#663E15
Closest named color: Mud Brown (#60460F). oklch(40.3% 0.078 62.6), rgb(102, 62, 21).
Aa
White text reads best on this color (9.27:1).
About this color
#663E15 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.078 and its hue 63°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.027 away. White text reads best on it, at 9.27:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #663E15 |
| RGB | rgb(102, 62, 21) |
| HSL | hsl(30, 66%, 24%) |
| OKLCH | oklch(40.3% 0.078 62.6) |
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 #663E15 | 9.27:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #663E15 | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #663E15 text on white | 9.27:1 | AAA | Lc 91.2 | Preferred for body text |
| #663E15 text on black | 2.26:1 | Fails | Lc -11.2 | 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
#F9F5F1
oklch(97.2% 0.007 67.7)
-
Step 100
100
#F1E8E1
oklch(93.6% 0.014 60.6)
-
Step 200
200
#E6D6C8
oklch(88.5% 0.026 63.7)
-
Step 300
300
#D7BBA3
oklch(81% 0.046 62.7)
-
Step 400
400
#C29771
oklch(70.8% 0.073 62.7)
-
Step 500
500
#B27C4B
oklch(63.1% 0.094 62)
-
Step 600
600
#9D652D
oklch(55.7% 0.101 62.8)
-
Step 700
700
#865320
oklch(49% 0.094 62.1)
-
Step 800
800 (this color)
#663E15
oklch(40.3% 0.078 62.6)
-
Step 900
900
#583A1D
oklch(37.7% 0.06 63.2)
-
Step 950
950
#342212
oklch(27% 0.038 61.7)
#663E15 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) | #4A4210 | 0.055 |
| Deuteranopia (no green cones) | #544B16 | 0.048 |
| Tritanopia (no blue cones) | #703535 | 0.057 |
| Achromatopsia (no color) | #474747 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663E15
#663E15
oklch(40.3% 0.078 62.6)
- #1B4D6F
#1B4D6F
oklch(40.4% 0.078 242.2)
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 #663E15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.027
- Chestnut #742802 ΔE 0.054
- Green Brown #544E03 ΔE 0.061
- Purple Brown #673A3F ΔE 0.061
- Olive Brown #645403 ΔE 0.068
- Milk Chocolate #7F4E1E ΔE 0.069
- Rust Brown #8B3103 ΔE 0.075
- Medium Brown #7F5112 ΔE 0.075
Use #663E15 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.