#428666
Closest named color: Dark Sage (#598556). oklch(56.6% 0.086 161.4), rgb(66, 134, 102).
Aa
Black text reads best on this color (4.83:1).
About this color
#428666 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.086 and its hue 161°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Sage (#598556), ΔE 0.028 away. Black text reads best on it, at 4.83:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.086) |
| Temperature | in between |
| Nearest name | Dark Sage (#598556) |
| Black text | 4.83:1 |
| White text | 4.34:1 |
Values
| HEX | #428666 |
| RGB | rgb(66, 134, 102) |
| HSL | hsl(152, 34%, 39%) |
| OKLCH | oklch(56.6% 0.086 161.4) |
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 #428666 | 4.34:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #428666 | 4.83:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #428666 text on white | 4.34:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #428666 text on black | 4.83:1 | AA | Lc -31.7 | 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
#F3F7F4
oklch(97.2% 0.006 153.8)
-
Step 100
100
#E4ECE7
oklch(93.6% 0.011 158.8)
-
Step 200
200
#CDDED5
oklch(88.5% 0.022 163)
-
Step 300
300
#ABC9B9
oklch(80.9% 0.039 162.2)
-
Step 400
400
#7EAD94
oklch(70.7% 0.062 161)
-
Step 500
500
#5B997A
oklch(63.2% 0.08 161.2)
-
Step 600
600 (this color)
#428666
oklch(56.6% 0.086 161.4)
-
Step 700
700
#306F52
oklch(49.2% 0.081 161.3)
-
Step 800
800
#295A43
oklch(42.6% 0.066 161.3)
-
Step 900
900
#264A39
oklch(37.6% 0.051 162.1)
-
Step 950
950
#172B21
oklch(26.8% 0.032 161.4)
#428666 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) | #847E64 | 0.082 |
| Deuteranopia (no green cones) | #7A7668 | 0.080 |
| Tritanopia (no blue cones) | #2D867D | 0.036 |
| Achromatopsia (no color) | #797979 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428666
#428666
oklch(56.6% 0.086 161.4)
- #996285
#996285
oklch(56.7% 0.085 341.6)
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 #428666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sage #598556 ΔE 0.028
- Sea Green #2E8B57 ΔE 0.035
- Viridian #1E9167 ΔE 0.037
- Slate Green #658D6D ΔE 0.046
- Light Forest Green #4F9153 ΔE 0.050
- Dusty Teal #4C9085 ΔE 0.050
- Ocean Green #3D9973 ΔE 0.055
- Dark Cyan #008B8B ΔE 0.055
Use #428666 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.