#428550
Closest named color: Sea Green (#2E8B57). oklch(55.8% 0.107 148.8), rgb(66, 133, 80).
Aa
Black text reads best on this color (4.70:1).
About this color
#428550 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.107 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.020 away. Black text reads best on it, at 4.70:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.70:1 |
| White text | 4.46:1 |
Values
| HEX | #428550 |
| RGB | rgb(66, 133, 80) |
| HSL | hsl(133, 34%, 39%) |
| OKLCH | oklch(55.8% 0.107 148.8) |
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 #428550 | 4.46:1 | AA large text | Lc -76.3 | Fine for body text |
| Black text on #428550 | 4.70:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #428550 text on white | 4.46:1 | AA large text | Lc 70.8 | Content text, not long reading |
| #428550 text on black | 4.70:1 | AA | Lc -30.9 | 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
#F3F7F3
oklch(97.2% 0.007 145.5)
-
Step 100
100
#E4EDE5
oklch(93.7% 0.014 148.8)
-
Step 200
200
#CEDED0
oklch(88.5% 0.026 149.1)
-
Step 300
300
#ACCAB0
oklch(81% 0.048 148.9)
-
Step 400
400
#7FAE86
oklch(70.6% 0.077 148.7)
-
Step 500
500
#5D9A68
oklch(63.1% 0.098 148.8)
-
Step 600
600 (this color)
#428550
oklch(55.8% 0.107 148.8)
-
Step 700
700
#337040
oklch(49.1% 0.099 148.6)
-
Step 800
800
#2B5B35
oklch(42.6% 0.082 148.8)
-
Step 900
900
#274B2E
oklch(37.7% 0.065 148.8)
-
Step 950
950
#182C1B
oklch(27% 0.041 148)
#428550 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) | #867B4C | 0.087 |
| Deuteranopia (no green cones) | #7D7553 | 0.086 |
| Tritanopia (no blue cones) | #358378 | 0.060 |
| Achromatopsia (no color) | #777777 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428550
#428550
oklch(55.8% 0.107 148.8)
- #965C93
#965C93
oklch(55.9% 0.107 328.7)
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 #428550, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.020
- Dark Sage #598556 ΔE 0.027
- Fern Green #548D44 ΔE 0.037
- Light Forest Green #4F9153 ΔE 0.040
- Viridian #1E9167 ΔE 0.040
- Jungle Green #048243 ΔE 0.041
- Military Green #667C3E ΔE 0.043
- Swamp #698339 ΔE 0.045
Use #428550 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.