#645D3D
Closest named color: Mud (#735C12). oklch(47.6% 0.048 97.3), rgb(100, 93, 61).
Aa
White text reads best on this color (6.61:1).
About this color
#645D3D is a medium-dark, muted brown. In OKLCH its lightness is 48%, its chroma 0.048 and its hue 97°. Its hue sits on the warm side of the wheel. The nearest named color is Mud (#735C12), ΔE 0.045 away. White text reads best on it, at 6.61:1.
| Hue family | Browns |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.048) |
| Temperature | warm |
| Nearest name | Mud (#735C12) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #645D3D |
| RGB | rgb(100, 93, 61) |
| HSL | hsl(49, 24%, 32%) |
| OKLCH | oklch(47.6% 0.048 97.3) |
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 #645D3D | 6.61:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #645D3D | 3.17:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #645D3D text on white | 6.61:1 | AA | Lc 82.7 | Fine for body text |
| #645D3D text on black | 3.17:1 | AA large text | Lc -19.2 | 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
#DBD9D0
oklch(88.4% 0.012 96.4)
-
Step 300
300
#C4C1B0
oklch(80.9% 0.024 98.7)
-
Step 400
400
#A7A187
oklch(70.7% 0.037 96.5)
-
Step 500
500
#918A69
oklch(63.1% 0.048 97.5)
-
Step 600
600
#7C7450
oklch(55.7% 0.053 97.1)
-
Step 700
700 (this color)
#645D3D
oklch(47.6% 0.048 97.3)
-
Step 800
800
#554F36
oklch(42.6% 0.039 96.3)
-
Step 900
900
#46422F
oklch(37.7% 0.031 97.6)
-
Step 950
950
#29271C
oklch(27.1% 0.02 98.9)
#645D3D 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) | #635B3B | 0.006 |
| Deuteranopia (no green cones) | #655E3E | 0.004 |
| Tritanopia (no blue cones) | #6A5955 | 0.044 |
| Achromatopsia (no color) | #5D5D5D | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645D3D
#645D3D
oklch(47.6% 0.048 97.3)
- #565A78
#565A78
oklch(47.6% 0.049 278.5)
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 #645D3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud #735C12 ΔE 0.045
- Dark Moss Green #606C38 ΔE 0.048
- Olive Brown #645403 ΔE 0.051
- Greeny Brown #696006 ΔE 0.052
- Camo Green #526525 ΔE 0.053
- Dark Olive Green #556B2F ΔE 0.056
- Medium Brown #7F5112 ΔE 0.058
- Milk Chocolate #7F4E1E ΔE 0.059
Use #645D3D 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.