#664F0D
Closest named color: Olive Brown (#645403). oklch(44% 0.084 87.6), rgb(102, 79, 13).
Aa
White text reads best on this color (7.80:1).
About this color
#664F0D is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.084 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 7.80:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.084) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.68:1 |
| White text | 7.80:1 |
Values
| HEX | #664F0D |
| RGB | rgb(102, 79, 13) |
| HSL | hsl(44, 77%, 23%) |
| OKLCH | oklch(44% 0.084 87.6) |
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 #664F0D | 7.80:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #664F0D | 2.68:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #664F0D text on white | 7.80:1 | AAA | Lc 87.0 | Fine for body text |
| #664F0D text on black | 2.68:1 | Fails | Lc -15.1 | Dividers and decoration only |
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
#EEE9DF
oklch(93.5% 0.014 84.6)
-
Step 200
200
#E1D8C5
oklch(88.4% 0.027 85.7)
-
Step 300
300
#CEBF9D
oklch(80.8% 0.049 87)
-
Step 400
400
#B59E66
oklch(70.7% 0.079 88)
-
Step 500
500
#A3853A
oklch(63% 0.1 87.3)
-
Step 600
600
#8E6E0F
oklch(55.5% 0.109 87.4)
-
Step 700
700
#795C00
oklch(49.1% 0.1 87.1)
-
Step 800
800 (this color)
#664F0D
oklch(44% 0.084 87.6)
-
Step 900
900
#503F12
oklch(37.6% 0.065 87.7)
-
Step 950
950
#2F250C
oklch(27% 0.042 87.5)
#664F0D 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) | #5A4E00 | 0.024 |
| Deuteranopia (no green cones) | #5F5511 | 0.020 |
| Tritanopia (no blue cones) | #6F4743 | 0.076 |
| Achromatopsia (no color) | #525252 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664F0D
#664F0D
oklch(44% 0.084 87.6)
- #3E5081
#3E5081
oklch(44% 0.084 267.6)
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 #664F0D, 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 0.030
- Green Brown #544E03 ΔE 0.034
- Mud #735C12 ΔE 0.046
- Medium Brown #7F5112 ΔE 0.048
- Milk Chocolate #7F4E1E ΔE 0.051
- Greeny Brown #696006 ΔE 0.051
- Army Green #4B5D16 ΔE 0.057
Use #664F0D 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.