#633E9F
Closest named color: Rebecca Purple (#663399). oklch(45.7% 0.151 297.7), rgb(99, 62, 159).
Aa
White text reads best on this color (7.71:1).
About this color
#633E9F is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.151 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.025 away. White text reads best on it, at 7.71:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.72:1 |
| White text | 7.71:1 |
Values
| HEX | #633E9F |
| RGB | rgb(99, 62, 159) |
| HSL | hsl(263, 44%, 43%) |
| OKLCH | oklch(45.7% 0.151 297.7) |
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 #633E9F | 7.71:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #633E9F | 2.72:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #633E9F text on white | 7.71:1 | AAA | Lc 86.4 | Fine for body text |
| #633E9F text on black | 2.72:1 | Fails | Lc -15.6 | 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
#EBE7F9
oklch(93.6% 0.024 296.1)
-
Step 200
200
#DCD3F6
oklch(88.5% 0.049 297.2)
-
Step 300
300
#C7B5F3
oklch(81% 0.088 297.7)
-
Step 400
400
#AB8CED
oklch(70.7% 0.141 297.4)
-
Step 500
500
#986BE7
oklch(63.1% 0.181 297.7)
-
Step 600
600
#844FD5
oklch(55.6% 0.197 297.9)
-
Step 700
700
#703FB8
oklch(49.2% 0.182 298)
-
Step 800
800 (this color)
#633E9F
oklch(45.7% 0.151 297.7)
-
Step 900
900
#4A2F77
oklch(37.6% 0.119 297.7)
-
Step 950
950
#2B1D46
oklch(27.1% 0.074 296.9)
#633E9F 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) | #0053A2 | 0.110 |
| Deuteranopia (no green cones) | #16529D | 0.103 |
| Tritanopia (no blue cones) | #555368 | 0.118 |
| Achromatopsia (no color) | #535353 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633E9F
#633E9F
oklch(45.7% 0.151 297.7)
- #535E00
#535E00
oklch(45.6% 0.106 117.4)
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 #633E9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.025
- Blueberry #464196 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.064
- Twilight #4E518B ΔE 0.068
- Blue With A Hint Of Purple #533CC6 ΔE 0.070
- Blurple #5539CC ΔE 0.078
- Grape #7209B7 ΔE 0.080
Use #633E9F 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.