#428C61
Closest named color: Sea Green (#2E8B57). oklch(58.1% 0.1 155.9), rgb(66, 140, 97).
Aa
Black text reads best on this color (5.15:1).
About this color
#428C61 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.100 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.022 away. Black text reads best on it, at 5.15:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.100) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #428C61 |
| RGB | rgb(66, 140, 97) |
| HSL | hsl(145, 36%, 40%) |
| OKLCH | oklch(58.1% 0.1 155.9) |
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 #428C61 | 4.07:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #428C61 | 5.15:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #428C61 text on white | 4.07:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #428C61 text on black | 5.15:1 | AA | Lc -33.9 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E3EDE6
oklch(93.7% 0.014 155.6)
-
Step 200
200
#CDDED2
oklch(88.4% 0.024 155.1)
-
Step 300
300
#AACAB5
oklch(81% 0.045 156.5)
-
Step 400
400
#7CAE8E
oklch(70.6% 0.071 156)
-
Step 500
500
#589A72
oklch(63.1% 0.091 156)
-
Step 600
600 (this color)
#428C61
oklch(58.1% 0.1 155.9)
-
Step 700
700
#2C704A
oklch(49.1% 0.092 156)
-
Step 800
800
#265B3D
oklch(42.6% 0.076 156.2)
-
Step 900
900
#244B34
oklch(37.7% 0.06 156.1)
-
Step 950
950
#162C1F
oklch(27% 0.037 156.8)
#428C61 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) | #8B825E | 0.090 |
| Deuteranopia (no green cones) | #817B64 | 0.089 |
| Tritanopia (no blue cones) | #2E8B81 | 0.049 |
| Achromatopsia (no color) | #7E7E7E | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428C61
#428C61
oklch(58.1% 0.1 155.9)
- #9F6391
#9F6391
oklch(58.1% 0.099 335.8)
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 #428C61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.022
- Viridian #1E9167 ΔE 0.023
- Dark Sage #598556 ΔE 0.027
- Light Forest Green #4F9153 ΔE 0.029
- Fern Green #548D44 ΔE 0.039
- Ocean Green #3D9973 ΔE 0.039
- Slate Green #658D6D ΔE 0.043
- Dusty Teal #4C9085 ΔE 0.054
Use #428C61 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.