#633DA3
Closest named color: Rebecca Purple (#663399). oklch(45.9% 0.158 296.9), rgb(99, 61, 163).
Aa
White text reads best on this color (7.70:1).
About this color
#633DA3 is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.158 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.026 away. White text reads best on it, at 7.70:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.158) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.72:1 |
| White text | 7.70:1 |
Values
| HEX | #633DA3 |
| RGB | rgb(99, 61, 163) |
| HSL | hsl(262, 46%, 44%) |
| OKLCH | oklch(45.9% 0.158 296.9) |
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 #633DA3 | 7.70:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #633DA3 | 2.72:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #633DA3 text on white | 7.70:1 | AAA | Lc 86.3 | Fine for body text |
| #633DA3 text on black | 2.72:1 | Fails | Lc -15.7 | 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
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#EBE7FA
oklch(93.7% 0.026 295.5)
-
Step 200
200
#DCD3F8
oklch(88.6% 0.051 296.5)
-
Step 300
300
#C6B4F5
oklch(80.8% 0.092 297)
-
Step 400
400
#AB8BF1
oklch(70.8% 0.148 296.9)
-
Step 500
500
#976AEB
oklch(63.1% 0.188 296.8)
-
Step 600
600
#834DDA
oklch(55.6% 0.205 296.8)
-
Step 700
700
#6F3DBD
oklch(49.2% 0.19 296.7)
-
Step 800
800 (this color)
#633DA3
oklch(45.9% 0.158 296.9)
-
Step 900
900
#4A2E7A
oklch(37.7% 0.124 297)
-
Step 950
950
#2B1C47
oklch(27% 0.078 297)
#633DA3 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) | #0053A6 | 0.110 |
| Deuteranopia (no green cones) | #0852A1 | 0.108 |
| Tritanopia (no blue cones) | #54546A | 0.123 |
| Achromatopsia (no color) | #535353 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633DA3
#633DA3
oklch(45.9% 0.158 296.9)
- #545F00
#545F00
oklch(46% 0.106 117.3)
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 #633DA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.026
- Blueberry #464196 ΔE 0.054
- Bluey Purple #6241C7 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.064
- Blurple #5539CC ΔE 0.071
- Twilight #4E518B ΔE 0.074
- Grape #7209B7 ΔE 0.075
Use #633DA3 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.