#63B561
Closest named color: Boring Green (#63B365). oklch(70.1% 0.143 143.4), rgb(99, 181, 97).
Aa
Black text reads best on this color (8.31:1).
About this color
#63B561 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.143 and its hue 143°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.009 away. Black text reads best on it, at 8.31:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.31:1 |
| White text | 2.52:1 |
Values
| HEX | #63B561 |
| RGB | rgb(99, 181, 97) |
| HSL | hsl(119, 36%, 55%) |
| OKLCH | oklch(70.1% 0.143 143.4) |
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 #63B561 | 2.52:1 | Fails | Lc -54.4 | Large or bold text, headings |
| Black text on #63B561 | 8.31:1 | AAA | Lc 54.7 | Large or bold text, headings |
| #63B561 text on white | 2.52:1 | Fails | Lc 49.3 | Large or bold text, headings |
| #63B561 text on black | 8.31:1 | AAA | Lc -52.6 | 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
#E0EFDF
oklch(93.7% 0.027 143.6)
-
Step 200
200
#C6E2C5
oklch(88.4% 0.049 144.2)
-
Step 300
300
#9ED09B
oklch(80.9% 0.09 143.3)
-
Step 400
400 (this color)
#63B561
oklch(70.1% 0.143 143.4)
-
Step 500
500
#2FA432
oklch(63.1% 0.184 143.3)
-
Step 600
600
#008C13
oklch(55.5% 0.183 143.4)
-
Step 700
700
#00760E
oklch(49.1% 0.162 143.4)
-
Step 800
800
#00610A
oklch(42.7% 0.141 143.4)
-
Step 900
900
#07500C
oklch(37.6% 0.119 143.4)
-
Step 950
950
#092F0A
oklch(26.9% 0.075 143.5)
#63B561 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) | #B8A85A | 0.106 |
| Deuteranopia (no green cones) | #ADA066 | 0.106 |
| Tritanopia (no blue cones) | #59B1A1 | 0.090 |
| Achromatopsia (no color) | #A3A3A3 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63B561
#63B561
oklch(70.1% 0.143 143.4)
- #C97ED1
#C97ED1
oklch(70.1% 0.143 323.5)
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 #63B561, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.009
- Dark Pastel Green #56AE57 ΔE 0.026
- Turtle Green #75B84F ΔE 0.027
- Asparagus #77AB56 ΔE 0.030
- Cool Green #33B864 ΔE 0.032
- Dark Mint #48C072 ΔE 0.033
- Medium Sea Green #3CB371 ΔE 0.033
- Algae #54AC68 ΔE 0.034
Use #63B561 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.