#21AC71
Closest named color: Seaweed Green (#35AD6B). oklch(66% 0.144 158.9), rgb(33, 172, 113).
Aa
Black text reads best on this color (7.20:1).
About this color
#21AC71 is a medium-light, vivid green. In OKLCH its lightness is 66%, its chroma 0.144 and its hue 159°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Seaweed Green (#35AD6B), ΔE 0.012 away. Black text reads best on it, at 7.20:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Seaweed Green (#35AD6B) |
| Black text | 7.20:1 |
| White text | 2.91:1 |
Values
| HEX | #21AC71 |
| RGB | rgb(33, 172, 113) |
| HSL | hsl(155, 68%, 40%) |
| OKLCH | oklch(66% 0.144 158.9) |
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 #21AC71 | 2.91:1 | Fails | Lc -60.3 | Content text, not long reading |
| Black text on #21AC71 | 7.20:1 | AAA | Lc 49.0 | Large or bold text, headings |
| #21AC71 text on white | 2.91:1 | Fails | Lc 55.0 | Large or bold text, headings |
| #21AC71 text on black | 7.20:1 | AAA | Lc -46.8 | 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
#F0F7F3
oklch(97% 0.009 161.4)
-
Step 100
100
#DFEEE5
oklch(93.5% 0.02 159.7)
-
Step 200
200
#C4E1D0
oklch(88.4% 0.038 159.8)
-
Step 300
300
#9ACFB0
oklch(80.9% 0.07 158.7)
-
Step 400
400
#5BB687
oklch(70.7% 0.112 159.1)
-
Step 500
500 (this color)
#21AC71
oklch(66% 0.144 158.9)
-
Step 600
600
#008957
oklch(55.5% 0.128 159.1)
-
Step 700
700
#007348
oklch(49% 0.113 158.9)
-
Step 800
800
#005F3A
oklch(42.8% 0.099 158.5)
-
Step 900
900
#004F30
oklch(37.7% 0.087 158.9)
-
Step 950
950
#032F1B
oklch(27% 0.06 158.3)
#21AC71 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) | #AA9E6D | 0.133 |
| Deuteranopia (no green cones) | #9A9275 | 0.131 |
| Tritanopia (no blue cones) | #00AB9D | 0.064 |
| Achromatopsia (no color) | #979797 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21AC71
#21AC71
oklch(66% 0.144 158.9)
- #CA6CAF
#CA6CAF
oklch(66% 0.144 339)
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 #21AC71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Seaweed Green #35AD6B ΔE 0.012
- Jade Green #2BAF6A ΔE 0.015
- Jade #1FA774 ΔE 0.017
- Bluey Green #2BB179 ΔE 0.017
- Dark Seafoam Green #3EAF76 ΔE 0.019
- Green Teal #0CB577 ΔE 0.025
- Dark Seafoam #1FB57A ΔE 0.026
- Medium Sea Green #3CB371 ΔE 0.026
Use #21AC71 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.