#642A83
Closest named color: Rebecca Purple (#663399). oklch(41% 0.148 311.6), rgb(100, 42, 131).
Aa
White text reads best on this color (9.54:1).
About this color
#642A83 is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.148 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.040 away. White text reads best on it, at 9.54:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.20:1 |
| White text | 9.54:1 |
Values
| HEX | #642A83 |
| RGB | rgb(100, 42, 131) |
| HSL | hsl(279, 51%, 34%) |
| OKLCH | oklch(41% 0.148 311.6) |
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 #642A83 | 9.54:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #642A83 | 2.20:1 | Fails | Lc 12.5 | Not readable |
| #642A83 text on white | 9.54:1 | AAA | Lc 91.5 | Preferred for body text |
| #642A83 text on black | 2.20:1 | Fails | Lc -10.9 | 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
#F8F3FB
oklch(97% 0.012 313.2)
-
Step 100
100
#EFE5F6
oklch(93.5% 0.025 311.7)
-
Step 200
200
#E4D1F1
oklch(88.6% 0.048 311.7)
-
Step 300
300
#D3B1EA
oklch(80.9% 0.087 311.4)
-
Step 400
400
#BD86DF
oklch(70.7% 0.138 311.6)
-
Step 500
500
#AC64D6
oklch(63.1% 0.177 311.5)
-
Step 600
600
#9747C3
oklch(55.5% 0.192 311.4)
-
Step 700
700
#8138A8
oklch(49.1% 0.178 311.6)
-
Step 800
800 (this color)
#642A83
oklch(41% 0.148 311.6)
-
Step 900
900
#552B6D
oklch(37.6% 0.115 311.5)
-
Step 950
950
#321A40
oklch(27% 0.073 311.6)
#642A83 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) | #004386 | 0.134 |
| Deuteranopia (no green cones) | #214681 | 0.118 |
| Tritanopia (no blue cones) | #603C53 | 0.100 |
| Achromatopsia (no color) | #454545 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642A83
#642A83
oklch(41% 0.148 311.6)
- #325600
#325600
oklch(41% 0.113 131.8)
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 #642A83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.064
- Purple #800080 ΔE 0.068
- Blueberry #464196 ΔE 0.076
- Indigo #4B0082 ΔE 0.082
- Dark Magenta #8B008B ΔE 0.085
- Chrysanthemum #560BAD ΔE 0.087
- Rich Purple #720058 ΔE 0.089
Use #642A83 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.