#645B48
Closest named color: Dim Gray (#696969). oklch(47.4% 0.031 85.6), rgb(100, 91, 72).
Aa
White text reads best on this color (6.70:1).
About this color
#645B48 is a medium-dark, muted brown. In OKLCH its lightness is 47%, its chroma 0.031 and its hue 86°. Its hue sits on the warm side of the wheel. The nearest named color is Dim Gray (#696969), ΔE 0.056 away. White text reads best on it, at 6.70:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.031) |
| Temperature | warm |
| Nearest name | Dim Gray (#696969) |
| Black text | 3.13:1 |
| White text | 6.70:1 |
Values
| HEX | #645B48 |
| RGB | rgb(100, 91, 72) |
| HSL | hsl(41, 16%, 34%) |
| OKLCH | oklch(47.4% 0.031 85.6) |
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 #645B48 | 6.70:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #645B48 | 3.13:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #645B48 text on white | 6.70:1 | AA | Lc 83.1 | Fine for body text |
| #645B48 text on black | 3.13:1 | AA large text | Lc -18.8 | 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
#F6F5F4
oklch(97.1% 0.002 67.8)
-
Step 100
100
#EBEAE7
oklch(93.7% 0.004 91.4)
-
Step 200
200
#DBD9D3
oklch(88.5% 0.008 91.5)
-
Step 300
300
#C5C0B6
oklch(80.9% 0.015 84.6)
-
Step 400
400
#A7A090
oklch(70.7% 0.024 87.2)
-
Step 500
500
#928874
oklch(63% 0.031 84.6)
-
Step 600
600
#7C725D
oklch(55.5% 0.033 85.5)
-
Step 700
700 (this color)
#645B48
oklch(47.4% 0.031 85.6)
-
Step 800
800
#554E3F
oklch(42.6% 0.025 85.9)
-
Step 900
900
#464135
oklch(37.7% 0.021 88.1)
-
Step 950
950
#29261F
oklch(26.9% 0.013 87.6)
#645B48 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) | #605A47 | 0.008 |
| Deuteranopia (no green cones) | #625D49 | 0.006 |
| Tritanopia (no blue cones) | #695856 | 0.028 |
| Achromatopsia (no color) | #5C5C5C | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B48
#645B48
oklch(47.4% 0.031 85.6)
- #545C6E
#545C6E
oklch(47.5% 0.031 266.3)
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 #645B48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dim Gray #696969 ΔE 0.056
- Mud #735C12 ΔE 0.061
- Dark Taupe #7F684E ΔE 0.062
- Cocoa #875F42 ΔE 0.063
- Dark Moss Green #606C38 ΔE 0.063
- Milk Chocolate #7F4E1E ΔE 0.063
- Slate #516572 ΔE 0.065
- Olive Brown #645403 ΔE 0.066
Use #645B48 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.