#63357B
Closest named color: Rebecca Purple (#663399). oklch(41.9% 0.121 312.7), rgb(99, 53, 123).
Aa
White text reads best on this color (9.02:1).
About this color
#63357B is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.121 and its hue 313°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.050 away. White text reads best on it, at 9.02:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.32:1 |
| White text | 9.02:1 |
Values
| HEX | #63357B |
| RGB | rgb(99, 53, 123) |
| HSL | hsl(279, 40%, 35%) |
| OKLCH | oklch(41.9% 0.121 312.7) |
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 #63357B | 9.02:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #63357B | 2.32:1 | Fails | Lc 13.6 | Not readable |
| #63357B text on white | 9.02:1 | AAA | Lc 90.4 | Preferred for body text |
| #63357B text on black | 2.32:1 | Fails | Lc -11.9 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EFE6F4
oklch(93.6% 0.021 313.8)
-
Step 200
200
#E2D2EC
oklch(88.5% 0.039 312.6)
-
Step 300
300
#D1B4E2
oklch(81% 0.071 313)
-
Step 400
400
#B98BD3
oklch(70.7% 0.114 312.8)
-
Step 500
500
#A76DC7
oklch(63.1% 0.143 312.6)
-
Step 600
600
#9253B4
oklch(55.6% 0.156 312.4)
-
Step 700
700
#7D429B
oklch(49.1% 0.147 312.8)
-
Step 800
800 (this color)
#63357B
oklch(41.9% 0.121 312.7)
-
Step 900
900
#533165
oklch(37.8% 0.094 312.9)
-
Step 950
950
#301D3B
oklch(27% 0.059 312.1)
#63357B 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) | #22467D | 0.105 |
| Deuteranopia (no green cones) | #324A79 | 0.093 |
| Tritanopia (no blue cones) | #614152 | 0.083 |
| Achromatopsia (no color) | #494949 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63357B
#63357B
oklch(41.9% 0.121 312.7)
- #325900
#325900
oklch(41.8% 0.117 132.6)
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 #63357B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.057
- Blueberry #464196 ΔE 0.070
- Twilight #4E518B ΔE 0.078
- Purple #800080 ΔE 0.084
- Dusk #4E5481 ΔE 0.085
- Light Eggplant #894585 ΔE 0.088
- Grape Purple #5D1451 ΔE 0.092
Use #63357B 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.