#633646
Closest named color: Purple Brown (#673A3F). oklch(39.4% 0.067 357.9), rgb(99, 54, 70).
Aa
White text reads best on this color (9.78:1).
About this color
#633646 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.067 and its hue 358°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.021 away. White text reads best on it, at 9.78:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.067) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #633646 |
| RGB | rgb(99, 54, 70) |
| HSL | hsl(339, 29%, 30%) |
| OKLCH | oklch(39.4% 0.067 357.9) |
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 #633646 | 9.78:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #633646 | 2.14:1 | Fails | Lc 11.5 | Not readable |
| #633646 text on white | 9.78:1 | AAA | Lc 92.5 | Preferred for body text |
| #633646 text on black | 2.14:1 | Fails | Lc -10.0 | 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
#FAF4F5
oklch(97.2% 0.007 5.6)
-
Step 100
100
#F3E6EA
oklch(93.6% 0.015 356.6)
-
Step 200
200
#EAD2D9
oklch(88.6% 0.028 358.1)
-
Step 300
300
#DDB4C0
oklch(81% 0.05 358.8)
-
Step 400
400
#CB8CA0
oklch(70.8% 0.081 358.7)
-
Step 500
500
#BB6E89
oklch(63.1% 0.103 358)
-
Step 600
600
#A75573
oklch(55.7% 0.113 358.2)
-
Step 700
700
#8F4560
oklch(49.2% 0.105 358.6)
-
Step 800
800
#74394F
oklch(42.7% 0.087 357.8)
-
Step 900
900 (this color)
#633646
oklch(39.4% 0.067 357.9)
-
Step 950
950
#371D26
oklch(26.9% 0.043 358.2)
#633646 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) | #3C3F47 | 0.074 |
| Deuteranopia (no green cones) | #474745 | 0.069 |
| Tritanopia (no blue cones) | #6A333C | 0.020 |
| Achromatopsia (no color) | #444444 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633646
#633646
oklch(39.4% 0.067 357.9)
- #0D5246
#0D5246
oklch(39.5% 0.068 177.7)
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 #633646, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.021
- Brownish Purple #76424E ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.077
- Chestnut #742802 ΔE 0.082
- Merlot #730039 ΔE 0.086
- Grape Purple #5D1451 ΔE 0.087
- Bordeaux #7B002C ΔE 0.087
- Onyx #343A40 ΔE 0.088
Use #633646 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.