#66451C
Closest named color: Mud Brown (#60460F). oklch(41.9% 0.072 69.3), rgb(102, 69, 28).
Aa
White text reads best on this color (8.63:1).
About this color
#66451C is a dark, moderately saturated brown. In OKLCH its lightness is 42%, its chroma 0.072 and its hue 69°. 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 8.63:1.
| Hue family | Browns |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.072) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #66451C |
| RGB | rgb(102, 69, 28) |
| HSL | hsl(33, 57%, 25%) |
| OKLCH | oklch(41.9% 0.072 69.3) |
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 #66451C | 8.63:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #66451C | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #66451C text on white | 8.63:1 | AAA | Lc 89.5 | Fine for body text |
| #66451C text on black | 2.43:1 | Fails | Lc -12.8 | 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
#E4D7C9
oklch(88.6% 0.024 69.6)
-
Step 300
300
#D3BCA4
oklch(80.8% 0.042 68.4)
-
Step 400
400
#BC9973
oklch(70.6% 0.067 68.7)
-
Step 500
500
#AB804D
oklch(63.1% 0.086 69.9)
-
Step 600
600
#976930
oklch(55.7% 0.094 69.5)
-
Step 700
700
#805722
oklch(49.1% 0.087 69.9)
-
Step 800
800 (this color)
#66451C
oklch(41.9% 0.072 69.3)
-
Step 900
900
#553C1E
oklch(37.7% 0.057 69.7)
-
Step 950
950
#322312
oklch(27% 0.036 68.7)
#66451C 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) | #504717 | 0.042 |
| Deuteranopia (no green cones) | #584F1D | 0.037 |
| Tritanopia (no blue cones) | #6F3D3C | 0.058 |
| Achromatopsia (no color) | #4C4C4C | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66451C
#66451C
oklch(41.9% 0.072 69.3)
- #2B4F72
#2B4F72
oklch(41.7% 0.072 249.3)
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 #66451C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.018
- Green Brown #544E03 ΔE 0.050
- Olive Brown #645403 ΔE 0.051
- Milk Chocolate #7F4E1E ΔE 0.056
- Medium Brown #7F5112 ΔE 0.062
- Purple Brown #673A3F ΔE 0.066
- Chestnut #742802 ΔE 0.070
- Saddle Brown #8B4513 ΔE 0.072
Use #66451C 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.