#664E01
Closest named color: Olive Brown (#645403). oklch(43.7% 0.089 88), rgb(102, 78, 1).
Aa
White text reads best on this color (7.90:1).
About this color
#664E01 is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.089 and its hue 88°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.017 away. White text reads best on it, at 7.90:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.089) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #664E01 |
| RGB | rgb(102, 78, 1) |
| HSL | hsl(46, 98%, 20%) |
| OKLCH | oklch(43.7% 0.089 88) |
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 #664E01 | 7.90:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #664E01 | 2.65:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #664E01 text on white | 7.90:1 | AAA | Lc 87.2 | Fine for body text |
| #664E01 text on black | 2.65:1 | Fails | Lc -14.9 | 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
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#EEE9DF
oklch(93.5% 0.014 84.6)
-
Step 200
200
#E1D8C4
oklch(88.4% 0.029 86.6)
-
Step 300
300
#CFBF9B
oklch(80.9% 0.052 86.9)
-
Step 400
400
#B69E63
oklch(70.7% 0.083 88.1)
-
Step 500
500
#A48533
oklch(63% 0.106 88)
-
Step 600
600
#8F6E00
oklch(55.5% 0.114 87.7)
-
Step 700
700
#785C00
oklch(49% 0.1 87.9)
-
Step 800
800 (this color)
#664E01
oklch(43.7% 0.089 88)
-
Step 900
900
#513F0D
oklch(37.7% 0.069 87.9)
-
Step 950
950
#2F250A
oklch(26.9% 0.044 88.7)
#664E01 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) | #594D00 | 0.024 |
| Deuteranopia (no green cones) | #5F5407 | 0.020 |
| Tritanopia (no blue cones) | #704641 | 0.079 |
| Achromatopsia (no color) | #515151 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664E01
#664E01
oklch(43.7% 0.089 88)
- #3D4F83
#3D4F83
oklch(43.8% 0.089 268.2)
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 #664E01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.017
- Mud Brown #60460F ΔE 0.029
- Green Brown #544E03 ΔE 0.032
- Mud #735C12 ΔE 0.048
- Medium Brown #7F5112 ΔE 0.050
- Greeny Brown #696006 ΔE 0.053
- Milk Chocolate #7F4E1E ΔE 0.053
- Army Green #4B5D16 ΔE 0.057
Use #664E01 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.