#428B64
Closest named color: Viridian (#1E9167). oklch(57.9% 0.096 158), rgb(66, 139, 100).
Aa
Black text reads best on this color (5.10:1).
About this color
#428B64 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.096 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.025 away. Black text reads best on it, at 5.10:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.096) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.10:1 |
| White text | 4.11:1 |
Values
| HEX | #428B64 |
| RGB | rgb(66, 139, 100) |
| HSL | hsl(148, 36%, 40%) |
| OKLCH | oklch(57.9% 0.096 158) |
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 #428B64 | 4.11:1 | AA large text | Lc -73.5 | Content text, not long reading |
| Black text on #428B64 | 5.10:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #428B64 text on white | 4.11:1 | AA large text | Lc 68.0 | Content text, not long reading |
| #428B64 text on black | 5.10:1 | AA | Lc -33.6 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E3ECE7
oklch(93.5% 0.012 162)
-
Step 200
200
#CDDED3
oklch(88.5% 0.024 157.5)
-
Step 300
300
#AACAB6
oklch(81% 0.044 157.8)
-
Step 400
400
#7CAE90
oklch(70.7% 0.069 157.7)
-
Step 500
500
#589A75
oklch(63.1% 0.089 158)
-
Step 600
600 (this color)
#428B64
oklch(57.9% 0.096 158)
-
Step 700
700
#2C704D
oklch(49.2% 0.089 158)
-
Step 800
800
#265B3F
oklch(42.7% 0.074 157.9)
-
Step 900
900
#244B36
oklch(37.7% 0.058 158.4)
-
Step 950
950
#162C20
oklch(27% 0.036 158.9)
#428B64 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) | #8A8262 | 0.089 |
| Deuteranopia (no green cones) | #7F7A66 | 0.086 |
| Tritanopia (no blue cones) | #2D8A80 | 0.043 |
| Achromatopsia (no color) | #7D7D7D | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428B64
#428B64
oklch(57.9% 0.096 158)
- #9F638E
#9F638E
oklch(57.9% 0.096 338)
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 #428B64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.025
- Sea Green #2E8B57 ΔE 0.026
- Dark Sage #598556 ΔE 0.027
- Light Forest Green #4F9153 ΔE 0.035
- Ocean Green #3D9973 ΔE 0.041
- Slate Green #658D6D ΔE 0.041
- Fern Green #548D44 ΔE 0.044
- Dusty Teal #4C9085 ΔE 0.050
Use #428B64 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.