#664D0E
Closest named color: Olive Brown (#645403). oklch(43.5% 0.083 85), rgb(102, 77, 14).
Aa
White text reads best on this color (7.97:1).
About this color
#664D0E is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.083 and its hue 85°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.023 away. White text reads best on it, at 7.97:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.083) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #664D0E |
| RGB | rgb(102, 77, 14) |
| HSL | hsl(43, 76%, 23%) |
| OKLCH | oklch(43.5% 0.083 85) |
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 #664D0E | 7.97:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #664D0E | 2.63:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #664D0E text on white | 7.97:1 | AAA | Lc 87.5 | Fine for body text |
| #664D0E text on black | 2.63:1 | Fails | Lc -14.6 | 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
#EEE9E0
oklch(93.5% 0.013 82.4)
-
Step 200
200
#E1D8C6
oklch(88.5% 0.026 84.6)
-
Step 300
300
#CFBF9E
oklch(80.9% 0.048 85.2)
-
Step 400
400
#B79D68
oklch(70.7% 0.077 84.4)
-
Step 500
500
#A5843C
oklch(63% 0.099 84.5)
-
Step 600
600
#906D14
oklch(55.5% 0.107 84.7)
-
Step 700
700
#7A5B02
oklch(49% 0.1 85.2)
-
Step 800
800 (this color)
#664D0E
oklch(43.5% 0.083 85)
-
Step 900
900
#513F13
oklch(37.8% 0.065 86.1)
-
Step 950
950
#30250D
oklch(27.1% 0.041 84.7)
#664D0E 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) | #584D02 | 0.028 |
| Deuteranopia (no green cones) | #5E5312 | 0.021 |
| Tritanopia (no blue cones) | #6F4541 | 0.073 |
| Achromatopsia (no color) | #515151 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664D0E
#664D0E
oklch(43.5% 0.083 85)
- #3B507F
#3B507F
oklch(43.7% 0.082 264.9)
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 #664D0E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.023
- Mud Brown #60460F ΔE 0.024
- Green Brown #544E03 ΔE 0.034
- Medium Brown #7F5112 ΔE 0.050
- Milk Chocolate #7F4E1E ΔE 0.051
- Mud #735C12 ΔE 0.051
- Greeny Brown #696006 ΔE 0.057
- Army Green #4B5D16 ΔE 0.061
Use #664D0E 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.