#21C136
Closest named color: Shamrock Green (#02C14D). oklch(70.8% 0.217 144.2), rgb(33, 193, 54).
Aa
Black text reads best on this color (8.74:1).
About this color
#21C136 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.217 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock Green (#02C14D), ΔE 0.018 away. Black text reads best on it, at 8.74:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.217) |
| Temperature | in between |
| Nearest name | Shamrock Green (#02C14D) |
| Black text | 8.74:1 |
| White text | 2.40:1 |
Values
| HEX | #21C136 |
| RGB | rgb(33, 193, 54) |
| HSL | hsl(128, 71%, 44%) |
| OKLCH | oklch(70.8% 0.217 144.2) |
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 #21C136 | 2.40:1 | Fails | Lc -51.6 | Large or bold text, headings |
| Black text on #21C136 | 8.74:1 | AAA | Lc 57.3 | Large or bold text, headings |
| #21C136 text on white | 2.40:1 | Fails | Lc 46.6 | Large or bold text, headings |
| #21C136 text on black | 8.74:1 | AAA | Lc -55.4 | 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
#EEF9EE
oklch(97.1% 0.019 145.4)
-
Step 100
100
#DBF1DA
oklch(93.6% 0.038 144.1)
-
Step 200
200
#BBE7BA
oklch(88.5% 0.076 144.3)
-
Step 300
300
#87D787
oklch(80.8% 0.136 144.2)
-
Step 400
400 (this color)
#21C136
oklch(70.8% 0.217 144.2)
-
Step 500
500
#00A624
oklch(63% 0.203 144.2)
-
Step 600
600
#008C1D
oklch(55.6% 0.179 144.2)
-
Step 700
700
#007617
oklch(49.1% 0.158 144.3)
-
Step 800
800
#006111
oklch(42.8% 0.138 144.2)
-
Step 900
900
#00510C
oklch(37.8% 0.122 144.2)
-
Step 950
950
#003005
oklch(26.9% 0.086 144.4)
#21C136 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) | #C5AE1E | 0.159 |
| Deuteranopia (no green cones) | #B4A344 | 0.158 |
| Tritanopia (no blue cones) | #00BCA6 | 0.137 |
| Achromatopsia (no color) | #A7A7A7 | 0.218 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21C136
#21C136
oklch(70.8% 0.217 144.2)
- #E067EB
#E067EB
oklch(70.8% 0.217 324.2)
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 #21C136, closest first.
No curated palette has a color within ΔE 0.04 of #21C136.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock Green #02C14D ΔE 0.018
- Frog Green #58BC08 ΔE 0.029
- Leafy Green #51B73B ΔE 0.036
- Lime Green #32CD32 ΔE 0.037
- Shamrock #01B44C ΔE 0.047
- Algae Green #21C36F ΔE 0.055
- Cool Green #33B864 ΔE 0.058
- Apple #6ECB3C ΔE 0.059
Use #21C136 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.