#645E33
Closest named color: Mud (#735C12). oklch(47.7% 0.062 101.4), rgb(100, 94, 51).
Aa
White text reads best on this color (6.58:1).
About this color
#645E33 is a medium-dark, muted brown. In OKLCH its lightness is 48%, its chroma 0.062 and its hue 101°. Its hue sits on the warm side of the wheel. The nearest named color is Mud (#735C12), ΔE 0.034 away. White text reads best on it, at 6.58:1.
| Hue family | Browns |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.062) |
| Temperature | warm |
| Nearest name | Mud (#735C12) |
| Black text | 3.19:1 |
| White text | 6.58:1 |
Values
| HEX | #645E33 |
| RGB | rgb(100, 94, 51) |
| HSL | hsl(53, 32%, 30%) |
| OKLCH | oklch(47.7% 0.062 101.4) |
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 #645E33 | 6.58:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #645E33 | 3.19:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #645E33 text on white | 6.58:1 | AA | Lc 82.6 | Fine for body text |
| #645E33 text on black | 3.19:1 | AA large text | Lc -19.4 | 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
#F6F5F2
oklch(97% 0.004 91.4)
-
Step 100
100
#EBEAE4
oklch(93.6% 0.008 98.9)
-
Step 200
200
#DBDACD
oklch(88.6% 0.018 103.2)
-
Step 300
300
#C4C2AC
oklch(81% 0.03 102.8)
-
Step 400
400
#A6A280
oklch(70.7% 0.047 101.9)
-
Step 500
500
#918B5F
oklch(63.1% 0.062 101.4)
-
Step 600
600
#7B7545
oklch(55.6% 0.068 102.1)
-
Step 700
700 (this color)
#645E33
oklch(47.7% 0.062 101.4)
-
Step 800
800
#55502E
oklch(42.7% 0.051 101)
-
Step 900
900
#464229
oklch(37.6% 0.04 100.2)
-
Step 950
950
#292718
oklch(27% 0.026 101.5)
#645E33 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) | #655C2F | 0.006 |
| Deuteranopia (no green cones) | #675E35 | 0.006 |
| Tritanopia (no blue cones) | #6A5954 | 0.056 |
| Achromatopsia (no color) | #5D5D5D | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645E33
#645E33
oklch(47.7% 0.062 101.4)
- #57597F
#57597F
oklch(47.8% 0.061 281.5)
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 #645E33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud #735C12 ΔE 0.034
- Greeny Brown #696006 ΔE 0.037
- Dark Moss Green #606C38 ΔE 0.041
- Olive Brown #645403 ΔE 0.041
- Camo Green #526525 ΔE 0.042
- Dark Olive Green #556B2F ΔE 0.046
- Mud Green #606602 ΔE 0.051
- Army Green #4B5D16 ΔE 0.053
Use #645E33 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.