#21B938
Closest named color: Shamrock Green (#02C14D). oklch(68.6% 0.207 144.6), rgb(33, 185, 56).
Aa
Black text reads best on this color (8.06:1).
About this color
#21B938 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.207 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock Green (#02C14D), ΔE 0.024 away. Black text reads best on it, at 8.06:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.207) |
| Temperature | in between |
| Nearest name | Shamrock Green (#02C14D) |
| Black text | 8.06:1 |
| White text | 2.60:1 |
Values
| HEX | #21B938 |
| RGB | rgb(33, 185, 56) |
| HSL | hsl(129, 70%, 43%) |
| OKLCH | oklch(68.6% 0.207 144.6) |
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 #21B938 | 2.60:1 | Fails | Lc -55.4 | Large or bold text, headings |
| Black text on #21B938 | 8.06:1 | AAA | Lc 53.8 | Large or bold text, headings |
| #21B938 text on white | 2.60:1 | Fails | Lc 50.2 | Large or bold text, headings |
| #21B938 text on black | 8.06:1 | AAA | Lc -51.7 | 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
#EFF9EE
oklch(97.2% 0.018 142.8)
-
Step 100
100
#DBF1DB
oklch(93.6% 0.037 145.3)
-
Step 200
200
#BDE6BC
oklch(88.5% 0.071 144.3)
-
Step 300
300
#8AD78B
oklch(81% 0.13 144.5)
-
Step 400
400 (this color)
#21B938
oklch(68.6% 0.207 144.6)
-
Step 500
500
#00A628
oklch(63% 0.201 144.6)
-
Step 600
600
#008C20
oklch(55.6% 0.177 144.6)
-
Step 700
700
#00761A
oklch(49.2% 0.156 144.6)
-
Step 800
800
#006113
oklch(42.8% 0.136 144.5)
-
Step 900
900
#00510F
oklch(37.8% 0.12 144.7)
-
Step 950
950
#003006
oklch(26.9% 0.085 144.8)
#21B938 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) | #BCA725 | 0.152 |
| Deuteranopia (no green cones) | #AC9C45 | 0.153 |
| Tritanopia (no blue cones) | #00B49F | 0.129 |
| Achromatopsia (no color) | #A0A0A0 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21B938
#21B938
oklch(68.6% 0.207 144.6)
- #D763E0
#D763E0
oklch(68.6% 0.208 324.7)
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 #21B938, closest first.
No curated palette has a color within ΔE 0.04 of #21B938.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock Green #02C14D ΔE 0.024
- Leafy Green #51B73B ΔE 0.026
- Shamrock #01B44C ΔE 0.026
- Frog Green #58BC08 ΔE 0.035
- Medium Green #39AD48 ΔE 0.042
- Kelly Green #02AB2E ΔE 0.042
- Grass #5CAC2D ΔE 0.044
- Cool Green #33B864 ΔE 0.047
Use #21B938 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.