#428540
Closest named color: Sea Green (#2E8B57). oklch(55.5% 0.123 143.2), rgb(66, 133, 64).
Aa
Black text reads best on this color (4.66:1).
About this color
#428540 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.123 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.028 away. Black text reads best on it, at 4.66:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.66:1 |
| White text | 4.50:1 |
Values
| HEX | #428540 |
| RGB | rgb(66, 133, 64) |
| HSL | hsl(118, 35%, 39%) |
| OKLCH | oklch(55.5% 0.123 143.2) |
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 #428540 | 4.50:1 | AA | Lc -76.5 | Fine for body text |
| Black text on #428540 | 4.66:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #428540 text on white | 4.50:1 | AA | Lc 71.1 | Content text, not long reading |
| #428540 text on black | 4.66:1 | AA | Lc -30.6 | 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
#F3F7F2
oklch(97.2% 0.008 139.4)
-
Step 100
100
#E4EDE3
oklch(93.7% 0.016 142.6)
-
Step 200
200
#CEDFCC
oklch(88.6% 0.031 142.3)
-
Step 300
300
#ACCAAA
oklch(80.8% 0.055 143.4)
-
Step 400
400
#7FAF7D
oklch(70.6% 0.088 143.6)
-
Step 500
500
#5E9B5B
oklch(63.1% 0.113 143.1)
-
Step 600
600 (this color)
#428540
oklch(55.5% 0.123 143.2)
-
Step 700
700
#337132
oklch(49.2% 0.115 143.3)
-
Step 800
800
#2B5C2A
oklch(42.7% 0.095 143.3)
-
Step 900
900
#284B26
oklch(37.6% 0.073 142.8)
-
Step 950
950
#182C17
oklch(26.9% 0.046 143.1)
#428540 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) | #887A3A | 0.091 |
| Deuteranopia (no green cones) | #7E7445 | 0.090 |
| Tritanopia (no blue cones) | #398275 | 0.077 |
| Achromatopsia (no color) | #777777 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428540
#428540
oklch(55.5% 0.123 143.2)
- #95589C
#95589C
oklch(55.5% 0.123 323.3)
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 #428540, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.028
- Fern Green #548D44 ΔE 0.032
- Jungle Green #048243 ΔE 0.035
- Dark Sage #598556 ΔE 0.041
- Light Forest Green #4F9153 ΔE 0.042
- Swamp #698339 ΔE 0.042
- Moss Green #658B38 ΔE 0.044
- Military Green #667C3E ΔE 0.046
Use #428540 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.