones) | #1D8F88 | 0.026 |
| Achromatopsia (no color) | #818181 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428E7B
#428E7B
oklch(59.3% 0.081 174.7)
- #A56981
#A56981
oklch(59.2% 0.083 354.3)
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 #428E7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Teal #4C9085 ΔE 0.019
- Slate Green #658D6D ΔE 0.037
- Dark Cyan #008B8B ΔE 0.039
- Ocean Green #3D9973 ΔE 0.039
- Sea #3C9992 ΔE 0.039
- Blue Green #0F9B8E ΔE 0.041
- Teal Green #0A9396 ΔE 0.042
- Viridian #1E9167 ΔE 0.042
Use #428E7B 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.