#428A63
Closest named color: Sea Green (#2E8B57). oklch(57.6% 0.095 157.8), rgb(66, 138, 99).
Aa
Black text reads best on this color (5.04:1).
About this color
#428A63 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.095 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.025 away. Black text reads best on it, at 5.04:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.095) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #428A63 |
| RGB | rgb(66, 138, 99) |
| HSL | hsl(148, 35%, 40%) |
| OKLCH | oklch(57.6% 0.095 157.8) |
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 #428A63 | 4.16:1 | AA large text | Lc -74.0 | Content text, not long reading |
| Black text on #428A63 | 5.04:1 | AA | Lc 35.6 | Non-text elements, placeholder text |
| #428A63 text on white | 4.16:1 | AA large text | Lc 68.5 | Content text, not long reading |
| #428A63 text on black | 5.04:1 | AA | Lc -33.2 | 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
#CDDED3
oklch(88.5% 0.024 157.5)
-
Step 300
300
#ABC9B6
oklch(80.8% 0.042 157.5)
-
Step 400
400
#7CAE90
oklch(70.7% 0.069 157.7)
-
Step 500
500
#599A75
oklch(63.2% 0.088 157.7)
-
Step 600
600 (this color)
#428A63
oklch(57.6% 0.095 157.8)
-
Step 700
700
#2D704D
oklch(49.2% 0.089 157.8)
-
Step 800
800
#275B3F
oklch(42.7% 0.073 157.6)
-
Step 900
900
#254B36
oklch(37.8% 0.057 157.9)
-
Step 950
950
#162C20
oklch(27% 0.036 158.9)
#428A63 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) | #898161 | 0.088 |
| Deuteranopia (no green cones) | #7E7965 | 0.085 |
| Tritanopia (no blue cones) | #2D897F | 0.043 |
| Achromatopsia (no color) | #7C7C7C | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428A63
#428A63
oklch(57.6% 0.095 157.8)
- #9D628D
#9D628D
oklch(57.5% 0.096 337.4)
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 #428A63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.025
- Dark Sage #598556 ΔE 0.025
- Viridian #1E9167 ΔE 0.026
- Light Forest Green #4F9153 ΔE 0.036
- Slate Green #658D6D ΔE 0.042
- Ocean Green #3D9973 ΔE 0.044
- Fern Green #548D44 ΔE 0.045
- Dusty Teal #4C9085 ΔE 0.051
Use #428A63 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.