#645D2B
Closest named color: Mud (#735C12). oklch(47.3% 0.07 101.4), rgb(100, 93, 43).
Aa
White text reads best on this color (6.68:1).
About this color
#645D2B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.070 and its hue 101°. Its hue sits on the warm side of the wheel. The nearest named color is Mud (#735C12), ΔE 0.029 away. White text reads best on it, at 6.68:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.070) |
| Temperature | warm |
| Nearest name | Mud (#735C12) |
| Black text | 3.14:1 |
| White text | 6.68:1 |
Values
| HEX | #645D2B |
| RGB | rgb(100, 93, 43) |
| HSL | hsl(53, 40%, 28%) |
| OKLCH | oklch(47.3% 0.07 101.4) |
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 #645D2B | 6.68:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #645D2B | 3.14:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #645D2B text on white | 6.68:1 | AA | Lc 83.0 | Fine for body text |
| #645D2B text on black | 3.14:1 | AA large text | Lc -19.0 | 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
#F6F6F2
oklch(97.2% 0.005 106.5)
-
Step 100
100
#EBEAE3
oklch(93.6% 0.009 100)
-
Step 200
200
#DBDACC
oklch(88.5% 0.019 103.5)
-
Step 300
300
#C5C2A9
oklch(81% 0.034 101.5)
-
Step 400
400
#A7A27B
oklch(70.6% 0.054 101.5)
-
Step 500
500
#928B59
oklch(63.1% 0.069 101.3)
-
Step 600
600
#7C753E
oklch(55.6% 0.076 102.1)
-
Step 700
700 (this color)
#645D2B
oklch(47.3% 0.07 101.4)
-
Step 800
800
#565029
oklch(42.7% 0.058 100.7)
-
Step 900
900
#464225
oklch(37.5% 0.045 101.5)
-
Step 950
950
#292716
oklch(27% 0.029 102.4)
#645D2B 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) | #655A26 | 0.009 |
| Deuteranopia (no green cones) | #675D2D | 0.006 |
| Tritanopia (no blue cones) | #6B5752 | 0.065 |
| Achromatopsia (no color) | #5C5C5C | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645D2B
#645D2B
oklch(47.3% 0.07 101.4)
- #555783
#555783
oklch(47.4% 0.071 281.3)
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 #645D2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud #735C12 ΔE 0.029
- Greeny Brown #696006 ΔE 0.030
- Olive Brown #645403 ΔE 0.033
- Camo Green #526525 ΔE 0.038
- Dark Moss Green #606C38 ΔE 0.042
- Dark Olive Green #556B2F ΔE 0.045
- Mud Green #606602 ΔE 0.045
- Army Green #4B5D16 ΔE 0.048
Use #645D2B 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.