#646D4B
Closest named color: Dark Moss Green (#606C38). oklch(51.8% 0.052 120.3), rgb(100, 109, 75).
Aa
White text reads best on this color (5.48:1).
About this color
#646D4B is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.052 and its hue 120°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.026 away. White text reads best on it, at 5.48:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.052) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.83:1 |
| White text | 5.48:1 |
Values
| HEX | #646D4B |
| RGB | rgb(100, 109, 75) |
| HSL | hsl(76, 18%, 36%) |
| OKLCH | oklch(51.8% 0.052 120.3) |
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 #646D4B | 5.48:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #646D4B | 3.83:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #646D4B text on white | 5.48:1 | AA | Lc 77.4 | Fine for body text |
| #646D4B 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
#E9EBE5
oklch(93.7% 0.008 121.6)
-
Step 200
200
#D8DBD1
oklch(88.6% 0.014 120.3)
-
Step 300
300
#BEC3B1
oklch(80.8% 0.025 119.6)
-
Step 400
400
#9DA589
oklch(70.8% 0.041 120.4)
-
Step 500
500
#858E6C
oklch(63% 0.05 119.9)
-
Step 600
600
#6F7853
oklch(55.5% 0.055 119.3)
-
Step 700
700 (this color)
#646D4B
oklch(51.8% 0.052 120.3)
-
Step 800
800
#4C5338
oklch(42.8% 0.043 120.1)
-
Step 900
900
#3F4430
oklch(37.6% 0.033 119.4)
-
Step 950
950
#25281C
oklch(27% 0.022 119.3)
#646D4B 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) | #716949 | 0.022 |
| Deuteranopia (no green cones) | #70694C | 0.022 |
| Tritanopia (no blue cones) | #676A64 | 0.042 |
| Achromatopsia (no color) | #696969 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646D4B
#646D4B
oklch(51.8% 0.052 120.3)
- #6D6282
#6D6282
oklch(51.9% 0.051 300.4)
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 #646D4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.026
- Muddy Green #657432 ΔE 0.043
- Dark Olive Green #556B2F ΔE 0.044
- Dark Taupe #7F684E ΔE 0.045
- Grey Brown #7F7053 ΔE 0.046
- Dirt Brown #836539 ΔE 0.051
- Dim Gray #696969 ΔE 0.052
- Military Green #667C3E ΔE 0.054
Use #646D4B 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.