#63BC37
Closest named color: Leafy Green (#51B73B). oklch(71.3% 0.188 137.3), rgb(99, 188, 55).
Aa
Black text reads best on this color (8.77:1).
About this color
#63BC37 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.188 and its hue 137°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.022 away. Black text reads best on it, at 8.77:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.188) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 8.77:1 |
| White text | 2.39:1 |
Values
| HEX | #63BC37 |
| RGB | rgb(99, 188, 55) |
| HSL | hsl(100, 55%, 48%) |
| OKLCH | oklch(71.3% 0.188 137.3) |
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 #63BC37 | 2.39:1 | Fails | Lc -51.8 | Large or bold text, headings |
| Black text on #63BC37 | 8.77:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #63BC37 text on white | 2.39:1 | Fails | Lc 46.8 | Large or bold text, headings |
| #63BC37 text on black | 8.77:1 | AAA | Lc -55.2 | 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
#F1F8EE
oklch(97.1% 0.015 136.1)
-
Step 100
100
#DFF0DA
oklch(93.7% 0.034 138.6)
-
Step 200
200
#C5E4BA
oklch(88.5% 0.065 137.5)
-
Step 300
300
#9CD387
oklch(81% 0.118 137.4)
-
Step 400
400 (this color)
#63BC37
oklch(71.3% 0.188 137.3)
-
Step 500
500
#47A200
oklch(63.1% 0.192 137.2)
-
Step 600
600
#3A8800
oklch(55.5% 0.169 137.3)
-
Step 700
700
#307300
oklch(49.2% 0.15 137.3)
-
Step 800
800
#265E00
oklch(42.7% 0.13 137.2)
-
Step 900
900
#1E4E00
oklch(37.5% 0.114 137.3)
-
Step 950
950
#0F2F00
oklch(27% 0.083 137.4)
#63BC37 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) | #C2AC21 | 0.119 |
| Deuteranopia (no green cones) | #B6A544 | 0.119 |
| Tritanopia (no blue cones) | #5EB5A2 | 0.133 |
| Achromatopsia (no color) | #A7A7A7 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63BC37
#63BC37
oklch(71.3% 0.188 137.3)
- #D177EE
#D177EE
oklch(71.3% 0.188 317.4)
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 #63BC37, closest first.
No curated palette has a color within ΔE 0.04 of #63BC37.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.022
- Frog Green #58BC08 ΔE 0.024
- Dark Lime Green #7EBD01 ΔE 0.030
- Turtle Green #75B84F ΔE 0.033
- Dark Lime #84B701 ΔE 0.033
- Shamrock Green #02C14D ΔE 0.041
- Apple #6ECB3C ΔE 0.044
- Grass #5CAC2D ΔE 0.046
Use #63BC37 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.