#663E4F
Closest named color: Purple Brown (#673A3F). oklch(41.7% 0.061 353), rgb(102, 62, 79).
Aa
White text reads best on this color (8.87:1).
About this color
#663E4F is a dark, muted red. In OKLCH its lightness is 42%, its chroma 0.061 and its hue 353°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.025 away. White text reads best on it, at 8.87:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.36:1 |
| White text | 8.87:1 |
Values
| HEX | #663E4F |
| RGB | rgb(102, 62, 79) |
| HSL | hsl(335, 24%, 32%) |
| OKLCH | oklch(41.7% 0.061 353) |
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 #663E4F | 8.87:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #663E4F | 2.36:1 | Fails | Lc 13.8 | Not readable |
| #663E4F text on white | 8.87:1 | AAA | Lc 90.2 | Preferred for body text |
| #663E4F text on black | 2.36:1 | Fails | Lc -12.1 | 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
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#F0E7EA
oklch(93.6% 0.011 354.9)
-
Step 200
200
#E4D4DA
oklch(88.5% 0.019 352.7)
-
Step 300
300
#D4B8C2
oklch(80.9% 0.035 354.3)
-
Step 400
400
#BE92A4
oklch(70.7% 0.058 352.3)
-
Step 500
500
#AD778D
oklch(63.1% 0.073 353.3)
-
Step 600
600
#976077
oklch(55.6% 0.078 353.2)
-
Step 700
700
#814F64
oklch(49.1% 0.073 353.4)
-
Step 800
800 (this color)
#663E4F
oklch(41.7% 0.061 353)
-
Step 900
900
#553744
oklch(37.6% 0.047 352)
-
Step 950
950
#322028
oklch(26.9% 0.031 351.1)
#663E4F 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) | #424650 | 0.066 |
| Deuteranopia (no green cones) | #4C4D4E | 0.061 |
| Tritanopia (no blue cones) | #6C3D44 | 0.021 |
| Achromatopsia (no color) | #4A4A4A | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663E4F
#663E4F
oklch(41.7% 0.061 353)
- #235749
#235749
oklch(41.7% 0.061 173)
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 #663E4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.025
- Brownish Purple #76424E ΔE 0.035
- Dark Mauve #874C62 ΔE 0.080
- Charcoal Grey #3C4142 ΔE 0.081
- Dusty Grape #545775 ΔE 0.082
- Chestnut #742802 ΔE 0.093
- Dusk #4E5481 ΔE 0.094
- Mud Brown #60460F ΔE 0.097
Use #663E4F 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.