#664D2D
Closest named color: Mud Brown (#60460F). oklch(43.9% 0.058 72.2), rgb(102, 77, 45).
Aa
White text reads best on this color (7.88:1).
About this color
#664D2D is a dark, muted brown. In OKLCH its lightness is 44%, its chroma 0.058 and its hue 72°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.035 away. White text reads best on it, at 7.88:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | muted (0.058) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #664D2D |
| RGB | rgb(102, 77, 45) |
| HSL | hsl(34, 39%, 29%) |
| OKLCH | oklch(43.9% 0.058 72.2) |
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 #664D2D | 7.88:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #664D2D | 2.66:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #664D2D text on white | 7.88:1 | AAA | Lc 87.3 | Fine for body text |
| #664D2D text on black | 2.66:1 | Fails | Lc -14.8 | 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
#F7F5F2
oklch(97.1% 0.005 78.3)
-
Step 100
100
#EEE9E3
oklch(93.6% 0.01 72.7)
-
Step 200
200
#E1D7CC
oklch(88.4% 0.019 70.2)
-
Step 300
300
#CFBEA9
oklch(81% 0.035 73.1)
-
Step 400
400
#B69C7C
oklch(70.8% 0.054 72.6)
-
Step 500
500
#A4835A
oklch(63.1% 0.07 72.1)
-
Step 600
600
#8F6C40
oklch(55.6% 0.075 71.6)
-
Step 700
700
#795A32
oklch(49.1% 0.069 72.1)
-
Step 800
800 (this color)
#664D2D
oklch(43.9% 0.058 72.2)
-
Step 900
900
#503E26
oklch(37.7% 0.045 73.7)
-
Step 950
950
#2F2417
oklch(26.9% 0.028 70.9)
#664D2D 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) | #564E2A | 0.029 |
| Deuteranopia (no green cones) | #5C542E | 0.026 |
| Tritanopia (no blue cones) | #6E4745 | 0.047 |
| Achromatopsia (no color) | #515151 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664D2D
#664D2D
oklch(43.9% 0.058 72.2)
- #3A5471
#3A5471
oklch(43.8% 0.058 251.8)
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 #664D2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.035
- Olive Brown #645403 ΔE 0.046
- Milk Chocolate #7F4E1E ΔE 0.048
- Medium Brown #7F5112 ΔE 0.053
- Green Brown #544E03 ΔE 0.053
- Mud #735C12 ΔE 0.061
- Purple Brown #673A3F ΔE 0.069
- Saddle Brown #8B4513 ΔE 0.070
Use #664D2D 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.