#633AA6
Closest named color: Rebecca Purple (#663399). oklch(45.7% 0.166 296.8), rgb(99, 58, 166).
Aa
White text reads best on this color (7.81:1).
About this color
#633AA6 is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.166 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 0.025 away. White text reads best on it, at 7.81:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #633AA6 |
| RGB | rgb(99, 58, 166) |
| HSL | hsl(263, 48%, 44%) |
| OKLCH | oklch(45.7% 0.166 296.8) |
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 #633AA6 | 7.81:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #633AA6 | 2.68:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #633AA6 text on white | 7.81:1 | AAA | Lc 86.6 | Fine for body text |
| #633AA6 text on black | 2.68:1 | Fails | Lc -15.5 | 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
#EBE6FB
oklch(93.5% 0.029 296.7)
-
Step 200
200
#DCD2F9
oklch(88.4% 0.054 297)
-
Step 300
300
#C7B4F8
oklch(81% 0.096 297)
-
Step 400
400
#AB89F5
oklch(70.6% 0.156 296.7)
-
Step 500
500
#9867F0
oklch(63% 0.198 296.8)
-
Step 600
600
#8449DF
oklch(55.6% 0.216 296.8)
-
Step 700
700
#7039C1
oklch(49.1% 0.2 296.8)
-
Step 800
800 (this color)
#633AA6
oklch(45.7% 0.166 296.8)
-
Step 900
900
#4A2D7C
oklch(37.7% 0.128 296.7)
-
Step 950
950
#2B1B49
oklch(26.9% 0.082 296.5)
#633AA6 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) | #0052A9 | 0.112 |
| Deuteranopia (no green cones) | #0051A4 | 0.112 |
| Tritanopia (no blue cones) | #52536B | 0.128 |
| Achromatopsia (no color) | #525252 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633AA6
#633AA6
oklch(45.7% 0.166 296.8)
- #545E00
#545E00
oklch(45.7% 0.105 116.7)
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 #633AA6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.025
- Bluey Purple #6241C7 ΔE 0.054
- Blueberry #464196 ΔE 0.057
- Blue With A Hint Of Purple #533CC6 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.065
- Blurple #5539CC ΔE 0.067
- Grape #7209B7 ΔE 0.068
- Chrysanthemum #560BAD ΔE 0.074
Use #633AA6 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.