#642689
Closest named color: Rebecca Purple (#663399). oklch(40.9% 0.16 309.8), rgb(100, 38, 137).
Aa
White text reads best on this color (9.63:1).
About this color
#642689 is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.160 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.036 away. White text reads best on it, at 9.63:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.160) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.18:1 |
| White text | 9.63:1 |
Values
| HEX | #642689 |
| RGB | rgb(100, 38, 137) |
| HSL | hsl(278, 57%, 34%) |
| OKLCH | oklch(40.9% 0.16 309.8) |
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 #642689 | 9.63:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #642689 | 2.18:1 | Fails | Lc 12.4 | Not readable |
| #642689 text on white | 9.63:1 | AAA | Lc 91.6 | Preferred for body text |
| #642689 text on black | 2.18:1 | Fails | Lc -10.8 | 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
#F8F3FC
oklch(97.1% 0.013 310.5)
-
Step 100
100
#EFE5F8
oklch(93.5% 0.027 309.2)
-
Step 200
200
#E4D0F3
oklch(88.5% 0.052 310.8)
-
Step 300
300
#D3B0EE
oklch(80.9% 0.093 310)
-
Step 400
400
#BD84E6
oklch(70.7% 0.15 309.8)
-
Step 500
500
#AC61DE
oklch(63.1% 0.19 309.7)
-
Step 600
600
#9843CC
oklch(55.7% 0.207 309.8)
-
Step 700
700
#8133B0
oklch(49.1% 0.192 309.6)
-
Step 800
800 (this color)
#642689
oklch(40.9% 0.16 309.8)
-
Step 900
900
#552972
oklch(37.6% 0.125 309.5)
-
Step 950
950
#321943
oklch(27% 0.079 309.6)
#642689 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) | #00428C | 0.135 |
| Deuteranopia (no green cones) | #134687 | 0.130 |
| Tritanopia (no blue cones) | #5F3C55 | 0.109 |
| Achromatopsia (no color) | #454545 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642689
#642689
oklch(40.9% 0.16 309.8)
- #365500
#365500
oklch(40.9% 0.11 129.7)
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 #642689, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.036
- Purple #800080 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.068
- Chrysanthemum #560BAD ΔE 0.075
- Indigo #4B0082 ΔE 0.077
- Blueberry #464196 ΔE 0.078
- Grape #7209B7 ΔE 0.080
- Dark Magenta #8B008B ΔE 0.083
Use #642689 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.