#664D07
Closest named color: Olive Brown (#645403). oklch(43.5% 0.086 86.1), rgb(102, 77, 7).
Aa
White text reads best on this color (7.98:1).
About this color
#664D07 is a dark, moderately saturated brown. In OKLCH its lightness is 43%, its chroma 0.086 and its hue 86°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.021 away. White text reads best on it, at 7.98:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.62:1 |
| White text | 7.98:1 |
Values
| HEX | #664D07 |
| RGB | rgb(102, 77, 7) |
| HSL | hsl(44, 87%, 21%) |
| OKLCH | oklch(43.5% 0.086 86.1) |
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 #664D07 | 7.98:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #664D07 | 2.62:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #664D07 text on white | 7.98:1 | AAA | Lc 87.5 | Fine for body text |
| #664D07 text on black | 2.62:1 | 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
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#EEE9DF
oklch(93.5% 0.014 84.6)
-
Step 200
200
#E1D8C5
oklch(88.4% 0.027 85.7)
-
Step 300
300
#CFBF9C
oklch(80.9% 0.05 86.3)
-
Step 400
400
#B79D65
oklch(70.6% 0.08 85.5)
-
Step 500
500
#A58538
oklch(63.2% 0.103 86.3)
-
Step 600
600
#906E08
oklch(55.7% 0.112 86.6)
-
Step 700
700
#7A5C00
oklch(49.2% 0.101 86.4)
-
Step 800
800 (this color)
#664D07
oklch(43.5% 0.086 86.1)
-
Step 900
900
#513F10
oklch(37.7% 0.067 87.1)
-
Step 950
950
#30250C
oklch(27.1% 0.042 85.5)
#664D07 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) | #584D00 | 0.027 |
| Deuteranopia (no green cones) | #5E530C | 0.021 |
| Tritanopia (no blue cones) | #704541 | 0.077 |
| Achromatopsia (no color) | #515151 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664D07
#664D07
oklch(43.5% 0.086 86.1)
- #3B4F80
#3B4F80
oklch(43.5% 0.085 266.1)
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 #664D07, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.021
- Mud Brown #60460F ΔE 0.025
- Green Brown #544E03 ΔE 0.033
- Medium Brown #7F5112 ΔE 0.050
- Mud #735C12 ΔE 0.050
- Milk Chocolate #7F4E1E ΔE 0.052
- Greeny Brown #696006 ΔE 0.056
- Army Green #4B5D16 ΔE 0.060
Use #664D07 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.