#664003
Closest named color: Mud Brown (#60460F). oklch(40.6% 0.086 70.9), rgb(102, 64, 3).
Aa
White text reads best on this color (9.13:1).
About this color
#664003 is a dark, moderately saturated brown. In OKLCH its lightness is 41%, its chroma 0.086 and its hue 71°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.018 away. White text reads best on it, at 9.13:1.
| Hue family | Browns |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #664003 |
| RGB | rgb(102, 64, 3) |
| HSL | hsl(37, 94%, 21%) |
| OKLCH | oklch(40.6% 0.086 70.9) |
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 #664003 | 9.13:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #664003 | 2.29:1 | Fails | Lc 13.2 | Not readable |
| #664003 text on white | 9.13:1 | AAA | Lc 90.7 | Preferred for body text |
| #664003 text on black | 2.29:1 | Fails | Lc -11.6 | 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
#F8F5F1
oklch(97.1% 0.006 75.4)
-
Step 100
100
#F0E8E0
oklch(93.5% 0.014 67.7)
-
Step 200
200
#E5D6C6
oklch(88.4% 0.027 69.3)
-
Step 300
300
#D6BC9E
oklch(81% 0.05 71)
-
Step 400
400
#C19868
oklch(70.7% 0.081 70.3)
-
Step 500
500
#B07E3D
oklch(63% 0.103 71.1)
-
Step 600
600
#9C6617
oklch(55.6% 0.112 70.3)
-
Step 700
700
#855505
oklch(49.1% 0.104 71.1)
-
Step 800
800 (this color)
#664003
oklch(40.6% 0.086 70.9)
-
Step 900
900
#583B14
oklch(37.8% 0.067 70.9)
-
Step 950
950
#33230D
oklch(27% 0.042 73)
#664003 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) | #4D4300 | 0.048 |
| Deuteranopia (no green cones) | #564C05 | 0.044 |
| Tritanopia (no blue cones) | #703636 | 0.071 |
| Achromatopsia (no color) | #484848 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664003
#664003
oklch(40.6% 0.086 70.9)
- #214B76
#214B76
oklch(40.5% 0.086 251.3)
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 #664003, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.018
- Green Brown #544E03 ΔE 0.051
- Olive Brown #645403 ΔE 0.057
- Chestnut #742802 ΔE 0.062
- Milk Chocolate #7F4E1E ΔE 0.066
- Medium Brown #7F5112 ΔE 0.070
- Purple Brown #673A3F ΔE 0.075
- Saddle Brown #8B4513 ΔE 0.078
Use #664003 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.