#4EB21B
Closest named color: Leafy Green (#51B73B). oklch(67.7% 0.2 138.1), rgb(78, 178, 27).
Aa
Black text reads best on this color (7.70:1).
About this color
#4EB21B is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.200 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.022 away. Black text reads best on it, at 7.70:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.200) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 7.70:1 |
| White text | 2.72:1 |
Values
| HEX | #4EB21B |
| RGB | rgb(78, 178, 27) |
| HSL | hsl(100, 74%, 40%) |
| OKLCH | oklch(67.7% 0.2 138.1) |
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 #4EB21B | 2.72:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #4EB21B | 7.70:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #4EB21B text on white | 2.72:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #4EB21B text on black | 7.70:1 | AAA | Lc -49.5 | 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 400.
-
Step 50
50
#F0F8EE
oklch(97% 0.016 139.4)
-
Step 100
100
#DEF0D9
oklch(93.6% 0.036 138.9)
-
Step 200
200
#C3E5B8
oklch(88.6% 0.07 138.1)
-
Step 300
300
#98D484
oklch(81% 0.125 138.1)
-
Step 400
400 (this color)
#4EB21B
oklch(67.7% 0.2 138.1)
-
Step 500
500
#41A300
oklch(63.2% 0.196 138.1)
-
Step 600
600
#368900
oklch(55.6% 0.172 138)
-
Step 700
700
#2C7300
oklch(49.1% 0.152 138.1)
-
Step 800
800
#235E00
oklch(42.6% 0.131 138)
-
Step 900
900
#1C4F00
oklch(37.8% 0.117 138)
-
Step 950
950
#0D2F00
oklch(26.9% 0.084 138.2)
#4EB21B 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) | #B8A200 | 0.129 |
| Deuteranopia (no green cones) | #AB9A2F | 0.128 |
| Tritanopia (no blue cones) | #45AC97 | 0.138 |
| Achromatopsia (no color) | #9D9D9D | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4EB21B
#4EB21B
oklch(67.7% 0.2 138.1)
- #C967E5
#C967E5
oklch(67.7% 0.2 318.3)
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 #4EB21B, closest first.
No curated palette has a color within ΔE 0.04 of #4EB21B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.022
- Grass #5CAC2D ΔE 0.025
- Leaf Green #5CA904 ΔE 0.025
- Frog Green #58BC08 ΔE 0.032
- Shamrock #01B44C ΔE 0.037
- Medium Green #39AD48 ΔE 0.038
- Kelly Green #02AB2E ΔE 0.041
- Leaf #71AA34 ΔE 0.045
Use #4EB21B 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.