#21B213
Closest named color: Kelly Green (#02AB2E). oklch(66.5% 0.217 142), rgb(33, 178, 19).
Aa
Black text reads best on this color (7.44:1).
About this color
#21B213 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.217 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Kelly Green (#02AB2E), ΔE 0.028 away. Black text reads best on it, at 7.44:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.217) |
| Temperature | in between |
| Nearest name | Kelly Green (#02AB2E) |
| Black text | 7.44:1 |
| White text | 2.82:1 |
Values
| HEX | #21B213 |
| RGB | rgb(33, 178, 19) |
| HSL | hsl(115, 81%, 39%) |
| OKLCH | oklch(66.5% 0.217 142) |
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 #21B213 | 2.82:1 | Fails | Lc -58.8 | Large or bold text, headings |
| Black text on #21B213 | 7.44:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #21B213 text on white | 2.82:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #21B213 text on black | 7.44:1 | AAA | Lc -48.3 | 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
#F0F8EF
oklch(97.1% 0.015 142.2)
-
Step 100
100
#DFEFDD
oklch(93.5% 0.029 142.2)
-
Step 200
200
#C4E4C0
oklch(88.6% 0.059 142)
-
Step 300
300
#99D292
oklch(80.8% 0.106 141.9)
-
Step 400
400
#5ABA51
oklch(70.7% 0.17 142)
-
Step 500
500 (this color)
#21B213
oklch(66.5% 0.217 142)
-
Step 600
600
#0E8C00
oklch(55.6% 0.187 142)
-
Step 700
700
#0A7600
oklch(49.1% 0.165 142)
-
Step 800
800
#066100
oklch(42.8% 0.144 142)
-
Step 900
900
#045100
oklch(37.8% 0.127 142.1)
-
Step 950
950
#023001
oklch(26.9% 0.089 142.3)
#21B213 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) | #B6A000 | 0.153 |
| Deuteranopia (no green cones) | #A7962C | 0.151 |
| Tritanopia (no blue cones) | #00AC97 | 0.143 |
| Achromatopsia (no color) | #9A9A9A | 0.218 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21B213
#21B213
oklch(66.5% 0.217 142)
- #CE5AE1
#CE5AE1
oklch(66.5% 0.218 321.8)
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 #21B213, closest first.
No curated palette has a color within ΔE 0.04 of #21B213.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelly Green #02AB2E ΔE 0.028
- Shamrock #01B44C ΔE 0.036
- Leaf Green #5CA904 ΔE 0.040
- Leafy Green #51B73B ΔE 0.042
- Grass #5CAC2D ΔE 0.044
- Medium Green #39AD48 ΔE 0.044
- Frog Green #58BC08 ΔE 0.046
- Shamrock Green #02C14D ΔE 0.049
Use #21B213 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.