#646C3F
Closest named color: Dark Moss Green (#606C38). oklch(51.3% 0.066 117), rgb(100, 108, 63).
Aa
White text reads best on this color (5.58:1).
About this color
#646C3F is a medium-dark, muted yellow. In OKLCH its lightness is 51%, its chroma 0.066 and its hue 117°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.011 away. White text reads best on it, at 5.58:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.066) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.75:1 |
| White text | 5.58:1 |
Values
| HEX | #646C3F |
| RGB | rgb(100, 108, 63) |
| HSL | hsl(71, 26%, 34%) |
| OKLCH | oklch(51.3% 0.066 117) |
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 #646C3F | 5.58:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #646C3F | 3.75:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #646C3F text on white | 5.58:1 | AA | Lc 77.9 | Fine for body text |
| #646C3F text on black | 3.75:1 | AA large text | Lc -23.9 | Dividers and decoration only |
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 700.
-
Step 50
50
#F5F6F3
oklch(97.2% 0.004 121.6)
-
Step 100
100
#E9EBE4
oklch(93.7% 0.01 119.6)
-
Step 200
200
#D8DBCE
oklch(88.6% 0.018 117.3)
-
Step 300
300
#BFC4AD
oklch(81% 0.032 117.1)
-
Step 400
400
#9EA581
oklch(70.7% 0.051 116.7)
-
Step 500
500
#868F61
oklch(63.1% 0.066 117.3)
-
Step 600
600
#707948
oklch(55.6% 0.071 117.3)
-
Step 700
700 (this color)
#646C3F
oklch(51.3% 0.066 117)
-
Step 800
800
#4D532F
oklch(42.7% 0.055 116.5)
-
Step 900
900
#40452A
oklch(37.8% 0.043 117.1)
-
Step 950
950
#252819
oklch(26.9% 0.027 117.4)
#646C3F 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) | #72683C | 0.023 |
| Deuteranopia (no green cones) | #716841 | 0.024 |
| Tritanopia (no blue cones) | #686761 | 0.057 |
| Achromatopsia (no color) | #686868 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646C3F
#646C3F
oklch(51.3% 0.066 117)
- #6B5F89
#6B5F89
oklch(51.4% 0.067 297.1)
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 #646C3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.011
- Dark Olive Green #556B2F ΔE 0.032
- Muddy Green #657432 ΔE 0.033
- Brown Green #706C11 ΔE 0.042
- Browny Green #6F6C0A ΔE 0.044
- Camo Green #526525 ΔE 0.046
- Greeny Brown #696006 ΔE 0.049
- Military Green #667C3E ΔE 0.049
Use #646C3F 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.