#21C361
Closest named color: Algae Green (#21C36F). oklch(71.8% 0.187 150.4), rgb(33, 195, 97).
Aa
Black text reads best on this color (9.04:1).
About this color
#21C361 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.187 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 0.016 away. Black text reads best on it, at 9.04:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.187) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.04:1 |
| White text | 2.32:1 |
Values
| HEX | #21C361 |
| RGB | rgb(33, 195, 97) |
| HSL | hsl(144, 71%, 45%) |
| OKLCH | oklch(71.8% 0.187 150.4) |
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 #21C361 | 2.32:1 | Fails | Lc -50.1 | Large or bold text, headings |
| Black text on #21C361 | 9.04:1 | AAA | Lc 58.8 | Large or bold text, headings |
| #21C361 text on white | 2.32:1 | Fails | Lc 45.2 | Large or bold text, headings |
| #21C361 text on black | 9.04:1 | AAA | Lc -56.9 | 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
#EEF9F0
oklch(97.1% 0.017 151.1)
-
Step 100
100
#DBF1DE
oklch(93.7% 0.034 149.3)
-
Step 200
200
#BBE6C3
oklch(88.5% 0.065 150.4)
-
Step 300
300
#87D699
oklch(80.9% 0.116 150.4)
-
Step 400
400 (this color)
#21C361
oklch(71.8% 0.187 150.4)
-
Step 500
500
#00A54D
oklch(63.1% 0.172 150.4)
-
Step 600
600
#008B40
oklch(55.7% 0.152 150.4)
-
Step 700
700
#007535
oklch(49.2% 0.134 150.5)
-
Step 800
800
#00602A
oklch(42.8% 0.117 150.4)
-
Step 900
900
#005022
oklch(37.7% 0.103 150.5)
-
Step 950
950
#003012
oklch(27% 0.073 150.7)
#21C361 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) | #C4B259 | 0.154 |
| Deuteranopia (no green cones) | #B3A568 | 0.153 |
| Tritanopia (no blue cones) | #00C0AC | 0.102 |
| Achromatopsia (no color) | #AAAAAA | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21C361
#21C361
oklch(71.8% 0.187 150.4)
- #E372DA
#E372DA
oklch(71.8% 0.187 330.4)
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 #21C361, closest first.
No curated palette has a color within ΔE 0.04 of #21C361.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.016
- Shamrock Green #02C14D ΔE 0.023
- Dark Mint Green #20C073 ΔE 0.025
- Dark Mint #48C072 ΔE 0.032
- Cool Green #33B864 ΔE 0.033
- Leafy Green #51B73B ΔE 0.041
- Seaweed #18D17B ΔE 0.043
- Shamrock #01B44C ΔE 0.046
Use #21C361 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.