#63B559
Closest named color: Boring Green (#63B365). oklch(69.9% 0.151 141.6), rgb(99, 181, 89).
Aa
Black text reads best on this color (8.28:1).
About this color
#63B559 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.151 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.017 away. Black text reads best on it, at 8.28:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.28:1 |
| White text | 2.53:1 |
Values
| HEX | #63B559 |
| RGB | rgb(99, 181, 89) |
| HSL | hsl(113, 38%, 53%) |
| OKLCH | oklch(69.9% 0.151 141.6) |
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 #63B559 | 2.53:1 | Fails | Lc -54.6 | Large or bold text, headings |
| Black text on #63B559 | 8.28:1 | AAA | Lc 54.5 | Large or bold text, headings |
| #63B559 text on white | 2.53:1 | Fails | Lc 49.5 | Large or bold text, headings |
| #63B559 text on black | 8.28:1 | AAA | Lc -52.5 | 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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E0EFDE
oklch(93.6% 0.028 142)
-
Step 200
200
#C6E2C2
oklch(88.4% 0.052 141.7)
-
Step 300
300
#9ED097
oklch(80.8% 0.094 141.5)
-
Step 400
400 (this color)
#63B559
oklch(69.9% 0.151 141.6)
-
Step 500
500
#30A422
oklch(63% 0.193 141.6)
-
Step 600
600
#168C00
oklch(55.7% 0.186 141.6)
-
Step 700
700
#117600
oklch(49.2% 0.164 141.6)
-
Step 800
800
#0C6100
oklch(42.9% 0.143 141.6)
-
Step 900
900
#085100
oklch(37.8% 0.126 141.6)
-
Step 950
950
#0A2F06
oklch(26.9% 0.079 141.5)
#63B559 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) | #B9A751 | 0.108 |
| Deuteranopia (no green cones) | #AEA05F | 0.107 |
| Tritanopia (no blue cones) | #5AB0A0 | 0.099 |
| Achromatopsia (no color) | #A3A3A3 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B559
#63B559
oklch(69.9% 0.151 141.6)
- #C97CD6
#C97CD6
oklch(70% 0.151 321.6)
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 #63B559, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.017
- Turtle Green #75B84F ΔE 0.022
- Dark Pastel Green #56AE57 ΔE 0.025
- Cool Green #33B864 ΔE 0.031
- Asparagus #77AB56 ΔE 0.032
- Fern #63A950 ΔE 0.033
- Dark Mint #48C072 ΔE 0.035
- Leafy Green #51B73B ΔE 0.037
Use #63B559 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.