#21AB33
Closest named color: Kelly Green (#02AB2E). oklch(64.8% 0.195 144.4), rgb(33, 171, 51).
Aa
Black text reads best on this color (6.93:1).
About this color
#21AB33 is a medium-light, vivid green. In OKLCH its lightness is 65%, its chroma 0.195 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Kelly Green (#02AB2E), ΔE 0.008 away. Black text reads best on it, at 6.93:1.
| Hue family | Greens |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.195) |
| Temperature | in between |
| Nearest name | Kelly Green (#02AB2E) |
| Black text | 6.93:1 |
| White text | 3.02:1 |
Values
| HEX | #21AB33 |
| RGB | rgb(33, 171, 51) |
| HSL | hsl(128, 68%, 40%) |
| OKLCH | oklch(64.8% 0.195 144.4) |
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 #21AB33 | 3.02:1 | AA large text | Lc -61.8 | Content text, not long reading |
| Black text on #21AB33 | 6.93:1 | AA | Lc 47.6 | Large or bold text, headings |
| #21AB33 text on white | 3.02:1 | AA large text | Lc 56.4 | Large or bold text, headings |
| #21AB33 text on black | 6.93:1 | AA | Lc -45.3 | 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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDF
oklch(93.6% 0.027 145.4)
-
Step 200
200
#C5E3C4
oklch(88.6% 0.053 144.3)
-
Step 300
300
#9AD19A
oklch(80.8% 0.095 144.6)
-
Step 400
400
#5DB960
oklch(70.8% 0.153 144.4)
-
Step 500
500 (this color)
#21AB33
oklch(64.8% 0.195 144.4)
-
Step 600
600
#008C1F
oklch(55.6% 0.178 144.4)
-
Step 700
700
#007618
oklch(49.1% 0.157 144.4)
-
Step 800
800
#006112
oklch(42.8% 0.137 144.4)
-
Step 900
900
#00510D
oklch(37.8% 0.121 144.3)
-
Step 950
950
#043008
oklch(27% 0.081 144.3)
#21AB33 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) | #AE9A21 | 0.143 |
| Deuteranopia (no green cones) | #9F903F | 0.143 |
| Tritanopia (no blue cones) | #00A693 | 0.122 |
| Achromatopsia (no color) | #949494 | 0.196 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21AB33
#21AB33
oklch(64.8% 0.195 144.4)
- #C65CCF
#C65CCF
oklch(64.7% 0.194 324.4)
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 #21AB33, closest first.
No curated palette has a color within ΔE 0.04 of #21AB33.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Kelly Green #02AB2E ΔE 0.008
- Medium Green #39AD48 ΔE 0.024
- Shamrock #01B44C ΔE 0.028
- Leaf Green #5CA904 ΔE 0.036
- Grass #5CAC2D ΔE 0.037
- Mid Green #50A747 ΔE 0.038
- Grassy Green #419C03 ΔE 0.042
- Grass Green #3F9B0B ΔE 0.044
Use #21AB33 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.