#428588
Closest named color: Dark Cyan (#008B8B). oklch(57.4% 0.068 199.3), rgb(66, 133, 136).
Aa
Black text reads best on this color (4.94:1).
About this color
#428588 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.068 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.031 away. Black text reads best on it, at 4.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #428588 |
| RGB | rgb(66, 133, 136) |
| HSL | hsl(183, 35%, 40%) |
| OKLCH | oklch(57.4% 0.068 199.3) |
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 #428588 | 4.24:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #428588 | 4.94:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #428588 text on white | 4.24:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #428588 text on black | 4.94:1 | AA | Lc -32.5 | 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
#CDDDDD
oklch(88.6% 0.017 196.8)
-
Step 300
300
#ABC7C8
oklch(80.9% 0.03 199.2)
-
Step 400
400
#7CAAAC
oklch(70.6% 0.049 199.5)
-
Step 500
500
#599598
oklch(63% 0.063 199.8)
-
Step 600
600 (this color)
#428588
oklch(57.4% 0.068 199.3)
-
Step 700
700
#2E6C6E
oklch(49.2% 0.063 198.2)
-
Step 800
800
#27585A
oklch(42.8% 0.053 198.9)
-
Step 900
900
#25484A
oklch(37.6% 0.041 200.4)
-
Step 950
950
#162A2B
oklch(26.9% 0.026 199.8)
#428588 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) | #7D8088 | 0.070 |
| Deuteranopia (no green cones) | #717788 | 0.065 |
| Tritanopia (no blue cones) | #138986 | 0.028 |
| Achromatopsia (no color) | #7B7B7B | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428588
#428588
oklch(57.4% 0.068 199.3)
- #9D6868
#9D6868
oklch(57.3% 0.069 19.4)
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 #428588, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.031
- Dusty Teal #4C9085 ΔE 0.038
- Teal #008080 ΔE 0.040
- Teal Blue #01889F ΔE 0.041
- Teal Green #0A9396 ΔE 0.043
- Grey Blue #647D8E ΔE 0.045
- Battleship Grey #6B7C85 ΔE 0.049
- Steel Grey #6F828A ΔE 0.051
Use #428588 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.