#642C83
Closest named color: Rebecca Purple (#663399). oklch(41.2% 0.145 311.3), rgb(100, 44, 131).
Aa
White text reads best on this color (9.41:1).
About this color
#642C83 is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.145 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.038 away. White text reads best on it, at 9.41:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.22:1 |
| White text | 9.41:1 |
Values
| HEX | #642C83 |
| RGB | rgb(100, 44, 131) |
| HSL | hsl(279, 50%, 34%) |
| OKLCH | oklch(41.2% 0.145 311.3) |
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 #642C83 | 9.41:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #642C83 | 2.22:1 | Fails | Lc 12.8 | Not readable |
| #642C83 text on white | 9.41:1 | AAA | Lc 91.2 | Preferred for body text |
| #642C83 text on black | 2.22:1 | Fails | Lc -11.2 | 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
#EFE6F6
oklch(93.7% 0.023 310.7)
-
Step 200
200
#E3D1F0
oklch(88.5% 0.046 311.2)
-
Step 300
300
#D2B1E9
oklch(80.8% 0.085 311.1)
-
Step 400
400
#BC87DE
oklch(70.8% 0.135 311.3)
-
Step 500
500
#AB65D5
oklch(63.1% 0.174 311.2)
-
Step 600
600
#9649C2
oklch(55.6% 0.188 311.1)
-
Step 700
700
#8039A7
oklch(49% 0.175 311.3)
-
Step 800
800 (this color)
#642C83
oklch(41.2% 0.145 311.3)
-
Step 900
900
#552C6D
oklch(37.8% 0.114 311.3)
-
Step 950
950
#321B40
oklch(27.2% 0.071 311.2)
#642C83 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 | 0.132 |
| Deuteranopia (no green cones) | #234781 | 0.115 |
| Tritanopia (no blue cones) | #603D53 | 0.099 |
| Achromatopsia (no color) | #464646 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642C83
#642C83
oklch(41.2% 0.145 311.3)
- #345700
#345700
oklch(41.4% 0.114 131.2)
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 #642C83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.062
- Purple #800080 ΔE 0.070
- Blueberry #464196 ΔE 0.074
- Indigo #4B0082 ΔE 0.085
- Dark Magenta #8B008B ΔE 0.086
- Chrysanthemum #560BAD ΔE 0.088
- Rich Purple #720058 ΔE 0.090
Use #642C83 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.