#428E5F
Closest named color: Viridian (#1E9167). oklch(58.5% 0.105 154.3), rgb(66, 142, 95).
Aa
Black text reads best on this color (5.26:1).
About this color
#428E5F is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.105 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.021 away. Black text reads best on it, at 5.26:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.26:1 |
| White text | 3.98:1 |
Values
| HEX | #428E5F |
| RGB | rgb(66, 142, 95) |
| HSL | hsl(143, 37%, 41%) |
| OKLCH | oklch(58.5% 0.105 154.3) |
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 #428E5F | 3.98:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #428E5F | 5.26:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #428E5F text on white | 3.98:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #428E5F text on black | 5.26:1 | AA | Lc -34.7 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E3EDE6
oklch(93.7% 0.014 155.6)
-
Step 200
200
#CCDFD1
oklch(88.6% 0.028 153.8)
-
Step 300
300
#AACAB3
oklch(80.9% 0.047 154)
-
Step 400
400
#7BAF8B
oklch(70.7% 0.076 153.9)
-
Step 500
500
#569B6F
oklch(63.2% 0.097 154.5)
-
Step 600
600 (this color)
#428E5F
oklch(58.5% 0.105 154.3)
-
Step 700
700
#2A7147
oklch(49.2% 0.098 154.4)
-
Step 800
800
#255C3A
oklch(42.8% 0.081 153.9)
-
Step 900
900
#234B32
oklch(37.6% 0.063 154.5)
-
Step 950
950
#162C1D
oklch(27% 0.04 153.2)
#428E5F 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) | #8E845C | 0.094 |
| Deuteranopia (no green cones) | #837C62 | 0.092 |
| Tritanopia (no blue cones) | #2E8D82 | 0.052 |
| Achromatopsia (no color) | #7F7F7F | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428E5F
#428E5F
oklch(58.5% 0.105 154.3)
- #A26395
#A26395
oklch(58.6% 0.105 334.7)
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 #428E5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.021
- Sea Green #2E8B57 ΔE 0.022
- Light Forest Green #4F9153 ΔE 0.023
- Dark Sage #598556 ΔE 0.030
- Fern Green #548D44 ΔE 0.034
- Ocean Green #3D9973 ΔE 0.036
- Slate Green #658D6D ΔE 0.044
- Moss Green #658B38 ΔE 0.050
Use #428E5F 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.