#63AC37
Closest named color: Grass (#5CAC2D). oklch(67.3% 0.167 135.9), rgb(99, 172, 55).
Aa
Black text reads best on this color (7.48:1).
About this color
#63AC37 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.167 and its hue 136°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.011 away. Black text reads best on it, at 7.48:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.167) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.48:1 |
| White text | 2.80:1 |
Values
| HEX | #63AC37 |
| RGB | rgb(99, 172, 55) |
| HSL | hsl(97, 52%, 45%) |
| OKLCH | oklch(67.3% 0.167 135.9) |
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 #63AC37 | 2.80:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #63AC37 | 7.48:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #63AC37 text on white | 2.80:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #63AC37 text on black | 7.48:1 | AAA | Lc -48.1 | 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
#F1F8EF
oklch(97.1% 0.014 138.7)
-
Step 100
100
#E1EFDB
oklch(93.6% 0.03 136.1)
-
Step 200
200
#C8E2BD
oklch(88.4% 0.057 136.4)
-
Step 300
300
#A2D08C
oklch(80.8% 0.104 135.9)
-
Step 400
400 (this color)
#63AC37
oklch(67.3% 0.167 135.9)
-
Step 500
500
#4EA100
oklch(63.1% 0.188 136)
-
Step 600
600
#418700
oklch(55.5% 0.165 135.8)
-
Step 700
700
#357200
oklch(49.1% 0.146 136)
-
Step 800
800
#2B5D00
oklch(42.6% 0.126 135.7)
-
Step 900
900
#224E00
oklch(37.7% 0.112 136.1)
-
Step 950
950
#122E00
oklch(26.8% 0.079 135.7)
#63AC37 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) | #B29E27 | 0.103 |
| Deuteranopia (no green cones) | #A89841 | 0.104 |
| Tritanopia (no blue cones) | #60A694 | 0.119 |
| Achromatopsia (no color) | #9A9A9A | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AC37
#63AC37
oklch(67.3% 0.167 135.9)
- #BD71DA
#BD71DA
oklch(67.1% 0.168 316)
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 #63AC37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.011
- Leaf #71AA34 ΔE 0.014
- Leaf Green #5CA904 ΔE 0.026
- Fern #63A950 ΔE 0.027
- Mid Green #50A747 ΔE 0.028
- Dark Pastel Green #56AE57 ΔE 0.028
- Medium Green #39AD48 ΔE 0.031
- Leafy Green #51B73B ΔE 0.032
Use #63AC37 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.