#633BA4
Closest named color: Rebecca Purple (#663399). oklch(45.7% 0.162 297.1), rgb(99, 59, 164).
Aa
White text reads best on this color (7.80:1).
About this color
#633BA4 is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.162 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 0.024 away. White text reads best on it, at 7.80:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.162) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.69:1 |
| White text | 7.80:1 |
Values
| HEX | #633BA4 |
| RGB | rgb(99, 59, 164) |
| HSL | hsl(263, 47%, 44%) |
| OKLCH | oklch(45.7% 0.162 297.1) |
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 #633BA4 | 7.80:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #633BA4 | 2.69:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #633BA4 text on white | 7.80:1 | AAA | Lc 86.6 | Fine for body text |
| #633BA4 text on black | 2.69:1 | 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
#EBE6FA
oklch(93.5% 0.027 297.3)
-
Step 200
200
#DCD3F8
oklch(88.6% 0.051 296.5)
-
Step 300
300
#C7B4F7
oklch(80.9% 0.095 297.2)
-
Step 400
400
#AB8AF2
oklch(70.6% 0.151 297)
-
Step 500
500
#9868EE
oklch(63% 0.194 297)
-
Step 600
600
#844BDC
oklch(55.6% 0.21 297.1)
-
Step 700
700
#703BBF
oklch(49.2% 0.195 297)
-
Step 800
800 (this color)
#633BA4
oklch(45.7% 0.162 297.1)
-
Step 900
900
#4A2E7B
oklch(37.8% 0.125 296.7)
-
Step 950
950
#2B1C48
oklch(27.1% 0.079 296.5)
#633BA4 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) | #0053A7 | 0.112 |
| Deuteranopia (no green cones) | #0051A2 | 0.112 |
| Tritanopia (no blue cones) | #53536A | 0.126 |
| Achromatopsia (no color) | #525252 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633BA4
#633BA4
oklch(45.7% 0.162 297.1)
- #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 #633BA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.024
- Blueberry #464196 ΔE 0.055
- Bluey Purple #6241C7 ΔE 0.057
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.062
- Blurple #5539CC ΔE 0.070
- Grape #7209B7 ΔE 0.071
- Chrysanthemum #560BAD ΔE 0.076
Use #633BA4 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.