#288D21
Closest named color: Forest Green (#228B22). oklch(56.5% 0.17 142.2), rgb(40, 141, 33).
Aa
Black text reads best on this color (4.92:1).
About this color
#288D21 is a medium-dark, vivid green. In OKLCH its lightness is 56%, its chroma 0.170 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Forest Green (#228B22), ΔE 0.007 away. Black text reads best on it, at 4.92:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.170) |
| Temperature | in between |
| Nearest name | Forest Green (#228B22) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #288D21 |
| RGB | rgb(40, 141, 33) |
| HSL | hsl(116, 62%, 34%) |
| OKLCH | oklch(56.5% 0.17 142.2) |
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 #288D21 | 4.26:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #288D21 | 4.92:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #288D21 text on white | 4.26:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #288D21 text on black | 4.92:1 | AA | Lc -32.6 | 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
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E2EEE0
oklch(93.6% 0.023 141.2)
-
Step 200
200
#CAE1C7
oklch(88.6% 0.043 142)
-
Step 300
300
#A5CEA0
oklch(81% 0.077 142)
-
Step 400
400
#72B46C
oklch(70.8% 0.122 142.3)
-
Step 500
500
#49A042
oklch(63.1% 0.156 142.2)
-
Step 600
600 (this color)
#288D21
oklch(56.5% 0.17 142.2)
-
Step 700
700
#14750E
oklch(49% 0.158 142.2)
-
Step 800
800
#166011
oklch(42.9% 0.131 142.2)
-
Step 900
900
#1B4E17
oklch(37.6% 0.101 142.1)
-
Step 950
950
#112E0F
oklch(27% 0.064 142.4)
#288D21 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) | #907F0A | 0.119 |
| Deuteranopia (no green cones) | #85772D | 0.120 |
| Tritanopia (no blue cones) | #0B8978 | 0.109 |
| Achromatopsia (no color) | #7A7A7A | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #288D21
#288D21
oklch(56.5% 0.17 142.2)
- #A24CB0
#A24CB0
oklch(56.4% 0.171 321.9)
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 #288D21, closest first.
No curated palette has a color within ΔE 0.04 of #288D21.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Forest Green #228B22 ΔE 0.007
- Emerald Green #028F1E ΔE 0.013
- Kelley Green #009337 ΔE 0.021
- Irish Green #019529 ΔE 0.023
- True Green #089404 ΔE 0.028
- Dark Grass Green #388004 ΔE 0.037
- Sap Green #5C8B15 ΔE 0.043
- Tree Green #2A7E19 ΔE 0.045
Use #288D21 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.