#663D49
Closest named color: Purple Brown (#673A3F). oklch(41.3% 0.06 1.1), rgb(102, 61, 73).
Aa
White text reads best on this color (9.01:1).
About this color
#663D49 is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.060 and its hue 1°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.016 away. White text reads best on it, at 9.01:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.060) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.32:1 |
| White text | 9.01:1 |
Values
| HEX | #663D49 |
| RGB | rgb(102, 61, 73) |
| HSL | hsl(342, 25%, 32%) |
| OKLCH | oklch(41.3% 0.06 1.1) |
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 #663D49 | 9.01:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #663D49 | 2.32:1 | Fails | Lc 13.4 | Not readable |
| #663D49 text on white | 9.01:1 | AAA | Lc 90.6 | Preferred for body text |
| #663D49 text on black | 2.32:1 | Fails | Lc -11.7 | 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
#F0E7E9
oklch(93.6% 0.01 2)
-
Step 200
200
#E5D4D8
oklch(88.5% 0.02 1.4)
-
Step 300
300
#D5B8BF
oklch(81% 0.034 1.6)
-
Step 400
400
#BF929E
oklch(70.6% 0.056 1)
-
Step 500
500
#AE7787
oklch(63% 0.072 0.4)
-
Step 600
600
#996070
oklch(55.6% 0.077 1.7)
-
Step 700
700
#834F5E
oklch(49.2% 0.072 1.4)
-
Step 800
800 (this color)
#663D49
oklch(41.3% 0.06 1.1)
-
Step 900
900
#563740
oklch(37.6% 0.046 0.6)
-
Step 950
950
#332025
oklch(26.9% 0.03 2.1)
#663D49 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) | #434449 | 0.065 |
| Deuteranopia (no green cones) | #4D4C48 | 0.061 |
| Tritanopia (no blue cones) | #6C3A41 | 0.016 |
| Achromatopsia (no color) | #494949 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663D49
#663D49
oklch(41.3% 0.06 1.1)
- #1E564D
#1E564D
oklch(41.4% 0.06 180.8)
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 #663D49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.016
- Brownish Purple #76424E ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.078
- Dark Mauve #874C62 ΔE 0.084
- Chestnut #742802 ΔE 0.084
- Dusty Grape #545775 ΔE 0.089
- Mud Brown #60460F ΔE 0.089
- Red Brown #8B2E16 ΔE 0.092
Use #663D49 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.