#642F73
Closest named color: Rebecca Purple (#663399). oklch(40.6% 0.122 318.3), rgb(100, 47, 115).
Aa
White text reads best on this color (9.56:1).
About this color
#642F73 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.122 and its hue 318°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.063 away. White text reads best on it, at 9.56:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.122) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.19:1 |
| White text | 9.56:1 |
Values
| HEX | #642F73 |
| RGB | rgb(100, 47, 115) |
| HSL | hsl(287, 42%, 32%) |
| OKLCH | oklch(40.6% 0.122 318.3) |
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 #642F73 | 9.56:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #642F73 | 2.19:1 | Fails | Lc 12.2 | Not readable |
| #642F73 text on white | 9.56:1 | AAA | Lc 91.7 | Preferred for body text |
| #642F73 text on black | 2.19:1 | Fails | Lc -10.7 | 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
#F8F3FA
oklch(97% 0.011 316.5)
-
Step 100
100
#F0E6F3
oklch(93.7% 0.02 318.4)
-
Step 200
200
#E5D1EA
oklch(88.5% 0.04 319.5)
-
Step 300
300
#D5B2DF
oklch(80.9% 0.073 318.6)
-
Step 400
400
#BF89CF
oklch(70.7% 0.115 318.3)
-
Step 500
500
#AE6AC2
oklch(63.2% 0.146 318.2)
-
Step 600
600
#994FAE
oklch(55.6% 0.159 318.3)
-
Step 700
700
#833F96
oklch(49.1% 0.149 318.4)
-
Step 800
800 (this color)
#642F73
oklch(40.6% 0.122 318.3)
-
Step 900
900
#562F62
oklch(37.7% 0.095 317.8)
-
Step 950
950
#331C39
oklch(27.1% 0.06 319.1)
#642F73 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) | #204275 | 0.114 |
| Deuteranopia (no green cones) | #324771 | 0.101 |
| Tritanopia (no blue cones) | #643A4C | 0.079 |
| Achromatopsia (no color) | #454545 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642F73
#642F73
oklch(40.6% 0.122 318.3)
- #215805
#215805
oklch(40.7% 0.123 138.3)
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 #642F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.069
- Grape Purple #5D1451 ΔE 0.075
- Rich Purple #720058 ΔE 0.076
- Purple #800080 ΔE 0.077
- Velvet #750851 ΔE 0.079
- Blueberry #464196 ΔE 0.085
- Twilight #4E518B ΔE 0.093
Use #642F73 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.