#21BF57
Closest named color: Shamrock Green (#02C14D). oklch(70.6% 0.191 148.8), rgb(33, 191, 87).
Aa
Black text reads best on this color (8.65:1).
About this color
#21BF57 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.191 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock Green (#02C14D), ΔE 0.015 away. Black text reads best on it, at 8.65:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.191) |
| Temperature | in between |
| Nearest name | Shamrock Green (#02C14D) |
| Black text | 8.65:1 |
| White text | 2.42:1 |
Values
| HEX | #21BF57 |
| RGB | rgb(33, 191, 87) |
| HSL | hsl(141, 71%, 44%) |
| OKLCH | oklch(70.6% 0.191 148.8) |
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 #21BF57 | 2.42:1 | Fails | Lc -52.1 | Large or bold text, headings |
| Black text on #21BF57 | 8.65:1 | AAA | Lc 56.8 | Large or bold text, headings |
| #21BF57 text on white | 2.42:1 | Fails | Lc 47.2 | Large or bold text, headings |
| #21BF57 text on black | 8.65:1 | AAA | Lc -54.9 | 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
#BCE6C1
oklch(88.5% 0.067 148.3)
-
Step 300
300
#88D696
oklch(80.9% 0.119 148.9)
-
Step 400
400 (this color)
#21BF57
oklch(70.6% 0.191 148.8)
-
Step 500
500
#00A546
oklch(63% 0.178 148.9)
-
Step 600
600
#008B39
oklch(55.6% 0.158 148.7)
-
Step 700
700
#00752F
oklch(49.1% 0.139 148.8)
-
Step 800
800
#006025
oklch(42.7% 0.121 148.7)
-
Step 900
900
#00501E
oklch(37.6% 0.107 148.8)
-
Step 950
950
#00300F
oklch(27% 0.076 148.8)
#21BF57 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) | #C1AE4D | 0.153 |
| Deuteranopia (no green cones) | #B0A25F | 0.152 |
| Tritanopia (no blue cones) | #00BBA8 | 0.110 |
| Achromatopsia (no color) | #A6A6A6 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21BF57
#21BF57
oklch(70.6% 0.191 148.8)
- #DE6EDA
#DE6EDA
oklch(70.6% 0.19 328.7)
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 #21BF57, closest first.
No curated palette has a color within ΔE 0.04 of #21BF57.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock Green #02C14D ΔE 0.015
- Algae Green #21C36F ΔE 0.027
- Cool Green #33B864 ΔE 0.029
- Leafy Green #51B73B ΔE 0.031
- Dark Mint Green #20C073 ΔE 0.032
- Shamrock #01B44C ΔE 0.034
- Dark Mint #48C072 ΔE 0.039
- Frog Green #58BC08 ΔE 0.047
Use #21BF57 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.