#645E41
Closest named color: Dark Moss Green (#606C38). oklch(48% 0.044 97.9), rgb(100, 94, 65).
Aa
White text reads best on this color (6.52:1).
About this color
#645E41 is a medium-dark, muted brown. In OKLCH its lightness is 48%, its chroma 0.044 and its hue 98°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.048 away. White text reads best on it, at 6.52:1.
| Hue family | Browns |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.044) |
| Temperature | warm |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.21:1 |
| White text | 6.52:1 |
Values
| HEX | #645E41 |
| RGB | rgb(100, 94, 65) |
| HSL | hsl(50, 21%, 32%) |
| OKLCH | oklch(48% 0.044 97.9) |
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 #645E41 | 6.52:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #645E41 | 3.21:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #645E41 text on white | 6.52:1 | AA | Lc 82.3 | Fine for body text |
| #645E41 text on black | 3.21:1 | AA large text | Lc -19.6 | 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
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#EBEAE5
oklch(93.6% 0.007 97.4)
-
Step 200
200
#DBD9D1
oklch(88.5% 0.011 95.2)
-
Step 300
300
#C4C1B2
oklch(80.9% 0.021 97.6)
-
Step 400
400
#A6A189
oklch(70.7% 0.034 97.5)
-
Step 500
500
#908A6C
oklch(63.1% 0.043 98)
-
Step 600
600
#7B7454
oklch(55.7% 0.047 97.3)
-
Step 700
700 (this color)
#645E41
oklch(48% 0.044 97.9)
-
Step 800
800
#544F38
oklch(42.6% 0.036 97.3)
-
Step 900
900
#454231
oklch(37.7% 0.028 99.2)
-
Step 950
950
#29271D
oklch(27.2% 0.018 98)
#645E41 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) | #645C3F | 0.006 |
| Deuteranopia (no green cones) | #655F42 | 0.004 |
| Tritanopia (no blue cones) | #695A56 | 0.039 |
| Achromatopsia (no color) | #5E5E5E | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645E41
#645E41
oklch(48% 0.044 97.9)
- #575B77
#575B77
oklch(47.9% 0.045 278.2)
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 #645E41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.048
- Mud #735C12 ΔE 0.049
- Greeny Brown #696006 ΔE 0.055
- Camo Green #526525 ΔE 0.056
- Olive Brown #645403 ΔE 0.056
- Dark Olive Green #556B2F ΔE 0.057
- Dark Taupe #7F684E ΔE 0.058
- Dirt Brown #836539 ΔE 0.059
Use #645E41 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.