#642A7B
Closest named color: Rebecca Purple (#663399). oklch(40.4% 0.139 315), rgb(100, 42, 123).
Aa
White text reads best on this color (9.72:1).
About this color
#642A7B is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.139 and its hue 315°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.052 away. White text reads best on it, at 9.72:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.15:1 |
| White text | 9.72:1 |
Values
| HEX | #642A7B |
| RGB | rgb(100, 42, 123) |
| HSL | hsl(283, 49%, 32%) |
| OKLCH | oklch(40.4% 0.139 315) |
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 #642A7B | 9.72:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #642A7B | 2.15:1 | Fails | Lc 12.0 | Not readable |
| #642A7B text on white | 9.72:1 | AAA | Lc 92.0 | Preferred for body text |
| #642A7B text on black | 2.15:1 | Fails | Lc -10.4 | 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
#F8F3FB
oklch(97% 0.012 313.2)
-
Step 100
100
#F0E5F5
oklch(93.5% 0.024 315.5)
-
Step 200
200
#E5D1EE
oklch(88.6% 0.045 315.5)
-
Step 300
300
#D5B1E5
oklch(80.9% 0.082 315.4)
-
Step 400
400
#BF86D8
oklch(70.6% 0.131 315.1)
-
Step 500
500
#AE65CD
oklch(63% 0.166 315)
-
Step 600
600
#9A49BA
oklch(55.6% 0.181 315.2)
-
Step 700
700
#833AA0
oklch(49.1% 0.167 315)
-
Step 800
800 (this color)
#642A7B
oklch(40.4% 0.139 315)
-
Step 900
900
#572C68
oklch(37.7% 0.108 315.5)
-
Step 950
950
#331B3D
oklch(27.1% 0.068 315.2)
#642A7B 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) | #0B417D | 0.131 |
| Deuteranopia (no green cones) | #284679 | 0.114 |
| Tritanopia (no blue cones) | #62394E | 0.092 |
| Achromatopsia (no color) | #444444 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642A7B
#642A7B
oklch(40.4% 0.139 315)
- #295600
#295600
oklch(40.5% 0.119 135.2)
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 #642A7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.068
- Purple #800080 ΔE 0.068
- Rich Purple #720058 ΔE 0.078
- Grape Purple #5D1451 ΔE 0.080
- Blueberry #464196 ΔE 0.082
- Indigo #4B0082 ΔE 0.085
- Velvet #750851 ΔE 0.086
Use #642A7B 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.