#428D55
Closest named color: Sea Green (#2E8B57). oklch(58.1% 0.114 149.8), rgb(66, 141, 85).
Aa
Black text reads best on this color (5.17:1).
About this color
#428D55 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.114 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.017 away. Black text reads best on it, at 5.17:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.17:1 |
| White text | 4.05:1 |
Values
| HEX | #428D55 |
| RGB | rgb(66, 141, 85) |
| HSL | hsl(135, 36%, 41%) |
| OKLCH | oklch(58.1% 0.114 149.8) |
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 #428D55 | 4.05:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #428D55 | 5.17:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #428D55 text on white | 4.05:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #428D55 text on black | 5.17:1 | AA | Lc -34.1 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E3EDE5
oklch(93.6% 0.015 151.8)
-
Step 200
200
#CDDFCF
oklch(88.6% 0.029 148.6)
-
Step 300
300
#AACAAF
oklch(80.8% 0.051 149.6)
-
Step 400
400
#7CAF85
oklch(70.6% 0.082 149.4)
-
Step 500
500
#589B67
oklch(63.1% 0.104 149.8)
-
Step 600
600 (this color)
#428D55
oklch(58.1% 0.114 149.8)
-
Step 700
700
#2C713F
oklch(49.1% 0.105 149.9)
-
Step 800
800
#265C34
oklch(42.7% 0.087 149.8)
-
Step 900
900
#244C2E
oklch(37.8% 0.068 150.2)
-
Step 950
950
#162C1B
oklch(26.9% 0.042 150.1)
#428D55 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) | #8E8251 | 0.095 |
| Deuteranopia (no green cones) | #837B59 | 0.093 |
| Tritanopia (no blue cones) | #328B7F | 0.063 |
| Achromatopsia (no color) | #7E7E7E | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428D55
#428D55
oklch(58.1% 0.114 149.8)
- #A0609B
#A0609B
oklch(58.1% 0.115 329.8)
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 #428D55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.017
- Light Forest Green #4F9153 ΔE 0.018
- Fern Green #548D44 ΔE 0.024
- Viridian #1E9167 ΔE 0.027
- Dark Sage #598556 ΔE 0.032
- Moss Green #658B38 ΔE 0.042
- Ocean Green #3D9973 ΔE 0.045
- Swamp #698339 ΔE 0.047
Use #428D55 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.