#428E99
Closest named color: Teal Green (#0A9396). oklch(60.3% 0.076 208), rgb(66, 142, 153).
Aa
Black text reads best on this color (5.56:1).
About this color
#428E99 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.076 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Green (#0A9396), ΔE 0.029 away. Black text reads best on it, at 5.56:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Teal Green (#0A9396) |
| Black text | 5.56:1 |
| White text | 3.77:1 |
Values
| HEX | #428E99 |
| RGB | rgb(66, 142, 153) |
| HSL | hsl(188, 40%, 43%) |
| OKLCH | oklch(60.3% 0.076 208) |
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 #428E99 | 3.77:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #428E99 | 5.56:1 | AA | Lc 39.0 | Non-text elements, placeholder text |
| #428E99 text on white | 3.77:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #428E99 text on black | 5.56:1 | AA | Lc -36.6 | 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 500.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A6C8CD
oklch(81% 0.037 207.3)
-
Step 400
400
#73ABB4
oklch(70.6% 0.06 208.5)
-
Step 500
500 (this color)
#428E99
oklch(60.3% 0.076 208)
-
Step 600
600
#28818D
oklch(55.7% 0.083 208)
-
Step 700
700
#186D78
oklch(49.2% 0.078 208.1)
-
Step 800
800
#185961
oklch(42.8% 0.064 207)
-
Step 900
900
#1C494F
oklch(37.7% 0.05 207.2)
-
Step 950
950
#122B2E
oklch(27.1% 0.031 205.7)
#428E99 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) | #83899A | 0.074 |
| Deuteranopia (no green cones) | #767F99 | 0.068 |
| Tritanopia (no blue cones) | #009491 | 0.036 |
| Achromatopsia (no color) | #838383 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428E99
#428E99
oklch(60.3% 0.076 208)
- #AA6F68
#AA6F68
oklch(60.2% 0.077 27)
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 #428E99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Green #0A9396 ΔE 0.029
- Dusty Teal #4C9085 ΔE 0.034
- Sea #3C9992 ΔE 0.038
- Teal Blue #01889F ΔE 0.038
- Dark Cyan #008B8B ΔE 0.040
- Blue NCS #118AB2 ΔE 0.049
- Dusty Blue #5A86AD ΔE 0.050
- Blue Green #0F9B8E ΔE 0.052
Use #428E99 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.