#428891
Closest named color: Dark Cyan (#008B8B). oklch(58.5% 0.071 206.5), rgb(66, 136, 145).
Aa
Black text reads best on this color (5.16:1).
About this color
#428891 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.071 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.033 away. Black text reads best on it, at 5.16:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #428891 |
| RGB | rgb(66, 136, 145) |
| HSL | hsl(187, 37%, 41%) |
| OKLCH | oklch(58.5% 0.071 206.5) |
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 #428891 | 4.06:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #428891 | 5.16:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #428891 text on white | 4.06:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #428891 text on black | 5.16:1 | AA | Lc -33.9 | 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
#CCDDDF
oklch(88.5% 0.018 205.3)
-
Step 300
300
#AAC7CB
oklch(80.9% 0.032 206.7)
-
Step 400
400
#7BAAB1
oklch(70.7% 0.051 207.6)
-
Step 500
500
#56959D
oklch(63.1% 0.066 206.1)
-
Step 600
600 (this color)
#428891
oklch(58.5% 0.071 206.5)
-
Step 700
700
#2A6B74
oklch(49% 0.067 207.7)
-
Step 800
800
#25585E
oklch(42.8% 0.055 205.7)
-
Step 900
900
#23484D
oklch(37.6% 0.043 206.9)
-
Step 950
950
#162A2D
oklch(26.9% 0.026 207.9)
#428891 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) | #7E8392 | 0.070 |
| Deuteranopia (no green cones) | #727A91 | 0.064 |
| Tritanopia (no blue cones) | #008D8B | 0.035 |
| Achromatopsia (no color) | #7E7E7E | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428891
#428891
oklch(58.5% 0.071 206.5)
- #A26B65
#A26B65
oklch(58.4% 0.072 26.3)
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 #428891, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.033
- Teal Blue #01889F ΔE 0.034
- Dusty Teal #4C9085 ΔE 0.036
- Teal Green #0A9396 ΔE 0.037
- Grey Blue #647D8E ΔE 0.044
- Stormy Blue #507B9C ΔE 0.048
- Cerulean #457B9D ΔE 0.048
- Steel Grey #6F828A ΔE 0.049
Use #428891 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.