#63398F
Closest named color: Rebecca Purple (#663399). oklch(43.8% 0.139 303.7), rgb(99, 57, 143).
Aa
White text reads best on this color (8.35:1).
About this color
#63398F is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.139 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.022 away. White text reads best on it, at 8.35:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.51:1 |
| White text | 8.35:1 |
Values
| HEX | #63398F |
| RGB | rgb(99, 57, 143) |
| HSL | hsl(269, 43%, 39%) |
| OKLCH | oklch(43.8% 0.139 303.7) |
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 #63398F | 8.35:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #63398F | 2.51:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #63398F text on white | 8.35:1 | AAA | Lc 88.5 | Fine for body text |
| #63398F text on black | 2.51:1 | Fails | Lc -13.7 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F7
oklch(93.5% 0.024 304.5)
-
Step 200
200
#DFD2F2
oklch(88.4% 0.046 303.9)
-
Step 300
300
#CBB4EC
oklch(80.8% 0.081 303.4)
-
Step 400
400
#B28BE2
oklch(70.7% 0.13 303.9)
-
Step 500
500
#9F6CDA
oklch(63.1% 0.165 303.4)
-
Step 600
600
#8B50C7
oklch(55.6% 0.18 304)
-
Step 700
700
#7640AC
oklch(49.1% 0.167 303.9)
-
Step 800
800 (this color)
#63398F
oklch(43.8% 0.139 303.7)
-
Step 900
900
#4E306F
oklch(37.7% 0.107 303.7)
-
Step 950
950
#2E1D41
oklch(27.1% 0.067 304.1)
#63398F 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) | #114D92 | 0.110 |
| Deuteranopia (no green cones) | #254E8D | 0.100 |
| Tritanopia (no blue cones) | #5B4A5E | 0.102 |
| Achromatopsia (no color) | #4E4E4E | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63398F
#63398F
oklch(43.8% 0.139 303.7)
- #465B00
#465B00
oklch(43.8% 0.108 123.7)
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 #63398F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.022
- Dark Slate Blue #483D8B ΔE 0.049
- Blueberry #464196 ΔE 0.053
- Twilight #4E518B ΔE 0.069
- Dusk #4E5481 ΔE 0.083
- Light Eggplant #894585 ΔE 0.085
- Chrysanthemum #560BAD ΔE 0.089
- Grape #7209B7 ΔE 0.090
Use #63398F 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.