#63357C
Closest named color: Rebecca Purple (#663399). oklch(42% 0.122 312.2), rgb(99, 53, 124).
Aa
White text reads best on this color (9.00:1).
About this color
#63357C is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.122 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.049 away. White text reads best on it, at 9.00:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.122) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #63357C |
| RGB | rgb(99, 53, 124) |
| HSL | hsl(279, 40%, 35%) |
| OKLCH | oklch(42% 0.122 312.2) |
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 #63357C | 9.00:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #63357C | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #63357C text on white | 9.00:1 | AAA | Lc 90.3 | Preferred for body text |
| #63357C text on black | 2.33:1 | 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
#E2D2ED
oklch(88.5% 0.04 311.7)
-
Step 300
300
#D0B4E2
oklch(80.9% 0.07 312.1)
-
Step 400
400
#B98BD4
oklch(70.7% 0.115 312.4)
-
Step 500
500
#A76CC8
oklch(63% 0.146 312.4)
-
Step 600
600
#9252B5
oklch(55.5% 0.159 312.2)
-
Step 700
700
#7C429C
oklch(49% 0.148 311.9)
-
Step 800
800 (this color)
#63357C
oklch(42% 0.122 312.2)
-
Step 900
900
#523065
oklch(37.5% 0.095 312.2)
-
Step 950
950
#301D3B
oklch(27% 0.059 312.1)
#63357C 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) | #21477E | 0.106 |
| Deuteranopia (no green cones) | #314A7A | 0.094 |
| Tritanopia (no blue cones) | #604153 | 0.083 |
| Achromatopsia (no color) | #494949 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63357C
#63357C
oklch(42% 0.122 312.2)
- #335900
#335900
oklch(41.9% 0.117 132.2)
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 #63357C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.056
- Blueberry #464196 ΔE 0.069
- Twilight #4E518B ΔE 0.077
- Purple #800080 ΔE 0.083
- Dusk #4E5481 ΔE 0.085
- Light Eggplant #894585 ΔE 0.088
- Grape Purple #5D1451 ΔE 0.093
Use #63357C 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.