#21AF4B
Closest named color: Medium Green (#39AD48). oklch(66.1% 0.182 147.8), rgb(33, 175, 75).
Aa
Black text reads best on this color (7.29:1).
About this color
#21AF4B is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.182 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Green (#39AD48), ΔE 0.010 away. Black text reads best on it, at 7.29:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.182) |
| Temperature | in between |
| Nearest name | Medium Green (#39AD48) |
| Black text | 7.29:1 |
| White text | 2.87:1 |
Values
| HEX | #21AF4B |
| RGB | rgb(33, 175, 75) |
| HSL | hsl(138, 68%, 41%) |
| OKLCH | oklch(66.1% 0.182 147.8) |
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 #21AF4B | 2.87:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #21AF4B | 7.29:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #21AF4B text on white | 2.87:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #21AF4B text on black | 7.29:1 | AAA | Lc -47.4 | Large or bold text, headings |
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 500.
-
Step 50
50
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DFEFE0
oklch(93.6% 0.026 147.1)
-
Step 200
200
#C4E3C7
oklch(88.6% 0.05 147.8)
-
Step 300
300
#9AD1A0
oklch(81% 0.089 147.5)
-
Step 400
400
#5BB86C
oklch(70.7% 0.141 147.9)
-
Step 500
500 (this color)
#21AF4B
oklch(66.1% 0.182 147.8)
-
Step 600
600
#008B35
oklch(55.5% 0.161 147.8)
-
Step 700
700
#00752B
oklch(49% 0.143 147.8)
-
Step 800
800
#006022
oklch(42.6% 0.124 147.8)
-
Step 900
900
#00501B
oklch(37.6% 0.109 147.8)
-
Step 950
950
#03300F
oklch(27.1% 0.075 147.8)
#21AF4B 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) | #B19F41 | 0.143 |
| Deuteranopia (no green cones) | #A19453 | 0.142 |
| Tritanopia (no blue cones) | #00AB99 | 0.107 |
| Achromatopsia (no color) | #989898 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21AF4B
#21AF4B
oklch(66.1% 0.182 147.8)
- #CB63CA
#CB63CA
oklch(66% 0.182 327.8)
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 #21AF4B, closest first.
No curated palette has a color within ΔE 0.04 of #21AF4B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Green #39AD48 ΔE 0.010
- Shamrock #01B44C ΔE 0.015
- Kelly Green #02AB2E ΔE 0.028
- Mid Green #50A747 ΔE 0.031
- Cool Green #33B864 ΔE 0.036
- Grass #5CAC2D ΔE 0.036
- Dark Pastel Green #56AE57 ΔE 0.037
- Jade Green #2BAF6A ΔE 0.038
Use #21AF4B 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.