#664403
Closest named color: Mud Brown (#60460F). oklch(41.5% 0.086 75.8), rgb(102, 68, 3).
Aa
White text reads best on this color (8.77:1).
About this color
#664403 is a dark, moderately saturated brown. In OKLCH its lightness is 41%, its chroma 0.086 and its hue 76°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.012 away. White text reads best on it, at 8.77:1.
| Hue family | Browns |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #664403 |
| RGB | rgb(102, 68, 3) |
| HSL | hsl(39, 94%, 21%) |
| OKLCH | oklch(41.5% 0.086 75.8) |
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 #664403 | 8.77:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #664403 | 2.39:1 | Fails | Lc 14.2 | Not readable |
| #664403 text on white | 8.77:1 | AAA | Lc 89.8 | Fine for body text |
| #664403 text on black | 2.39:1 | Fails | Lc -12.5 | 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
#F0E9DF
oklch(93.7% 0.015 77.1)
-
Step 200
200
#E4D7C5
oklch(88.5% 0.028 76.2)
-
Step 300
300
#D4BD9D
oklch(81% 0.051 76)
-
Step 400
400
#BE9A67
oklch(70.8% 0.08 75.5)
-
Step 500
500
#AD803B
oklch(63.1% 0.102 75.6)
-
Step 600
600
#986912
oklch(55.6% 0.111 76.2)
-
Step 700
700
#825700
oklch(49.1% 0.103 75.7)
-
Step 800
800 (this color)
#664403
oklch(41.5% 0.086 75.8)
-
Step 900
900
#563C13
oklch(37.7% 0.067 75.2)
-
Step 950
950
#32230D
oklch(26.9% 0.042 74.9)
#664403 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) | #504600 | 0.042 |
| Deuteranopia (no green cones) | #584E06 | 0.037 |
| Tritanopia (no blue cones) | #703B39 | 0.072 |
| Achromatopsia (no color) | #4B4B4B | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #664403
#664403
oklch(41.5% 0.086 75.8)
- #2A4C79
#2A4C79
oklch(41.4% 0.086 256)
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 #664403, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.012
- Green Brown #544E03 ΔE 0.042
- Olive Brown #645403 ΔE 0.046
- Milk Chocolate #7F4E1E ΔE 0.060
- Medium Brown #7F5112 ΔE 0.063
- Chestnut #742802 ΔE 0.072
- Mud #735C12 ΔE 0.074
- Saddle Brown #8B4513 ΔE 0.075
Use #664403 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.