#428C6A
Closest named color: Viridian (#1E9167). oklch(58.3% 0.092 161.7), rgb(66, 140, 106).
Aa
Black text reads best on this color (5.19:1).
About this color
#428C6A is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.092 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.026 away. Black text reads best on it, at 5.19:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.19:1 |
| White text | 4.04:1 |
Values
| HEX | #428C6A |
| RGB | rgb(66, 140, 106) |
| HSL | hsl(152, 36%, 40%) |
| OKLCH | oklch(58.3% 0.092 161.7) |
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 #428C6A | 4.04:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #428C6A | 5.19:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #428C6A text on white | 4.04:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #428C6A text on black | 5.19:1 | AA | Lc -34.2 | 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
#CDDED4
oklch(88.5% 0.023 160.2)
-
Step 300
300
#AAC9B8
oklch(80.8% 0.041 161.4)
-
Step 400
400
#7BAE94
oklch(70.7% 0.066 161.9)
-
Step 500
500
#579A79
oklch(63.2% 0.086 161.2)
-
Step 600
600 (this color)
#428C6A
oklch(58.3% 0.092 161.7)
-
Step 700
700
#2B7051
oklch(49.2% 0.086 161.2)
-
Step 800
800
#255B43
oklch(42.7% 0.071 162)
-
Step 900
900
#244B38
oklch(37.8% 0.056 160.9)
-
Step 950
950
#162C21
oklch(27.1% 0.035 161)
#428C6A 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) | #8A8368 | 0.088 |
| Deuteranopia (no green cones) | #7F7B6C | 0.085 |
| Tritanopia (no blue cones) | #298C83 | 0.039 |
| Achromatopsia (no color) | #7E7E7E | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428C6A
#428C6A
oklch(58.3% 0.092 161.7)
- #A0658B
#A0658B
oklch(58.3% 0.091 341.3)
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 #428C6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.026
- Dark Sage #598556 ΔE 0.032
- Sea Green #2E8B57 ΔE 0.033
- Ocean Green #3D9973 ΔE 0.037
- Slate Green #658D6D ΔE 0.037
- Light Forest Green #4F9153 ΔE 0.040
- Dusty Teal #4C9085 ΔE 0.042
- Fern Green #548D44 ΔE 0.051
Use #428C6A 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.