#646A40
Closest named color: Dark Moss Green (#606C38). oklch(50.8% 0.062 115.3), rgb(100, 106, 64).
Aa
White text reads best on this color (5.71:1).
About this color
#646A40 is a medium-dark, muted yellow. In OKLCH its lightness is 51%, its chroma 0.062 and its hue 115°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.015 away. White text reads best on it, at 5.71:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.062) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.67:1 |
| White text | 5.71:1 |
Values
| HEX | #646A40 |
| RGB | rgb(100, 106, 64) |
| HSL | hsl(69, 25%, 33%) |
| OKLCH | oklch(50.8% 0.062 115.3) |
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 #646A40 | 5.71:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #646A40 | 3.67:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #646A40 text on white | 5.71:1 | AA | Lc 78.6 | Fine for body text |
| #646A40 text on black | 3.67:1 | AA large text | Lc -23.2 | 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
#BFC3AE
oklch(80.8% 0.029 115.8)
-
Step 400
400
#9FA583
oklch(70.8% 0.048 115.8)
-
Step 500
500
#888E63
oklch(63.1% 0.061 114.6)
-
Step 600
600
#72784A
oklch(55.6% 0.066 114.7)
-
Step 700
700 (this color)
#646A40
oklch(50.8% 0.062 115.3)
-
Step 800
800
#4E5231
oklch(42.6% 0.051 114.2)
-
Step 900
900
#41442B
oklch(37.7% 0.04 113.9)
-
Step 950
950
#26281A
oklch(27% 0.025 114.7)
#646A40 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) | #70663D | 0.020 |
| Deuteranopia (no green cones) | #6F6742 | 0.020 |
| Tritanopia (no blue cones) | #686660 | 0.053 |
| Achromatopsia (no color) | #666666 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646A40
#646A40
oklch(50.8% 0.062 115.3)
- #685F86
#685F86
oklch(50.9% 0.062 294.7)
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 #646A40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.015
- Dark Olive Green #556B2F ΔE 0.034
- Muddy Green #657432 ΔE 0.039
- Camo Green #526525 ΔE 0.045
- Brown Green #706C11 ΔE 0.046
- Greeny Brown #696006 ΔE 0.048
- Browny Green #6F6C0A ΔE 0.048
- Dirt Brown #836539 ΔE 0.050
Use #646A40 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.