#663C44
Closest named color: Purple Brown (#673A3F). oklch(40.9% 0.06 7.7), rgb(102, 60, 68).
Aa
White text reads best on this color (9.15:1).
About this color
#663C44 is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.060 and its hue 8°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.008 away. White text reads best on it, at 9.15:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.060) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #663C44 |
| RGB | rgb(102, 60, 68) |
| HSL | hsl(349, 26%, 32%) |
| OKLCH | oklch(40.9% 0.06 7.7) |
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 #663C44 | 9.15:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #663C44 | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #663C44 text on white | 9.15:1 | AAA | Lc 90.9 | Preferred for body text |
| #663C44 text on black | 2.29:1 | Fails | Lc -11.4 | 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
#F0E7E8
oklch(93.5% 0.01 9.5)
-
Step 200
200
#E5D4D7
oklch(88.5% 0.019 5.3)
-
Step 300
300
#D6B8BC
oklch(81% 0.035 8.8)
-
Step 400
400
#C0939A
oklch(70.8% 0.055 8.2)
-
Step 500
500
#B07781
oklch(63.1% 0.073 7.8)
-
Step 600
600
#9B606B
oklch(55.7% 0.078 7.8)
-
Step 700
700
#844F59
oklch(49.1% 0.072 7.8)
-
Step 800
800 (this color)
#663C44
oklch(40.9% 0.06 7.7)
-
Step 900
900
#57373D
oklch(37.7% 0.047 7.3)
-
Step 950
950
#332024
oklch(26.9% 0.03 5.5)
#663C44 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) | #434344 | 0.065 |
| Deuteranopia (no green cones) | #4D4B43 | 0.061 |
| Tritanopia (no blue cones) | #6D383F | 0.016 |
| Achromatopsia (no color) | #484848 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663C44
#663C44
oklch(40.9% 0.06 7.7)
- #1A5550
#1A5550
oklch(41% 0.06 187.2)
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 #663C44, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.008
- Brownish Purple #76424E ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.077
- Chestnut #742802 ΔE 0.077
- Mud Brown #60460F ΔE 0.083
- Red Brown #8B2E16 ΔE 0.087
- Dark Mauve #874C62 ΔE 0.088
- Onyx #343A40 ΔE 0.093
Use #663C44 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.