#646645
Closest named color: Dark Moss Green (#606C38). oklch(50% 0.049 111), rgb(100, 102, 69).
Aa
White text reads best on this color (5.95:1).
About this color
#646645 is a medium-dark, muted brown. In OKLCH its lightness is 50%, its chroma 0.049 and its hue 111°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.030 away. White text reads best on it, at 5.95:1.
| Hue family | Browns |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.049) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #646645 |
| RGB | rgb(100, 102, 69) |
| HSL | hsl(64, 19%, 34%) |
| OKLCH | oklch(50% 0.049 111) |
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 #646645 | 5.95:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #646645 | 3.52:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #646645 text on white | 5.95:1 | AA | Lc 79.8 | Fine for body text |
| #646645 text on black | 3.52:1 | AA large text | Lc -22.1 | 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
#EAEAE5
oklch(93.6% 0.007 106.5)
-
Step 200
200
#D9DAD0
oklch(88.5% 0.014 111.3)
-
Step 300
300
#C1C2B1
oklch(80.9% 0.023 109.6)
-
Step 400
400
#A1A388
oklch(70.6% 0.038 110.8)
-
Step 500
500
#8A8D6B
oklch(63.2% 0.049 111.9)
-
Step 600
600
#747752
oklch(55.7% 0.054 111.9)
-
Step 700
700 (this color)
#646645
oklch(50% 0.049 111)
-
Step 800
800
#505137
oklch(42.7% 0.04 109.8)
-
Step 900
900
#424330
oklch(37.6% 0.031 110.3)
-
Step 950
950
#27271C
oklch(26.9% 0.019 107.6)
#646645 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) | #6B6343 | 0.013 |
| Deuteranopia (no green cones) | #6B6446 | 0.013 |
| Tritanopia (no blue cones) | #68625D | 0.043 |
| Achromatopsia (no color) | #646464 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646645
#646645
oklch(50% 0.049 111)
- #635E7E
#635E7E
oklch(49.9% 0.051 291.6)
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 #646645, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.030
- Dark Olive Green #556B2F ΔE 0.044
- Dark Taupe #7F684E ΔE 0.048
- Dirt Brown #836539 ΔE 0.051
- Camo Green #526525 ΔE 0.051
- Mud #735C12 ΔE 0.051
- Greeny Brown #696006 ΔE 0.054
- Dim Gray #696969 ΔE 0.054
Use #646645 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.