#63308A
Closest named color: Rebecca Purple (#663399). oklch(42.1% 0.147 307.3), rgb(99, 48, 138).
Aa
White text reads best on this color (9.05:1).
About this color
#63308A is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.147 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.026 away. White text reads best on it, at 9.05:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.32:1 |
| White text | 9.05:1 |
Values
| HEX | #63308A |
| RGB | rgb(99, 48, 138) |
| HSL | hsl(274, 48%, 36%) |
| OKLCH | oklch(42.1% 0.147 307.3) |
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 #63308A | 9.05:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #63308A | 2.32:1 | Fails | Lc 13.7 | Not readable |
| #63308A text on white | 9.05:1 | AAA | Lc 90.3 | Preferred for body text |
| #63308A text on black | 2.32:1 | Fails | Lc -12.0 | 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
#EEE6F7
oklch(93.6% 0.024 307)
-
Step 200
200
#E1D1F2
oklch(88.4% 0.048 307.2)
-
Step 300
300
#CFB2EC
oklch(80.8% 0.086 307.3)
-
Step 400
400
#B788E3
oklch(70.7% 0.137 307)
-
Step 500
500
#A667DA
oklch(63.1% 0.175 307.4)
-
Step 600
600
#914BC8
oklch(55.6% 0.19 307)
-
Step 700
700
#7C3BAD
oklch(49.2% 0.177 307.3)
-
Step 800
800 (this color)
#63308A
oklch(42.1% 0.147 307.3)
-
Step 900
900
#522D70
oklch(37.7% 0.115 307.3)
-
Step 950
950
#301B41
oklch(27% 0.072 307.8)
#63308A 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) | #00478D | 0.125 |
| Deuteranopia (no green cones) | #1E4988 | 0.113 |
| Tritanopia (no blue cones) | #5D4258 | 0.104 |
| Achromatopsia (no color) | #494949 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63308A
#63308A
oklch(42.1% 0.147 307.3)
- #3D5800
#3D5800
oklch(42.3% 0.11 127.3)
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 #63308A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.026
- Dark Slate Blue #483D8B ΔE 0.055
- Blueberry #464196 ΔE 0.064
- Purple #800080 ΔE 0.077
- Chrysanthemum #560BAD ΔE 0.082
- Twilight #4E518B ΔE 0.086
- Grape #7209B7 ΔE 0.086
- Dark Magenta #8B008B ΔE 0.090
Use #63308A 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.