#428A4A
Closest named color: Sea Green (#2E8B57). oklch(57.1% 0.12 146.1), rgb(66, 138, 74).
Aa
Black text reads best on this color (4.96:1).
About this color
#428A4A is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.120 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.019 away. Black text reads best on it, at 4.96:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.120) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.96:1 |
| White text | 4.22:1 |
Values
| HEX | #428A4A |
| RGB | rgb(66, 138, 74) |
| HSL | hsl(127, 35%, 40%) |
| OKLCH | oklch(57.1% 0.12 146.1) |
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 #428A4A | 4.22:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #428A4A | 4.96:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #428A4A text on white | 4.22:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #428A4A text on black | 4.96:1 | AA | Lc -32.7 | 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
#E4EDE4
oklch(93.7% 0.015 145.5)
-
Step 200
200
#CDDFCE
oklch(88.5% 0.03 146.9)
-
Step 300
300
#ABCBAC
oklch(81% 0.055 145.9)
-
Step 400
400
#7DAF80
oklch(70.6% 0.086 146.1)
-
Step 500
500
#5A9B60
oklch(63% 0.11 146.2)
-
Step 600
600 (this color)
#428A4A
oklch(57.1% 0.12 146.1)
-
Step 700
700
#2F7137
oklch(49.1% 0.112 146)
-
Step 800
800
#285C2E
oklch(42.7% 0.093 146)
-
Step 900
900
#264C29
oklch(37.8% 0.073 145.6)
-
Step 950
950
#172C19
oklch(26.9% 0.044 146.4)
#428A4A 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) | #8C7F45 | 0.094 |
| Deuteranopia (no green cones) | #82784E | 0.093 |
| Tritanopia (no blue cones) | #36877B | 0.073 |
| Achromatopsia (no color) | #7B7B7B | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #428A4A
#428A4A
oklch(57.1% 0.12 146.1)
- #9C5C9D
#9C5C9D
oklch(57% 0.121 326.5)
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 #428A4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.019
- Fern Green #548D44 ΔE 0.021
- Light Forest Green #4F9153 ΔE 0.027
- Dark Sage #598556 ΔE 0.035
- Viridian #1E9167 ΔE 0.038
- Moss Green #658B38 ΔE 0.039
- Swamp #698339 ΔE 0.043
- Mossy Green #638B27 ΔE 0.044
Use #428A4A 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.