#66583D
Closest named color: Mud (#735C12). oklch(46.7% 0.044 83.4), rgb(102, 88, 61).
Aa
White text reads best on this color (6.93:1).
About this color
#66583D is a medium-dark, muted brown. In OKLCH its lightness is 47%, its chroma 0.044 and its hue 83°. Its hue sits on the warm side of the wheel. The nearest named color is Mud (#735C12), ΔE 0.051 away. White text reads best on it, at 6.93:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.044) |
| Temperature | warm |
| Nearest name | Mud (#735C12) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #66583D |
| RGB | rgb(102, 88, 61) |
| HSL | hsl(40, 25%, 32%) |
| OKLCH | oklch(46.7% 0.044 83.4) |
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 #66583D | 6.93:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #66583D | 3.02:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #66583D text on white | 6.93:1 | AA | Lc 84.0 | Fine for body text |
| #66583D text on black | 3.02:1 | AA large text | Lc -18.0 | 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
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#ECE9E5
oklch(93.5% 0.006 75.4)
-
Step 200
200
#DDD9D0
oklch(88.6% 0.013 86.8)
-
Step 300
300
#C7C0B1
oklch(80.9% 0.022 86)
-
Step 400
400
#AB9F89
oklch(70.7% 0.034 82.7)
-
Step 500
500
#96886B
oklch(63.2% 0.045 85.2)
-
Step 600
600
#817153
oklch(55.6% 0.048 82.9)
-
Step 700
700 (this color)
#66583D
oklch(46.7% 0.044 83.4)
-
Step 800
800
#594D38
oklch(42.6% 0.036 81.4)
-
Step 900
900
#494030
oklch(37.6% 0.029 81.8)
-
Step 950
950
#2B261C
oklch(27.1% 0.019 84.5)
#66583D 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) | #5F583B | 0.013 |
| Deuteranopia (no green cones) | #625B3E | 0.010 |
| Tritanopia (no blue cones) | #6C5351 | 0.040 |
| Achromatopsia (no color) | #5A5A5A | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66583D
#66583D
oklch(46.7% 0.044 83.4)
- #4D5A73
#4D5A73
oklch(46.7% 0.044 263.3)
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 #66583D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud #735C12 ΔE 0.051
- Olive Brown #645403 ΔE 0.052
- Milk Chocolate #7F4E1E ΔE 0.052
- Medium Brown #7F5112 ΔE 0.055
- Greeny Brown #696006 ΔE 0.061
- Dark Moss Green #606C38 ΔE 0.064
- Cocoa #875F42 ΔE 0.064
- Mud Brown #60460F ΔE 0.064
Use #66583D 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.