#66563D
Closest named color: Milk Chocolate (#7F4E1E). oklch(46.2% 0.043 78.5), rgb(102, 86, 61).
Aa
White text reads best on this color (7.08:1).
About this color
#66563D is a medium-dark, muted brown. In OKLCH its lightness is 46%, its chroma 0.043 and its hue 78°. Its hue sits on the warm side of the wheel. The nearest named color is Milk Chocolate (#7F4E1E), ΔE 0.052 away. White text reads best on it, at 7.08:1.
| Hue family | Browns |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.043) |
| Temperature | warm |
| Nearest name | Milk Chocolate (#7F4E1E) |
| Black text | 2.96:1 |
| White text | 7.08:1 |
Values
| HEX | #66563D |
| RGB | rgb(102, 86, 61) |
| HSL | hsl(37, 25%, 32%) |
| OKLCH | oklch(46.2% 0.043 78.5) |
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 #66563D | 7.08:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #66563D | 2.96:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #66563D text on white | 7.08:1 | AAA | Lc 84.6 | Fine for body text |
| #66563D text on black | 2.96:1 | Fails | Lc -17.4 | 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
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#ECE9E5
oklch(93.5% 0.006 75.4)
-
Step 200
200
#DDD8D1
oklch(88.4% 0.011 76.6)
-
Step 300
300
#C8BFB2
oklch(80.8% 0.021 77.3)
-
Step 400
400
#AC9F8A
oklch(70.8% 0.033 79.8)
-
Step 500
500
#98876D
oklch(63.2% 0.042 78.3)
-
Step 600
600
#827054
oklch(55.5% 0.047 78.5)
-
Step 700
700 (this color)
#66563D
oklch(46.2% 0.043 78.5)
-
Step 800
800
#5A4D39
oklch(42.8% 0.036 78.3)
-
Step 900
900
#4A4031
oklch(37.7% 0.028 77.8)
-
Step 950
950
#2B261D
oklch(27.1% 0.018 82.2)
#66563D 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) | #5D563B | 0.016 |
| Deuteranopia (no green cones) | #615A3E | 0.014 |
| Tritanopia (no blue cones) | #6C514F | 0.037 |
| Achromatopsia (no color) | #585858 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66563D
#66563D
oklch(46.2% 0.043 78.5)
- #4A5A71
#4A5A71
oklch(46.3% 0.043 257.4)
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 #66563D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Milk Chocolate #7F4E1E ΔE 0.052
- Olive Brown #645403 ΔE 0.053
- Mud #735C12 ΔE 0.055
- Medium Brown #7F5112 ΔE 0.055
- Mud Brown #60460F ΔE 0.061
- Greeny Brown #696006 ΔE 0.066
- Cocoa #875F42 ΔE 0.066
- Green Brown #544E03 ΔE 0.069
Use #66563D 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.