#63B666
Closest named color: Boring Green (#63B365). oklch(70.4% 0.14 144.6), rgb(99, 182, 102).
Aa
Black text reads best on this color (8.41:1).
About this color
#63B666 is a medium-light, moderately saturated green. In OKLCH its lightness is 70%, its chroma 0.140 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.008 away. Black text reads best on it, at 8.41:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.140) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.41:1 |
| White text | 2.49:1 |
Values
| HEX | #63B666 |
| RGB | rgb(99, 182, 102) |
| HSL | hsl(122, 36%, 55%) |
| OKLCH | oklch(70.4% 0.14 144.6) |
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 #63B666 | 2.49:1 | Fails | Lc -53.9 | Large or bold text, headings |
| Black text on #63B666 | 8.41:1 | AAA | Lc 55.2 | Large or bold text, headings |
| #63B666 text on white | 2.49:1 | Fails | Lc 48.8 | Large or bold text, headings |
| #63B666 text on black | 8.41:1 | AAA | Lc -53.2 | 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
#F1F8F1
oklch(97.2% 0.012 145.5)
-
Step 100
100
#E0EFE0
oklch(93.7% 0.026 145.4)
-
Step 200
200
#C6E2C6
oklch(88.5% 0.048 145.2)
-
Step 300
300
#9ED09E
oklch(80.9% 0.087 144.7)
-
Step 400
400 (this color)
#63B666
oklch(70.4% 0.14 144.6)
-
Step 500
500
#2CA43A
oklch(63.2% 0.179 144.7)
-
Step 600
600
#008C21
oklch(55.6% 0.177 144.7)
-
Step 700
700
#00761A
oklch(49.2% 0.156 144.6)
-
Step 800
800
#006114
oklch(42.8% 0.136 144.7)
-
Step 900
900
#045011
oklch(37.6% 0.116 144.7)
-
Step 950
950
#082F0C
oklch(26.9% 0.074 144.7)
#63B666 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) | #B9A960 | 0.107 |
| Deuteranopia (no green cones) | #ADA16B | 0.105 |
| Tritanopia (no blue cones) | #58B2A3 | 0.087 |
| Achromatopsia (no color) | #A4A4A4 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B666
#63B666
oklch(70.4% 0.14 144.6)
- #CB7FD0
#CB7FD0
oklch(70.4% 0.141 324.7)
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 #63B666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.008
- Turtle Green #75B84F ΔE 0.029
- Dark Mint #48C072 ΔE 0.030
- Dark Pastel Green #56AE57 ΔE 0.030
- Asparagus #77AB56 ΔE 0.033
- Medium Sea Green #3CB371 ΔE 0.033
- Cool Green #33B864 ΔE 0.033
- Algae #54AC68 ΔE 0.034
Use #63B666 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.