#663C4D
Closest named color: Purple Brown (#673A3F). oklch(41.2% 0.063 354.4), rgb(102, 60, 77).
Aa
White text reads best on this color (9.05:1).
About this color
#663C4D is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.063 and its hue 354°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.022 away. White text reads best on it, at 9.05:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.063) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.31:1 |
| White text | 9.05:1 |
Values
| HEX | #663C4D |
| RGB | rgb(102, 60, 77) |
| HSL | hsl(336, 26%, 32%) |
| OKLCH | oklch(41.2% 0.063 354.4) |
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 #663C4D | 9.05:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #663C4D | 2.31:1 | Fails | Lc 13.3 | Not readable |
| #663C4D text on white | 9.05:1 | AAA | Lc 90.7 | Preferred for body text |
| #663C4D text on black | 2.31:1 | 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#F0E7EA
oklch(93.6% 0.011 354.9)
-
Step 200
200
#E5D4DA
oklch(88.5% 0.02 354.1)
-
Step 300
300
#D5B7C2
oklch(80.8% 0.037 353.9)
-
Step 400
400
#BF92A3
oklch(70.7% 0.059 354.2)
-
Step 500
500
#AE768C
oklch(63% 0.076 354.3)
-
Step 600
600
#995F76
oklch(55.6% 0.081 354.7)
-
Step 700
700
#834E63
oklch(49.2% 0.076 355)
-
Step 800
800 (this color)
#663C4D
oklch(41.2% 0.063 354.4)
-
Step 900
900
#573643
oklch(37.7% 0.051 354.6)
-
Step 950
950
#332027
oklch(27% 0.031 355.6)
#663C4D 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) | #41444E | 0.068 |
| Deuteranopia (no green cones) | #4B4B4C | 0.063 |
| Tritanopia (no blue cones) | #6C3A42 | 0.020 |
| Achromatopsia (no color) | #494949 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663C4D
#663C4D
oklch(41.2% 0.063 354.4)
- #1D5649
#1D5649
oklch(41.2% 0.063 175.3)
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 #663C4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.022
- Brownish Purple #76424E ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.080
- Dark Mauve #874C62 ΔE 0.083
- Dusty Grape #545775 ΔE 0.088
- Chestnut #742802 ΔE 0.090
- Red Purple #820747 ΔE 0.095
- Onyx #343A40 ΔE 0.096
Use #663C4D 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.