#633F97
Closest named color: Rebecca Purple (#663399). oklch(45.3% 0.139 299.7), rgb(99, 63, 151).
Aa
White text reads best on this color (7.81:1).
About this color
#633F97 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.139 and its hue 300°. 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 7.81:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #633F97 |
| RGB | rgb(99, 63, 151) |
| HSL | hsl(265, 41%, 42%) |
| OKLCH | oklch(45.3% 0.139 299.7) |
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 #633F97 | 7.81:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #633F97 | 2.68:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #633F97 text on white | 7.81:1 | AAA | Lc 86.8 | Fine for body text |
| #633F97 text on black | 2.68:1 | Fails | Lc -15.3 | 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
#ECE7F8
oklch(93.7% 0.023 299.4)
-
Step 200
200
#DDD3F3
oklch(88.5% 0.045 299.7)
-
Step 300
300
#C8B5EE
oklch(80.8% 0.082 299.8)
-
Step 400
400
#AD8DE6
oklch(70.8% 0.131 299.6)
-
Step 500
500
#9A6EDE
oklch(63.2% 0.166 299.8)
-
Step 600
600
#8552CC
oklch(55.6% 0.182 299.7)
-
Step 700
700
#7142B0
oklch(49.1% 0.168 299.9)
-
Step 800
800 (this color)
#633F97
oklch(45.3% 0.139 299.7)
-
Step 900
900
#4B3172
oklch(37.7% 0.109 299.7)
-
Step 950
950
#2C1D43
oklch(27% 0.07 300)
#633F97 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) | #16529A | 0.102 |
| Deuteranopia (no green cones) | #245195 | 0.094 |
| Tritanopia (no blue cones) | #585165 | 0.106 |
| Achromatopsia (no color) | #525252 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633F97
#633F97
oklch(45.3% 0.139 299.7)
- #4F5E00
#4F5E00
oklch(45.3% 0.107 119.9)
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 #633F97, 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 0.050
- Dark Slate Blue #483D8B ΔE 0.052
- Twilight #4E518B ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.077
- Dusk #4E5481 ΔE 0.077
- Blue With A Hint Of Purple #533CC6 ΔE 0.082
- Light Eggplant #894585 ΔE 0.083
Use #633F97 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.