#428591
Closest named color: Teal Blue (#01889F). oklch(57.8% 0.07 210.7), rgb(66, 133, 145).
Aa
Black text reads best on this color (4.99:1).
About this color
#428591 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.070 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.032 away. Black text reads best on it, at 4.99:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 4.99:1 |
| White text | 4.20:1 |
Values
| HEX | #428591 |
| RGB | rgb(66, 133, 145) |
| HSL | hsl(189, 37%, 41%) |
| OKLCH | oklch(57.8% 0.07 210.7) |
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 #428591 | 4.20:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #428591 | 4.99:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #428591 text on white | 4.20:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #428591 text on black | 4.99:1 | AA | Lc -32.8 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CDDCE0
oklch(88.4% 0.017 215.5)
-
Step 300
300
#AAC7CC
oklch(81% 0.032 209.2)
-
Step 400
400
#7CAAB2
oklch(70.8% 0.05 209.4)
-
Step 500
500
#58949F
oklch(63% 0.064 210.5)
-
Step 600
600 (this color)
#428591
oklch(57.8% 0.07 210.7)
-
Step 700
700
#2D6B76
oklch(49.2% 0.065 210.9)
-
Step 800
800
#265760
oklch(42.7% 0.055 211.2)
-
Step 900
900
#25484E
oklch(37.8% 0.042 209.8)
-
Step 950
950
#162A2E
oklch(27% 0.027 211.7)
#428591 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) | #7B8192 | 0.067 |
| Deuteranopia (no green cones) | #6E7891 | 0.059 |
| Tritanopia (no blue cones) | #008A89 | 0.037 |
| Achromatopsia (no color) | #7B7B7B | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428591
#428591
oklch(57.8% 0.07 210.7)
- #9F6A60
#9F6A60
oklch(57.8% 0.07 31.1)
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 #428591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.032
- Dark Cyan #008B8B ΔE 0.036
- Grey Blue #647D8E ΔE 0.040
- Cerulean #457B9D ΔE 0.040
- Stormy Blue #507B9C ΔE 0.041
- Teal Green #0A9396 ΔE 0.044
- Dusty Teal #4C9085 ΔE 0.045
- Teal #008080 ΔE 0.047
Use #428591 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.