#663A01
Closest named color: Mud Brown (#60460F). oklch(39.4% 0.088 64.3), rgb(102, 58, 1).
Aa
White text reads best on this color (9.67:1).
About this color
#663A01 is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.088 and its hue 64°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.033 away. White text reads best on it, at 9.67:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.17:1 |
| White text | 9.67:1 |
Values
| HEX | #663A01 |
| RGB | rgb(102, 58, 1) |
| HSL | hsl(34, 98%, 20%) |
| OKLCH | oklch(39.4% 0.088 64.3) |
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 #663A01 | 9.67:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #663A01 | 2.17:1 | Fails | Lc 11.9 | Not readable |
| #663A01 text on white | 9.67:1 | AAA | Lc 92.1 | Preferred for body text |
| #663A01 text on black | 2.17:1 | Fails | Lc -10.3 | 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 900.
-
Step 50
50
#FAF4EF
oklch(97% 0.009 62.6)
-
Step 100
100
#F3E8DD
oklch(93.7% 0.019 67.6)
-
Step 200
200
#EBD5C1
oklch(88.6% 0.036 64.6)
-
Step 300
300
#DFB894
oklch(80.8% 0.066 64.4)
-
Step 400
400
#CF9256
oklch(70.8% 0.106 64.2)
-
Step 500
500
#C17517
oklch(63.1% 0.136 64.2)
-
Step 600
600
#A56100
oklch(55.7% 0.126 64.5)
-
Step 700
700
#8B5100
oklch(49.2% 0.111 64.6)
-
Step 800
800
#734100
oklch(42.7% 0.097 63.4)
-
Step 900
900 (this color)
#663A01
oklch(39.4% 0.088 64.3)
-
Step 950
950
#392004
oklch(27.1% 0.056 64.7)
#663A01 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) | #483E00 | 0.059 |
| Deuteranopia (no green cones) | #524802 | 0.053 |
| Tritanopia (no blue cones) | #703030 | 0.065 |
| Achromatopsia (no color) | #444444 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663A01
#663A01
oklch(39.4% 0.088 64.3)
- #104A72
#104A72
oklch(39.5% 0.088 244.4)
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 #663A01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.033
- Chestnut #742802 ΔE 0.049
- Green Brown #544E03 ΔE 0.064
- Purple Brown #673A3F ΔE 0.070
- Olive Brown #645403 ΔE 0.074
- Rust Brown #8B3103 ΔE 0.076
- Milk Chocolate #7F4E1E ΔE 0.077
- Red Brown #8B2E16 ΔE 0.081
Use #663A01 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.