#664D1F
Closest named color: Mud Brown (#60460F). oklch(43.7% 0.071 80.2), rgb(102, 77, 31).
Aa
White text reads best on this color (7.93:1).
About this color
#664D1F is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.071 and its hue 80°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.025 away. White text reads best on it, at 7.93:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.071) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.64:1 |
| White text | 7.93:1 |
Values
| HEX | #664D1F |
| RGB | rgb(102, 77, 31) |
| HSL | hsl(39, 53%, 26%) |
| OKLCH | oklch(43.7% 0.071 80.2) |
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 #664D1F | 7.93:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #664D1F | 2.64:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #664D1F text on white | 7.93:1 | AAA | Lc 87.4 | Fine for body text |
| #664D1F text on black | 2.64:1 | Fails | Lc -14.7 | 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
#F7F5F1
oklch(97.1% 0.006 84.6)
-
Step 100
100
#EEE9E1
oklch(93.6% 0.012 79.8)
-
Step 200
200
#E1D8C9
oklch(88.5% 0.023 80.7)
-
Step 300
300
#CFBEA3
oklch(80.9% 0.041 79.4)
-
Step 400
400
#B69D71
oklch(70.8% 0.067 81.4)
-
Step 500
500
#A4844B
oklch(63.1% 0.085 80.7)
-
Step 600
600
#8F6D2D
oklch(55.6% 0.092 80.6)
-
Step 700
700
#7A5B1F
oklch(49.2% 0.086 80.5)
-
Step 800
800 (this color)
#664D1F
oklch(43.7% 0.071 80.2)
-
Step 900
900
#513E1D
oklch(37.7% 0.055 79.6)
-
Step 950
950
#2F2512
oklch(27.1% 0.035 82.4)
#664D1F 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) | #574D1A | 0.028 |
| Deuteranopia (no green cones) | #5D5421 | 0.024 |
| Tritanopia (no blue cones) | #6F4643 | 0.061 |
| Achromatopsia (no color) | #515151 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664D1F
#664D1F
oklch(43.7% 0.071 80.2)
- #3A5279
#3A5279
oklch(43.7% 0.071 259.8)
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 #664D1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.025
- Olive Brown #645403 ΔE 0.032
- Green Brown #544E03 ΔE 0.042
- Milk Chocolate #7F4E1E ΔE 0.047
- Medium Brown #7F5112 ΔE 0.049
- Mud #735C12 ΔE 0.054
- Greeny Brown #696006 ΔE 0.063
- Army Green #4B5D16 ΔE 0.067
Use #664D1F 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.