#63AA1B
Closest named color: Grass (#5CAC2D). oklch(66.6% 0.18 133.6), rgb(99, 170, 27).
Aa
Black text reads best on this color (7.29:1).
About this color
#63AA1B is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.180 and its hue 134°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass (#5CAC2D), ΔE 0.010 away. Black text reads best on it, at 7.29:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.180) |
| Temperature | in between |
| Nearest name | Grass (#5CAC2D) |
| Black text | 7.29:1 |
| White text | 2.87:1 |
Values
| HEX | #63AA1B |
| RGB | rgb(99, 170, 27) |
| HSL | hsl(90, 73%, 39%) |
| OKLCH | oklch(66.6% 0.18 133.6) |
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 #63AA1B | 2.87:1 | Fails | Lc -60.0 | Content text, not long reading |
| Black text on #63AA1B | 7.29:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #63AA1B text on white | 2.87:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #63AA1B text on black | 7.29:1 | AAA | Lc -47.1 | 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 500.
-
Step 50
50
#F2F7EF
oklch(97% 0.012 133.4)
-
Step 100
100
#E3EEDD
oklch(93.6% 0.025 134.3)
-
Step 200
200
#CCE1C0
oklch(88.5% 0.05 134.1)
-
Step 300
300
#AACD93
oklch(80.8% 0.087 133.4)
-
Step 400
400
#7CB353
oklch(70.7% 0.14 133.5)
-
Step 500
500 (this color)
#63AA1B
oklch(66.6% 0.18 133.6)
-
Step 600
600
#4A8600
oklch(55.7% 0.159 133.6)
-
Step 700
700
#3D7000
oklch(49% 0.14 133.6)
-
Step 800
800
#315C00
oklch(42.6% 0.122 133.6)
-
Step 900
900
#284D00
oklch(37.7% 0.108 133.7)
-
Step 950
950
#162E02
oklch(27.1% 0.075 134)
#63AA1B 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) | #B19C00 | 0.104 |
| Deuteranopia (no green cones) | #A8962D | 0.105 |
| Tritanopia (no blue cones) | #63A391 | 0.134 |
| Achromatopsia (no color) | #989898 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63AA1B
#63AA1B
oklch(66.6% 0.18 133.6)
- #BB6DE0
#BB6DE0
oklch(66.6% 0.18 313.8)
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 #63AA1B, closest first.
No curated palette has a color within ΔE 0.04 of #63AA1B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass #5CAC2D ΔE 0.010
- Leaf Green #5CA904 ΔE 0.011
- Leaf #71AA34 ΔE 0.023
- Mid Green #50A747 ΔE 0.036
- Leafy Green #51B73B ΔE 0.036
- Medium Green #39AD48 ΔE 0.037
- Fern #63A950 ΔE 0.041
- Avocado Green #87A922 ΔE 0.042
Use #63AA1B 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.