#633679
Closest named color: Rebecca Purple (#663399). oklch(41.9% 0.117 313.4), rgb(99, 54, 121).
Aa
White text reads best on this color (8.99:1).
About this color
#633679 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.117 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 0.054 away. White text reads best on it, at 8.99:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.117) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.33:1 |
| White text | 8.99:1 |
Values
| HEX | #633679 |
| RGB | rgb(99, 54, 121) |
| HSL | hsl(280, 38%, 34%) |
| OKLCH | oklch(41.9% 0.117 313.4) |
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 #633679 | 8.99:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #633679 | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #633679 text on white | 8.99:1 | AAA | Lc 90.3 | Preferred for body text |
| #633679 text on black | 2.33:1 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EFE6F3
oklch(93.6% 0.02 315.7)
-
Step 200
200
#E2D2EB
oklch(88.4% 0.038 313.6)
-
Step 300
300
#D0B4E0
oklch(80.8% 0.068 313.2)
-
Step 400
400
#B98CD1
oklch(70.7% 0.109 313.4)
-
Step 500
500
#A76EC4
oklch(63.1% 0.138 313.5)
-
Step 600
600
#9254B1
oklch(55.6% 0.151 313.3)
-
Step 700
700
#7C4498
oklch(49.1% 0.14 313.2)
-
Step 800
800 (this color)
#633679
oklch(41.9% 0.117 313.4)
-
Step 900
900
#523163
oklch(37.6% 0.091 313.2)
-
Step 950
950
#301D3A
oklch(26.9% 0.058 313.2)
#633679 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) | #25477B | 0.102 |
| Deuteranopia (no green cones) | #344A77 | 0.090 |
| Tritanopia (no blue cones) | #614152 | 0.079 |
| Achromatopsia (no color) | #494949 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633679
#633679
oklch(41.9% 0.117 313.4)
- #315904
#315904
oklch(41.8% 0.116 133.3)
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 #633679, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.058
- Blueberry #464196 ΔE 0.072
- Twilight #4E518B ΔE 0.076
- Dusk #4E5481 ΔE 0.083
- Purple #800080 ΔE 0.086
- Light Eggplant #894585 ΔE 0.087
- Grape Purple #5D1451 ΔE 0.091
Use #633679 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.