#21BF5E
Closest named color: Algae Green (#21C36F). oklch(70.7% 0.185 150.2), rgb(33, 191, 94).
Aa
Black text reads best on this color (8.67:1).
About this color
#21BF5E is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.185 and its hue 150°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.020 away. Black text reads best on it, at 8.67:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.185) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 8.67:1 |
| White text | 2.41:1 |
Values
| HEX | #21BF5E |
| RGB | rgb(33, 191, 94) |
| HSL | hsl(143, 71%, 44%) |
| OKLCH | oklch(70.7% 0.185 150.2) |
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 #21BF5E | 2.41:1 | Fails | Lc -52.0 | Large or bold text, headings |
| Black text on #21BF5E | 8.67:1 | AAA | Lc 56.9 | Large or bold text, headings |
| #21BF5E text on white | 2.41:1 | Fails | Lc 47.1 | Large or bold text, headings |
| #21BF5E text on black | 8.67:1 | AAA | Lc -55.0 | 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
#EFF9F0
oklch(97.2% 0.016 148.4)
-
Step 100
100
#DBF1DE
oklch(93.7% 0.034 149.3)
-
Step 200
200
#BCE6C3
oklch(88.6% 0.065 149.8)
-
Step 300
300
#88D699
oklch(80.9% 0.116 150.1)
-
Step 400
400 (this color)
#21BF5E
oklch(70.7% 0.185 150.2)
-
Step 500
500
#00A54C
oklch(63.1% 0.173 150.1)
-
Step 600
600
#008B3F
oklch(55.7% 0.153 150.2)
-
Step 700
700
#007534
oklch(49.2% 0.135 150.2)
-
Step 800
800
#006029
oklch(42.7% 0.118 150)
-
Step 900
900
#005021
oklch(37.7% 0.104 150)
-
Step 950
950
#003011
oklch(27% 0.074 150)
#21BF5E 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) | #C0AE56 | 0.152 |
| Deuteranopia (no green cones) | #AFA265 | 0.150 |
| Tritanopia (no blue cones) | #00BCA9 | 0.103 |
| Achromatopsia (no color) | #A7A7A7 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21BF5E
#21BF5E
oklch(70.7% 0.185 150.2)
- #DE6FD6
#DE6FD6
oklch(70.6% 0.185 330.1)
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 #21BF5E, closest first.
No curated palette has a color within ΔE 0.04 of #21BF5E.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.020
- Shamrock Green #02C14D ΔE 0.022
- Cool Green #33B864 ΔE 0.024
- Dark Mint Green #20C073 ΔE 0.024
- Dark Mint #48C072 ΔE 0.033
- Leafy Green #51B73B ΔE 0.035
- Shamrock #01B44C ΔE 0.036
- Green Teal #0CB577 ΔE 0.049
Use #21BF5E 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.