#63B40B
Closest named color: Leafy Green (#51B73B). oklch(69.1% 0.196 134.3), rgb(99, 180, 11).
Aa
Black text reads best on this color (8.06:1).
About this color
#63B40B is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.196 and its hue 134°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.023 away. Black text reads best on it, at 8.06:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.196) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 8.06:1 |
| White text | 2.60:1 |
Values
| HEX | #63B40B |
| RGB | rgb(99, 180, 11) |
| HSL | hsl(89, 88%, 37%) |
| OKLCH | oklch(69.1% 0.196 134.3) |
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 #63B40B | 2.60:1 | Fails | Lc -55.6 | Large or bold text, headings |
| Black text on #63B40B | 8.06:1 | AAA | Lc 53.5 | Large or bold text, headings |
| #63B40B text on white | 2.60:1 | Fails | Lc 50.5 | Large or bold text, headings |
| #63B40B text on black | 8.06:1 | AAA | Lc -51.4 | 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
#F1F8ED
oklch(97.1% 0.016 133.8)
-
Step 100
100
#E0F0D8
oklch(93.7% 0.036 135)
-
Step 200
200
#C7E4B6
oklch(88.6% 0.069 134)
-
Step 300
300
#9FD280
oklch(80.9% 0.122 134.4)
-
Step 400
400 (this color)
#63B40B
oklch(69.1% 0.196 134.3)
-
Step 500
500
#569F00
oklch(63% 0.181 134.2)
-
Step 600
600
#478600
oklch(55.6% 0.16 134.3)
-
Step 700
700
#3B7100
oklch(49.2% 0.142 134.3)
-
Step 800
800
#2F5C00
oklch(42.5% 0.123 134.3)
-
Step 900
900
#274D00
oklch(37.7% 0.108 134.1)
-
Step 950
950
#152E00
oklch(27% 0.078 134)
#63B40B 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) | #BBA400 | 0.117 |
| Deuteranopia (no green cones) | #B19E28 | 0.116 |
| Tritanopia (no blue cones) | #62AD99 | 0.145 |
| Achromatopsia (no color) | #A0A0A0 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B40B
#63B40B
oklch(69.1% 0.196 134.3)
- #C76FEE
#C76FEE
oklch(69% 0.196 314.4)
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 #63B40B, closest first.
No curated palette has a color within ΔE 0.04 of #63B40B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.023
- Frog Green #58BC08 ΔE 0.023
- Grass #5CAC2D ΔE 0.030
- Leaf Green #5CA904 ΔE 0.033
- Dark Lime #84B701 ΔE 0.037
- Dark Lime Green #7EBD01 ΔE 0.040
- Leaf #71AA34 ΔE 0.041
- Turtle Green #75B84F ΔE 0.048
Use #63B40B 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.