#63B555
Closest named color: Boring Green (#63B365). oklch(69.9% 0.155 140.8), rgb(99, 181, 85).
Aa
Black text reads best on this color (8.27:1).
About this color
#63B555 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.155 and its hue 141°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.021 away. Black text reads best on it, at 8.27:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.155) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.27:1 |
| White text | 2.53:1 |
Values
| HEX | #63B555 |
| RGB | rgb(99, 181, 85) |
| HSL | hsl(111, 39%, 52%) |
| OKLCH | oklch(69.9% 0.155 140.8) |
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 #63B555 | 2.53:1 | Fails | Lc -54.6 | Large or bold text, headings |
| Black text on #63B555 | 8.27:1 | AAA | Lc 54.5 | Large or bold text, headings |
| #63B555 text on white | 2.53:1 | Fails | Lc 49.5 | Large or bold text, headings |
| #63B555 text on black | 8.27:1 | AAA | Lc -52.4 | 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
#F1F8F0
oklch(97.2% 0.013 141.8)
-
Step 100
100
#E0EFDD
oklch(93.6% 0.029 140.5)
-
Step 200
200
#C6E3C1
oklch(88.6% 0.055 141)
-
Step 300
300
#9ED196
oklch(81% 0.097 141.2)
-
Step 400
400 (this color)
#63B555
oklch(69.9% 0.155 140.8)
-
Step 500
500
#31A416
oklch(63% 0.198 140.8)
-
Step 600
600
#208B00
oklch(55.6% 0.182 140.8)
-
Step 700
700
#197500
oklch(49.1% 0.161 140.9)
-
Step 800
800
#136000
oklch(42.7% 0.14 140.8)
-
Step 900
900
#0E5000
oklch(37.6% 0.123 140.9)
-
Step 950
950
#0A2F04
oklch(26.9% 0.081 140.8)
#63B555 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) | #B9A74C | 0.108 |
| Deuteranopia (no green cones) | #AEA05C | 0.108 |
| Tritanopia (no blue cones) | #5BB09F | 0.102 |
| Achromatopsia (no color) | #A2A2A2 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B555
#63B555
oklch(69.9% 0.155 140.8)
- #C97BD8
#C97BD8
oklch(69.9% 0.155 321)
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 #63B555, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.021
- Turtle Green #75B84F ΔE 0.021
- Dark Pastel Green #56AE57 ΔE 0.025
- Cool Green #33B864 ΔE 0.032
- Leafy Green #51B73B ΔE 0.033
- Asparagus #77AB56 ΔE 0.034
- Fern #63A950 ΔE 0.034
- Leaf #71AA34 ΔE 0.035
Use #63B555 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.