#428657
Closest named color: Sea Green (#2E8B57). oklch(56.2% 0.101 151.9), rgb(66, 134, 87).
Aa
Black text reads best on this color (4.77:1).
About this color
#428657 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.101 and its hue 152°. 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 4.77:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.77:1 |
| White text | 4.39:1 |
Values
| HEX | #428657 |
| RGB | rgb(66, 134, 87) |
| HSL | hsl(139, 34%, 39%) |
| OKLCH | oklch(56.2% 0.101 151.9) |
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 #428657 | 4.39:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #428657 | 4.77:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #428657 text on white | 4.39:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #428657 text on black | 4.77:1 | AA | Lc -31.4 | 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
#E4ECE6
oklch(93.5% 0.012 153.7)
-
Step 200
200
#CEDED1
oklch(88.5% 0.025 151.1)
-
Step 300
300
#ACCAB2
oklch(81% 0.046 151.1)
-
Step 400
400
#7FAE8A
oklch(70.7% 0.073 151.4)
-
Step 500
500
#5C9A6D
oklch(63.2% 0.094 151.7)
-
Step 600
600 (this color)
#428657
oklch(56.2% 0.101 151.9)
-
Step 700
700
#317045
oklch(49.2% 0.095 151.8)
-
Step 800
800
#2A5B39
oklch(42.7% 0.078 151.8)
-
Step 900
900
#274B31
oklch(37.8% 0.061 151.5)
-
Step 950
950
#172C1D
oklch(27% 0.039 152.2)
#428657 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) | #867C54 | 0.087 |
| Deuteranopia (no green cones) | #7D765A | 0.085 |
| Tritanopia (no blue cones) | #33847A | 0.054 |
| Achromatopsia (no color) | #787878 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428657
#428657
oklch(56.2% 0.101 151.9)
- #985E90
#985E90
oklch(56.3% 0.102 331.9)
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 #428657, 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 0.023
- Viridian #1E9167 ΔE 0.035
- Light Forest Green #4F9153 ΔE 0.039
- Fern Green #548D44 ΔE 0.040
- Military Green #667C3E ΔE 0.046
- Jungle Green #048243 ΔE 0.047
- Swamp #698339 ΔE 0.048
Use #428657 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.