#633389
Closest named color: Rebecca Purple (#663399). oklch(42.5% 0.141 307.1), rgb(99, 51, 137).
Aa
White text reads best on this color (8.87:1).
About this color
#633389 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.141 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 0.027 away. White text reads best on it, at 8.87:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.141) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.36:1 |
| White text | 8.87:1 |
Values
| HEX | #633389 |
| RGB | rgb(99, 51, 137) |
| HSL | hsl(273, 46%, 37%) |
| OKLCH | oklch(42.5% 0.141 307.1) |
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 #633389 | 8.87:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #633389 | 2.36:1 | Fails | Lc 14.1 | Not readable |
| #633389 text on white | 8.87:1 | AAA | Lc 89.9 | Fine for body text |
| #633389 text on black | 2.36:1 | Fails | Lc -12.4 | 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
#E1D2F1
oklch(88.5% 0.045 307.2)
-
Step 300
300
#CFB3EB
oklch(80.9% 0.083 307.3)
-
Step 400
400
#B689E0
oklch(70.6% 0.132 307.1)
-
Step 500
500
#A569D7
oklch(63.1% 0.168 307.5)
-
Step 600
600
#904DC5
oklch(55.6% 0.184 307.2)
-
Step 700
700
#7A3DAA
oklch(49% 0.171 306.9)
-
Step 800
800 (this color)
#633389
oklch(42.5% 0.141 307.1)
-
Step 900
900
#512E6E
oklch(37.7% 0.11 307.2)
-
Step 950
950
#2F1C40
oklch(27% 0.068 306.8)
#633389 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) | #09488C | 0.120 |
| Deuteranopia (no green cones) | #244A87 | 0.106 |
| Tritanopia (no blue cones) | #5D4459 | 0.100 |
| Achromatopsia (no color) | #4A4A4A | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633389
#633389
oklch(42.5% 0.141 307.1)
- #3E5900
#3E5900
oklch(42.6% 0.11 127.2)
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 #633389, 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 0.052
- Blueberry #464196 ΔE 0.061
- Twilight #4E518B ΔE 0.080
- Purple #800080 ΔE 0.081
- Chrysanthemum #560BAD ΔE 0.087
- Grape #7209B7 ΔE 0.091
- Light Eggplant #894585 ΔE 0.091
Use #633389 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.