#633689
Closest named color: Rebecca Purple (#663399). oklch(43% 0.136 306.5), rgb(99, 54, 137).
Aa
White text reads best on this color (8.67:1).
About this color
#633689 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.136 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 0.028 away. White text reads best on it, at 8.67:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.136) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.41:1 |
| White text | 8.67:1 |
Values
| HEX | #633689 |
| RGB | rgb(99, 54, 137) |
| HSL | hsl(273, 43%, 37%) |
| OKLCH | oklch(43% 0.136 306.5) |
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 #633689 | 8.67:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #633689 | 2.41:1 | Fails | Lc 14.6 | Not readable |
| #633689 text on white | 8.67:1 | AAA | Lc 89.4 | Fine for body text |
| #633689 text on black | 2.41:1 | Fails | Lc -12.9 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E0D2F1
oklch(88.5% 0.045 305.9)
-
Step 300
300
#CEB4EA
oklch(81% 0.08 306.6)
-
Step 400
400
#B58BDF
oklch(70.8% 0.127 306.4)
-
Step 500
500
#A36BD6
oklch(63.2% 0.163 306.5)
-
Step 600
600
#8E50C3
oklch(55.7% 0.177 306.4)
-
Step 700
700
#7940A8
oklch(49.2% 0.164 306.6)
-
Step 800
800 (this color)
#633689
oklch(43% 0.136 306.5)
-
Step 900
900
#502F6D
oklch(37.6% 0.107 306.5)
-
Step 950
950
#2F1C40
oklch(27% 0.068 306.8)
#633689 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) | #134A8C | 0.113 |
| Deuteranopia (no green cones) | #274C87 | 0.101 |
| Tritanopia (no blue cones) | #5D465A | 0.098 |
| Achromatopsia (no color) | #4B4B4B | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633689
#633689
oklch(43% 0.136 306.5)
- #405A00
#405A00
oklch(43% 0.11 126.5)
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 #633689, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.028
- Dark Slate Blue #483D8B ΔE 0.050
- Blueberry #464196 ΔE 0.058
- Twilight #4E518B ΔE 0.074
- Purple #800080 ΔE 0.085
- Dusk #4E5481 ΔE 0.086
- Light Eggplant #894585 ΔE 0.087
- Chrysanthemum #560BAD ΔE 0.091
Use #633689 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.