#642D97
Closest named color: Rebecca Purple (#663399). oklch(42.8% 0.166 303.9), rgb(100, 45, 151).
Aa
White text reads best on this color (8.88:1).
About this color
#642D97 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.166 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.013 away. White text reads best on it, at 8.88:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.36:1 |
| White text | 8.88:1 |
Values
| HEX | #642D97 |
| RGB | rgb(100, 45, 151) |
| HSL | hsl(271, 54%, 38%) |
| OKLCH | oklch(42.8% 0.166 303.9) |
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 #642D97 | 8.88:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #642D97 | 2.36:1 | Fails | Lc 14.3 | Not readable |
| #642D97 text on white | 8.88:1 | AAA | Lc 89.7 | Fine for body text |
| #642D97 text on black | 2.36:1 | Fails | Lc -12.6 | 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
#F7F3FD
oklch(97% 0.014 304.1)
-
Step 100
100
#EEE6FA
oklch(93.7% 0.028 303.9)
-
Step 200
200
#E0D1F7
oklch(88.5% 0.054 303.2)
-
Step 300
300
#CEB1F4
oklch(80.8% 0.098 304.1)
-
Step 400
400
#B686EE
oklch(70.8% 0.154 304)
-
Step 500
500
#A462E9
oklch(63% 0.199 303.8)
-
Step 600
600
#9044D7
oklch(55.7% 0.215 303.8)
-
Step 700
700
#7B34BA
oklch(49.2% 0.2 304)
-
Step 800
800 (this color)
#642D97
oklch(42.8% 0.166 303.9)
-
Step 900
900
#512A78
oklch(37.7% 0.129 303.8)
-
Step 950
950
#2F1A46
oklch(27% 0.081 303.5)
#642D97 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) | #00499A | 0.127 |
| Deuteranopia (no green cones) | #004A95 | 0.128 |
| Tritanopia (no blue cones) | #5A455E | 0.120 |
| Achromatopsia (no color) | #4A4A4A | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642D97
#642D97
oklch(42.8% 0.166 303.9)
- #445800
#445800
oklch(42.8% 0.106 123.5)
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 #642D97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.013
- Dark Slate Blue #483D8B ΔE 0.062
- Chrysanthemum #560BAD ΔE 0.064
- Grape #7209B7 ΔE 0.065
- Blueberry #464196 ΔE 0.065
- Imperial Purple #480CA8 ΔE 0.081
- Purple #800080 ΔE 0.081
- Bluey Purple #6241C7 ΔE 0.086
Use #642D97 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.