#66491C
Closest named color: Mud Brown (#60460F). oklch(42.8% 0.072 75.4), rgb(102, 73, 28).
Aa
White text reads best on this color (8.28:1).
About this color
#66491C is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.072 and its hue 75°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.018 away. White text reads best on it, at 8.28:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.072) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.53:1 |
| White text | 8.28:1 |
Values
| HEX | #66491C |
| RGB | rgb(102, 73, 28) |
| HSL | hsl(36, 57%, 25%) |
| OKLCH | oklch(42.8% 0.072 75.4) |
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 #66491C | 8.28:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #66491C | 2.53:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #66491C text on white | 8.28:1 | AAA | Lc 88.5 | Fine for body text |
| #66491C text on black | 2.53:1 | Fails | Lc -13.7 | Not readable |
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 800.
-
Step 50
50
#F8F5F1
oklch(97.1% 0.006 75.4)
-
Step 100
100
#EFE9E1
oklch(93.7% 0.013 75.4)
-
Step 200
200
#E2D7C8
oklch(88.4% 0.024 75.8)
-
Step 300
300
#D1BDA3
oklch(80.8% 0.042 74.4)
-
Step 400
400
#B99B71
oklch(70.6% 0.067 75.6)
-
Step 500
500
#A8824B
oklch(63.1% 0.086 75.3)
-
Step 600
600
#936B2C
oklch(55.6% 0.094 75.8)
-
Step 700
700
#7D591F
oklch(49.1% 0.087 75.7)
-
Step 800
800 (this color)
#66491C
oklch(42.8% 0.072 75.4)
-
Step 900
900
#533D1D
oklch(37.7% 0.056 74.9)
-
Step 950
950
#312412
oklch(27.1% 0.036 74.3)
#66491C 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) | #544A17 | 0.034 |
| Deuteranopia (no green cones) | #5B511D | 0.029 |
| Tritanopia (no blue cones) | #6F413F | 0.061 |
| Achromatopsia (no color) | #4E4E4E | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66491C
#66491C
oklch(42.8% 0.072 75.4)
- #335076
#335076
oklch(42.6% 0.073 255.6)
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 #66491C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.018
- Olive Brown #645403 ΔE 0.040
- Green Brown #544E03 ΔE 0.043
- Milk Chocolate #7F4E1E ΔE 0.051
- Medium Brown #7F5112 ΔE 0.055
- Mud #735C12 ΔE 0.064
- Saddle Brown #8B4513 ΔE 0.070
- Greeny Brown #696006 ΔE 0.073
Use #66491C 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.