#633189
Closest named color: Rebecca Purple (#663399). oklch(42.2% 0.144 307.5), rgb(99, 49, 137).
Aa
White text reads best on this color (9.00:1).
About this color
#633189 is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.144 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.027 away. White text reads best on it, at 9.00:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #633189 |
| RGB | rgb(99, 49, 137) |
| HSL | hsl(274, 47%, 36%) |
| OKLCH | oklch(42.2% 0.144 307.5) |
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 #633189 | 9.00:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #633189 | 2.33:1 | Fails | Lc 13.8 | Not readable |
| #633189 text on white | 9.00:1 | AAA | Lc 90.2 | Preferred for body text |
| #633189 text on black | 2.33:1 | Fails | Lc -12.1 | 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
#EEE6F7
oklch(93.6% 0.024 307)
-
Step 200
200
#E1D2F2
oklch(88.6% 0.046 306.6)
-
Step 300
300
#CFB3EB
oklch(80.9% 0.083 307.3)
-
Step 400
400
#B789E1
oklch(70.7% 0.133 307.3)
-
Step 500
500
#A668D9
oklch(63.2% 0.172 307.5)
-
Step 600
600
#914CC6
oklch(55.6% 0.187 307.5)
-
Step 700
700
#7B3CAB
oklch(49.1% 0.173 307.3)
-
Step 800
800 (this color)
#633189
oklch(42.2% 0.144 307.5)
-
Step 900
900
#522D6F
oklch(37.7% 0.113 307.7)
-
Step 950
950
#301B41
oklch(27% 0.072 307.8)
#633189 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) | #00478C | 0.125 |
| Deuteranopia (no green cones) | #214987 | 0.110 |
| Tritanopia (no blue cones) | #5D4358 | 0.103 |
| Achromatopsia (no color) | #494949 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633189
#633189
oklch(42.2% 0.144 307.5)
- #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 #633189, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.027
- Dark Slate Blue #483D8B ΔE 0.054
- Blueberry #464196 ΔE 0.063
- Purple #800080 ΔE 0.078
- Twilight #4E518B ΔE 0.084
- Chrysanthemum #560BAD ΔE 0.084
- Grape #7209B7 ΔE 0.089
- Dark Magenta #8B008B ΔE 0.091
Use #633189 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.