#428B8B
Closest named color: Dusty Teal (#4C9085). oklch(59% 0.073 195.4), rgb(66, 139, 139).
Aa
Black text reads best on this color (5.29:1).
About this color
#428B8B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.073 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Teal (#4C9085), ΔE 0.022 away. Black text reads best on it, at 5.29:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dusty Teal (#4C9085) |
| Black text | 5.29:1 |
| White text | 3.96:1 |
Values
| HEX | #428B8B |
| RGB | rgb(66, 139, 139) |
| HSL | hsl(180, 36%, 40%) |
| OKLCH | oklch(59% 0.073 195.4) |
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 #428B8B | 3.96:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #428B8B | 5.29:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #428B8B text on white | 3.96:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #428B8B text on black | 5.29:1 | AA | Lc -34.8 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDD
oklch(88.5% 0.018 196.8)
-
Step 300
300
#A9C8C7
oklch(81% 0.033 194.1)
-
Step 400
400
#7AABAB
oklch(70.7% 0.052 196)
-
Step 500
500
#559696
oklch(63% 0.067 195.6)
-
Step 600
600 (this color)
#428B8B
oklch(59% 0.073 195.4)
-
Step 700
700
#286D6D
oklch(49.2% 0.068 195.2)
-
Step 800
800
#235959
oklch(42.8% 0.057 195.2)
-
Step 900
900
#234949
oklch(37.8% 0.043 195.5)
-
Step 950
950
#152B2B
oklch(27.1% 0.028 195.6)
#428B8B 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) | #83858B | 0.076 |
| Deuteranopia (no green cones) | #777C8C | 0.071 |
| Tritanopia (no blue cones) | #088F8B | 0.028 |
| Achromatopsia (no color) | #808080 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428B8B
#428B8B
oklch(59% 0.073 195.4)
- #A46B6F
#A46B6F
oklch(58.9% 0.073 14.9)
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 #428B8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Teal #4C9085 ΔE 0.022
- Dark Cyan #008B8B ΔE 0.029
- Teal Green #0A9396 ΔE 0.031
- Sea #3C9992 ΔE 0.040
- Teal Blue #01889F ΔE 0.044
- Blue Green #0F9B8E ΔE 0.049
- Teal #008080 ΔE 0.051
- Steel Grey #6F828A ΔE 0.052
Use #428B8B 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.