#633D9A
Closest named color: Rebecca Purple (#663399). oklch(45.2% 0.146 299.3), rgb(99, 61, 154).
Aa
White text reads best on this color (7.88:1).
About this color
#633D9A is a medium-dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.146 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.021 away. White text reads best on it, at 7.88:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #633D9A |
| RGB | rgb(99, 61, 154) |
| HSL | hsl(265, 43%, 42%) |
| OKLCH | oklch(45.2% 0.146 299.3) |
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 #633D9A | 7.88:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #633D9A | 2.66:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #633D9A text on white | 7.88:1 | AAA | Lc 87.0 | Fine for body text |
| #633D9A text on black | 2.66:1 | Fails | Lc -15.1 | Dividers and decoration only |
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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE7F9
oklch(93.7% 0.025 298.6)
-
Step 200
200
#DDD3F5
oklch(88.5% 0.047 298.9)
-
Step 300
300
#C8B5F1
oklch(81% 0.086 299)
-
Step 400
400
#AD8CE9
oklch(70.7% 0.136 299.3)
-
Step 500
500
#9A6CE2
oklch(63.1% 0.174 299.4)
-
Step 600
600
#8550D0
oklch(55.5% 0.19 299.2)
-
Step 700
700
#7140B4
oklch(49.1% 0.176 299.2)
-
Step 800
800 (this color)
#633D9A
oklch(45.2% 0.146 299.3)
-
Step 900
900
#4B3074
oklch(37.7% 0.113 299.2)
-
Step 950
950
#2C1D44
oklch(27.1% 0.071 299.4)
#633D9A 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) | #06519D | 0.109 |
| Deuteranopia (no green cones) | #1D5198 | 0.100 |
| Tritanopia (no blue cones) | #575165 | 0.113 |
| Achromatopsia (no color) | #515151 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633D9A
#633D9A
oklch(45.2% 0.146 299.3)
- #505E00
#505E00
oklch(45.4% 0.107 119.3)
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 #633D9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.021
- Blueberry #464196 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.054
- Twilight #4E518B ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.077
- Dusk #4E5481 ΔE 0.083
- Grape #7209B7 ΔE 0.083
Use #633D9A 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.