#639963
Closest named color: Moss (#769958). oklch(63.1% 0.098 144.3), rgb(99, 153, 99).
Aa
Black text reads best on this color (6.26:1).
About this color
#639963 is a medium-light, moderately saturated green. In OKLCH its lightness is 63%, its chroma 0.098 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Moss (#769958), ΔE 0.024 away. Black text reads best on it, at 6.26:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Moss (#769958) |
| Black text | 6.26:1 |
| White text | 3.35:1 |
Values
| HEX | #639963 |
| RGB | rgb(99, 153, 99) |
| HSL | hsl(120, 21%, 49%) |
| OKLCH | oklch(63.1% 0.098 144.3) |
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 #639963 | 3.35:1 | AA large text | Lc -66.3 | Content text, not long reading |
| Black text on #639963 | 6.26:1 | AA | Lc 43.2 | Non-text elements, placeholder text |
| #639963 text on white | 3.35:1 | AA large text | Lc 60.8 | Content text, not long reading |
| #639963 text on black | 6.26:1 | AA | Lc -40.9 | Non-text elements, placeholder text |
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
#F3F7F3
oklch(97.2% 0.007 145.5)
-
Step 100
100
#E4ECE4
oklch(93.5% 0.014 145.5)
-
Step 200
200
#CFDECE
oklch(88.5% 0.027 143.6)
-
Step 300
300
#AEC9AE
oklch(80.8% 0.047 145.1)
-
Step 400
400
#83AE83
oklch(70.8% 0.077 144.7)
-
Step 500
500 (this color)
#639963
oklch(63.1% 0.098 144.3)
-
Step 600
600
#49834A
oklch(55.5% 0.106 144.3)
-
Step 700
700
#3A6F3B
oklch(49.1% 0.099 144.3)
-
Step 800
800
#305B31
oklch(42.8% 0.083 144.4)
-
Step 900
900
#2B4A2B
oklch(37.6% 0.064 144.2)
-
Step 950
950
#1A2C1A
oklch(27.1% 0.04 144.4)
#639963 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) | #9B905F | 0.075 |
| Deuteranopia (no green cones) | #938A66 | 0.075 |
| Tritanopia (no blue cones) | #5D968B | 0.060 |
| Achromatopsia (no color) | #8C8C8C | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #639963
#639963
oklch(63.1% 0.098 144.3)
- #A774AB
#A774AB
oklch(63% 0.099 324.2)
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 #639963, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Moss #769958 ΔE 0.024
- Drab Green #749551 ΔE 0.025
- Flat Green #699D4C ΔE 0.033
- Muted Green #5FA052 ΔE 0.034
- Ocean Green #3D9973 ΔE 0.037
- Light Forest Green #4F9153 ΔE 0.038
- Green Grey #77926F ΔE 0.039
- Camo #7F8F4E ΔE 0.041
Use #639963 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.