#63309B
Closest named color: Rebecca Purple (#663399). oklch(43.4% 0.166 301.6), rgb(99, 48, 155).
Aa
White text reads best on this color (8.65:1).
About this color
#63309B is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.166 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.010 away. White text reads best on it, at 8.65:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #63309B |
| RGB | rgb(99, 48, 155) |
| HSL | hsl(269, 53%, 40%) |
| OKLCH | oklch(43.4% 0.166 301.6) |
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 #63309B | 8.65:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #63309B | 2.42:1 | Fails | Lc 14.9 | Not readable |
| #63309B text on white | 8.65:1 | AAA | Lc 89.1 | Fine for body text |
| #63309B text on black | 2.42:1 | Fails | Lc -13.1 | Not readable |
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
#F7F4FD
oklch(97.2% 0.012 301.3)
-
Step 100
100
#EDE6FA
oklch(93.6% 0.028 301.7)
-
Step 200
200
#DFD1F8
oklch(88.4% 0.055 301.6)
-
Step 300
300
#CCB2F5
oklch(80.9% 0.097 302.1)
-
Step 400
400
#B287F1
oklch(70.7% 0.155 301.3)
-
Step 500
500
#A164EB
oklch(63.2% 0.198 301.9)
-
Step 600
600
#8C45DA
oklch(55.6% 0.216 301.5)
-
Step 700
700
#7735BD
oklch(49.1% 0.201 301.4)
-
Step 800
800 (this color)
#63309B
oklch(43.4% 0.166 301.6)
-
Step 900
900
#4F2B7A
oklch(37.8% 0.13 301.4)
-
Step 950
950
#2E1A47
oklch(27% 0.082 301.7)
#63309B 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) | #004B9E | 0.122 |
| Deuteranopia (no green cones) | #004B99 | 0.123 |
| Tritanopia (no blue cones) | #574961 | 0.124 |
| Achromatopsia (no color) | #4C4C4C | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63309B
#63309B
oklch(43.4% 0.166 301.6)
- #485900
#485900
oklch(43.4% 0.105 121.6)
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 #63309B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.010
- Dark Slate Blue #483D8B ΔE 0.060
- Blueberry #464196 ΔE 0.061
- Chrysanthemum #560BAD ΔE 0.063
- Grape #7209B7 ΔE 0.064
- Bluey Purple #6241C7 ΔE 0.078
- Blue With A Hint Of Purple #533CC6 ΔE 0.079
- Imperial Purple #480CA8 ΔE 0.080
Use #63309B 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.