#642FA4
Closest named color: Rebecca Purple (#663399). oklch(44.1% 0.178 299.8), rgb(100, 47, 164).
Aa
White text reads best on this color (8.45:1).
About this color
#642FA4 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.178 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.020 away. White text reads best on it, at 8.45:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.178) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.48:1 |
| White text | 8.45:1 |
Values
| HEX | #642FA4 |
| RGB | rgb(100, 47, 164) |
| HSL | hsl(267, 55%, 41%) |
| OKLCH | oklch(44.1% 0.178 299.8) |
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 #642FA4 | 8.45:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #642FA4 | 2.48:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #642FA4 text on white | 8.45:1 | AAA | Lc 88.4 | Fine for body text |
| #642FA4 text on black | 2.48:1 | Fails | Lc -13.8 | 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
#F7F4FE
oklch(97.2% 0.014 299.8)
-
Step 100
100
#ECE6FC
oklch(93.6% 0.03 298.3)
-
Step 200
200
#DED1FA
oklch(88.4% 0.057 299.7)
-
Step 300
300
#CAB2FA
oklch(80.9% 0.103 299.4)
-
Step 400
400
#B185F8
oklch(70.7% 0.167 299.8)
-
Step 500
500
#9F61F4
oklch(63.1% 0.212 299.7)
-
Step 600
600
#8B40E3
oklch(55.6% 0.231 299.7)
-
Step 700
700
#7630C5
oklch(49% 0.215 299.6)
-
Step 800
800 (this color)
#642FA4
oklch(44.1% 0.178 299.8)
-
Step 900
900
#4E297F
oklch(37.8% 0.139 299.4)
-
Step 950
950
#2E194A
oklch(27% 0.088 300.4)
#642FA4 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) | #004DA7 | 0.122 |
| Deuteranopia (no green cones) | #004CA2 | 0.123 |
| Tritanopia (no blue cones) | #554B66 | 0.132 |
| Achromatopsia (no color) | #4D4D4D | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642FA4
#642FA4
oklch(44.1% 0.178 299.8)
- #4C5A00
#4C5A00
oklch(44% 0.104 119.6)
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 #642FA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.020
- Grape #7209B7 ΔE 0.053
- Chrysanthemum #560BAD ΔE 0.057
- Blueberry #464196 ΔE 0.066
- Bluey Purple #6241C7 ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.069
- Blurple #5539CC ΔE 0.073
Use #642FA4 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.