#633747
Closest named color: Purple Brown (#673A3F). oklch(39.7% 0.066 357.3), rgb(99, 55, 71).
Aa
White text reads best on this color (9.68:1).
About this color
#633747 is a dark, muted red. In OKLCH its lightness is 40%, its chroma 0.066 and its hue 357°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.020 away. White text reads best on it, at 9.68:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | muted (0.066) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.16:1 |
| White text | 9.68:1 |
Values
| HEX | #633747 |
| RGB | rgb(99, 55, 71) |
| HSL | hsl(338, 29%, 30%) |
| OKLCH | oklch(39.7% 0.066 357.3) |
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 #633747 | 9.68:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #633747 | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #633747 text on white | 9.68:1 | AAA | Lc 92.3 | Preferred for body text |
| #633747 text on black | 2.16:1 | Fails | Lc -10.2 | 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
#F9F4F5
oklch(97.1% 0.006 3.3)
-
Step 100
100
#F2E6EA
oklch(93.6% 0.014 355)
-
Step 200
200
#E9D2D9
oklch(88.5% 0.027 357.3)
-
Step 300
300
#DCB4C1
oklch(80.9% 0.049 356.8)
-
Step 400
400
#CA8CA1
oklch(70.7% 0.08 357.3)
-
Step 500
500
#BA6F8A
oklch(63.1% 0.1 357.3)
-
Step 600
600
#A55674
oklch(55.6% 0.109 357.1)
-
Step 700
700
#8E4661
oklch(49.2% 0.102 357.8)
-
Step 800
800
#733A4F
oklch(42.8% 0.084 357.8)
-
Step 900
900 (this color)
#633747
oklch(39.7% 0.066 357.3)
-
Step 950
950
#371D27
oklch(26.9% 0.043 355.8)
#633747 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) | #3D4048 | 0.072 |
| Deuteranopia (no green cones) | #484746 | 0.065 |
| Tritanopia (no blue cones) | #69353D | 0.019 |
| Achromatopsia (no color) | #444444 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633747
#633747
oklch(39.7% 0.066 357.3)
- #125246
#125246
oklch(39.6% 0.066 177.2)
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 #633747, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.020
- Brownish Purple #76424E ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.076
- Chestnut #742802 ΔE 0.083
- Merlot #730039 ΔE 0.088
- Onyx #343A40 ΔE 0.088
- Grape Purple #5D1451 ΔE 0.089
- Bordeaux #7B002C ΔE 0.089
Use #633747 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.