#633786
Closest named color: Rebecca Purple (#663399). oklch(42.9% 0.131 307.5), rgb(99, 55, 134).
Aa
White text reads best on this color (8.67:1).
About this color
#633786 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.131 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 0.033 away. White text reads best on it, at 8.67:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.42:1 |
| White text | 8.67:1 |
Values
| HEX | #633786 |
| RGB | rgb(99, 55, 134) |
| HSL | hsl(273, 42%, 37%) |
| OKLCH | oklch(42.9% 0.131 307.5) |
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 #633786 | 8.67:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #633786 | 2.42:1 | Fails | Lc 14.6 | Not readable |
| #633786 text on white | 8.67:1 | AAA | Lc 89.4 | Fine for body text |
| #633786 text on black | 2.42:1 | Fails | Lc -12.8 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E1D2F0
oklch(88.5% 0.044 307.9)
-
Step 300
300
#CEB4E8
oklch(80.9% 0.077 307.4)
-
Step 400
400
#B58BDC
oklch(70.7% 0.123 307.3)
-
Step 500
500
#A36CD2
oklch(63.1% 0.157 307.4)
-
Step 600
600
#8E51BF
oklch(55.5% 0.171 307.3)
-
Step 700
700
#7941A5
oklch(49.1% 0.159 307.4)
-
Step 800
800 (this color)
#633786
oklch(42.9% 0.131 307.5)
-
Step 900
900
#50306B
oklch(37.7% 0.102 307.2)
-
Step 950
950
#2F1D3F
oklch(27.1% 0.065 307)
#633786 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) | #1A4A89 | 0.108 |
| Deuteranopia (no green cones) | #2B4C84 | 0.097 |
| Tritanopia (no blue cones) | #5E4659 | 0.094 |
| Achromatopsia (no color) | #4B4B4B | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633786
#633786
oklch(42.9% 0.131 307.5)
- #3E5A00
#3E5A00
oklch(42.9% 0.111 127.6)
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 #633786, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.033
- Dark Slate Blue #483D8B ΔE 0.050
- Blueberry #464196 ΔE 0.059
- Twilight #4E518B ΔE 0.072
- Dusk #4E5481 ΔE 0.083
- Light Eggplant #894585 ΔE 0.085
- Purple #800080 ΔE 0.086
- Chrysanthemum #560BAD ΔE 0.097
Use #633786 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.