#646C33
Closest named color: Dark Moss Green (#606C38). oklch(51.1% 0.081 115.9), rgb(100, 108, 51).
Aa
White text reads best on this color (5.62:1).
About this color
#646C33 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 51%, its chroma 0.081 and its hue 116°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.007 away. White text reads best on it, at 5.62:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.081) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #646C33 |
| RGB | rgb(100, 108, 51) |
| HSL | hsl(68, 36%, 31%) |
| OKLCH | oklch(51.1% 0.081 115.9) |
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 #646C33 | 5.62:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #646C33 | 3.73:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #646C33 text on white | 5.62:1 | AA | Lc 78.1 | Fine for body text |
| #646C33 text on black | 3.73:1 | AA large text | Lc -23.7 | 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
#F5F6F2
oklch(97.1% 0.005 117.9)
-
Step 100
100
#E9EBE2
oklch(93.6% 0.012 116.8)
-
Step 200
200
#D8DBCB
oklch(88.5% 0.022 115.5)
-
Step 300
300
#BFC4A8
oklch(80.9% 0.039 115.5)
-
Step 400
400
#9EA679
oklch(70.7% 0.063 116.2)
-
Step 500
500
#879057
oklch(63.2% 0.08 116.1)
-
Step 600
600
#717A3B
oklch(55.7% 0.087 116)
-
Step 700
700 (this color)
#646C33
oklch(51.1% 0.081 115.9)
-
Step 800
800
#4D5326
oklch(42.6% 0.067 115.6)
-
Step 900
900
#404524
oklch(37.7% 0.052 116)
-
Step 950
950
#262815
oklch(26.9% 0.033 113.5)
#646C33 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) | #73672E | 0.025 |
| Deuteranopia (no green cones) | #726836 | 0.026 |
| Tritanopia (no blue cones) | #69675F | 0.069 |
| Achromatopsia (no color) | #676767 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646C33
#646C33
oklch(51.1% 0.081 115.9)
- #6A5C8F
#6A5C8F
oklch(50.9% 0.081 296)
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 #646C33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.007
- Dark Olive Green #556B2F ΔE 0.023
- Muddy Green #657432 ΔE 0.025
- Brown Green #706C11 ΔE 0.030
- Browny Green #6F6C0A ΔE 0.031
- Mud Green #606602 ΔE 0.036
- Camo Green #526525 ΔE 0.038
- Greeny Brown #696006 ΔE 0.039
Use #646C33 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.