#663133
Closest named color: Purple Brown (#673A3F). oklch(38.4% 0.076 18.9), rgb(102, 49, 51).
Aa
White text reads best on this color (10.23:1).
About this color
#663133 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.076 and its hue 19°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.026 away. White text reads best on it, at 10.23:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.076) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.05:1 |
| White text | 10.23:1 |
Values
| HEX | #663133 |
| RGB | rgb(102, 49, 51) |
| HSL | hsl(358, 35%, 30%) |
| OKLCH | oklch(38.4% 0.076 18.9) |
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 #663133 | 10.23:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #663133 | 2.05:1 | Fails | Lc 10.5 | Not readable |
| #663133 text on white | 10.23:1 | AAA | Lc 93.4 | Preferred for body text |
| #663133 text on black | 2.05:1 | Fails | Lc -9.1 | 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 900.
-
Step 50
50
#FBF3F3
oklch(97% 0.009 17.3)
-
Step 100
100
#F5E6E5
oklch(93.7% 0.016 22.1)
-
Step 200
200
#EED1D1
oklch(88.5% 0.033 17.8)
-
Step 300
300
#E3B2B2
oklch(80.8% 0.057 18.4)
-
Step 400
400
#D4898A
oklch(70.7% 0.092 18.8)
-
Step 500
500
#C66A6D
oklch(63% 0.117 18.9)
-
Step 600
600
#B15055
oklch(55.5% 0.127 19)
-
Step 700
700
#984045
oklch(49% 0.118 19.1)
-
Step 800
800
#7C3639
oklch(42.8% 0.098 19.5)
-
Step 900
900 (this color)
#663133
oklch(38.4% 0.076 18.9)
-
Step 950
950
#3B1C1D
oklch(27% 0.049 18.8)
#663133 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) | #3C3A33 | 0.082 |
| Deuteranopia (no green cones) | #4A4532 | 0.075 |
| Tritanopia (no blue cones) | #6F2A32 | 0.022 |
| Achromatopsia (no color) | #414141 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663133
#663133
oklch(38.4% 0.076 18.9)
- #004E50
#004E50
oklch(38.5% 0.065 197.8)
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 #663133, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.026
- Chestnut #742802 ΔE 0.054
- Brownish Purple #76424E ΔE 0.064
- Reddy Brown #6E1005 ΔE 0.067
- Wine Red #7B0323 ΔE 0.071
- Bordeaux #7B002C ΔE 0.075
- Blood #770001 ΔE 0.077
- Claret #680018 ΔE 0.079
Use #663133 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.