#633D7B
Closest named color: Dark Slate Blue (#483D8B). oklch(43.2% 0.107 310.9), rgb(99, 61, 123).
Aa
White text reads best on this color (8.45:1).
About this color
#633D7B is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.107 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 8.45:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.48:1 |
| White text | 8.45:1 |
Values
| HEX | #633D7B |
| RGB | rgb(99, 61, 123) |
| HSL | hsl(277, 34%, 36%) |
| OKLCH | oklch(43.2% 0.107 310.9) |
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 #633D7B | 8.45:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #633D7B | 2.48:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #633D7B text on white | 8.45:1 | AAA | Lc 88.9 | Fine for body text |
| #633D7B text on black | 2.48:1 | Fails | Lc -13.3 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EEE7F3
oklch(93.7% 0.018 311.6)
-
Step 200
200
#E0D3EA
oklch(88.4% 0.034 310.7)
-
Step 300
300
#CEB6DF
oklch(81% 0.062 311.2)
-
Step 400
400
#B58FCF
oklch(70.8% 0.1 311)
-
Step 500
500
#A272C2
oklch(63.2% 0.127 310.8)
-
Step 600
600
#8D58AE
oklch(55.5% 0.139 311.1)
-
Step 700
700
#784896
oklch(49.1% 0.129 310.9)
-
Step 800
800 (this color)
#633D7B
oklch(43.2% 0.107 310.9)
-
Step 900
900
#503362
oklch(37.7% 0.085 311.4)
-
Step 950
950
#2F1E39
oklch(26.9% 0.053 312.1)
#633D7B 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) | #2E4B7D | 0.087 |
| Deuteranopia (no green cones) | #394E79 | 0.079 |
| Tritanopia (no blue cones) | #604756 | 0.075 |
| Achromatopsia (no color) | #4D4D4D | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633D7B
#633D7B
oklch(43.2% 0.107 310.9)
- #3B5C11
#3B5C11
oklch(43.3% 0.108 130.9)
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 #633D7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Rebecca Purple #663399 ΔE 0.057
- Twilight #4E518B ΔE 0.062
- Blueberry #464196 ΔE 0.067
- Dusk #4E5481 ΔE 0.067
- Dusty Grape #545775 ΔE 0.078
- Light Eggplant #894585 ΔE 0.079
- Brownish Purple #76424E ΔE 0.089
Use #633D7B 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.