#646B45
Closest named color: Dark Moss Green (#606C38). oklch(51.2% 0.057 117), rgb(100, 107, 69).
Aa
White text reads best on this color (5.62:1).
About this color
#646B45 is a medium-dark, muted yellow. In OKLCH its lightness is 51%, its chroma 0.057 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 0.020 away. White text reads best on it, at 5.62:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.057) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #646B45 |
| RGB | rgb(100, 107, 69) |
| HSL | hsl(71, 22%, 35%) |
| OKLCH | oklch(51.2% 0.057 117) |
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 #646B45 | 5.62:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #646B45 | 3.73:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #646B45 text on white | 5.62:1 | AA | Lc 78.1 | Fine for body text |
| #646B45 text on black | 3.73:1 | AA large text | Lc -23.6 | 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
#D8DBCF
oklch(88.6% 0.016 118.2)
-
Step 300
300
#BFC3AF
oklch(80.9% 0.028 116.2)
-
Step 400
400
#9EA586
oklch(70.8% 0.044 117.9)
-
Step 500
500
#878E67
oklch(63.1% 0.056 116.3)
-
Step 600
600
#71784F
oklch(55.6% 0.06 116.3)
-
Step 700
700 (this color)
#646B45
oklch(51.2% 0.057 117)
-
Step 800
800
#4D5334
oklch(42.8% 0.049 117.4)
-
Step 900
900
#40442E
oklch(37.6% 0.036 116.5)
-
Step 950
950
#25281B
oklch(26.9% 0.023 118.6)
#646B45 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) | #706742 | 0.020 |
| Deuteranopia (no green cones) | #6F6847 | 0.020 |
| Tritanopia (no blue cones) | #686761 | 0.048 |
| Achromatopsia (no color) | #676767 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646B45
#646B45
oklch(51.2% 0.057 117)
- #6A6084
#6A6084
oklch(51.2% 0.057 297.1)
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 #646B45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.020
- Dark Olive Green #556B2F ΔE 0.038
- Muddy Green #657432 ΔE 0.041
- Dark Taupe #7F684E ΔE 0.048
- Dirt Brown #836539 ΔE 0.050
- Brown Green #706C11 ΔE 0.051
- Camo Green #526525 ΔE 0.051
- Grey Brown #7F7053 ΔE 0.051
Use #646B45 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.