#646D4D
Closest named color: Dark Moss Green (#606C38). oklch(51.8% 0.049 120.9), rgb(100, 109, 77).
Aa
White text reads best on this color (5.47:1).
About this color
#646D4D is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.049 and its hue 121°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.029 away. White text reads best on it, at 5.47:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.049) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.83:1 |
| White text | 5.47:1 |
Values
| HEX | #646D4D |
| RGB | rgb(100, 109, 77) |
| HSL | hsl(77, 17%, 36%) |
| OKLCH | oklch(51.8% 0.049 120.9) |
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 #646D4D | 5.47:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #646D4D | 3.83:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #646D4D text on white | 5.47:1 | AA | Lc 77.3 | Fine for body text |
| #646D4D text on black | 3.83:1 | AA large text | Lc -24.4 | 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
#E9EBE6
oklch(93.7% 0.007 124.5)
-
Step 200
200
#D8DBD1
oklch(88.6% 0.014 120.3)
-
Step 300
300
#BEC3B2
oklch(80.8% 0.024 120.3)
-
Step 400
400
#9DA58A
oklch(70.8% 0.039 120.8)
-
Step 500
500
#858E6D
oklch(63% 0.049 120.2)
-
Step 600
600
#6F7855
oklch(55.6% 0.053 119.9)
-
Step 700
700 (this color)
#646D4D
oklch(51.8% 0.049 120.9)
-
Step 800
800
#4B5339
oklch(42.8% 0.042 122.1)
-
Step 900
900
#3F4431
oklch(37.6% 0.032 119.9)
-
Step 950
950
#25281D
oklch(27% 0.02 120.1)
#646D4D 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) | #71694B | 0.022 |
| Deuteranopia (no green cones) | #70694E | 0.022 |
| Tritanopia (no blue cones) | #676A65 | 0.041 |
| Achromatopsia (no color) | #696969 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646D4D
#646D4D
oklch(51.8% 0.049 120.9)
- #6D6281
#6D6281
oklch(51.8% 0.05 300.9)
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 #646D4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.029
- Dark Taupe #7F684E ΔE 0.044
- Grey Brown #7F7053 ΔE 0.045
- Muddy Green #657432 ΔE 0.045
- Dark Olive Green #556B2F ΔE 0.047
- Dim Gray #696969 ΔE 0.049
- Dirt Brown #836539 ΔE 0.052
- Military Green #667C3E ΔE 0.055
Use #646D4D 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.