#633E51
Closest named color: Purple Brown (#673A3F). oklch(41.4% 0.059 347.8), rgb(99, 62, 81).
Aa
White text reads best on this color (8.98:1).
About this color
#633E51 is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.059 and its hue 348°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.029 away. White text reads best on it, at 8.98:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.059) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #633E51 |
| RGB | rgb(99, 62, 81) |
| HSL | hsl(329, 23%, 32%) |
| OKLCH | oklch(41.4% 0.059 347.8) |
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 #633E51 | 8.98:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #633E51 | 2.33:1 | Fails | Lc 13.5 | Not readable |
| #633E51 text on white | 8.98:1 | AAA | Lc 90.5 | Preferred for body text |
| #633E51 text on black | 2.33:1 | Fails | Lc -11.8 | 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
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#EFE7EB
oklch(93.5% 0.01 345.4)
-
Step 200
200
#E3D4DB
oklch(88.4% 0.019 347.5)
-
Step 300
300
#D2B8C4
oklch(80.8% 0.034 348.3)
-
Step 400
400
#BB93A7
oklch(70.7% 0.055 347.1)
-
Step 500
500
#AA7891
oklch(63.1% 0.071 347.9)
-
Step 600
600
#95617B
oklch(55.7% 0.076 348.5)
-
Step 700
700
#7F5068
oklch(49.2% 0.071 348.1)
-
Step 800
800 (this color)
#633E51
oklch(41.4% 0.059 347.8)
-
Step 900
900
#543846
oklch(37.8% 0.045 348.1)
-
Step 950
950
#312129
oklch(27% 0.028 347.7)
#633E51 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) | #414552 | 0.061 |
| Deuteranopia (no green cones) | #4A4B50 | 0.056 |
| Tritanopia (no blue cones) | #683D45 | 0.021 |
| Achromatopsia (no color) | #494949 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633E51
#633E51
oklch(41.4% 0.059 347.8)
- #275645
#275645
oklch(41.5% 0.059 167.5)
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 #633E51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.029
- Brownish Purple #76424E ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.077
- Dusty Grape #545775 ΔE 0.080
- Dark Mauve #874C62 ΔE 0.084
- Dusk #4E5481 ΔE 0.090
- Onyx #343A40 ΔE 0.092
- Dark Grey Blue #29465B ΔE 0.093
Use #633E51 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.