#642E97
Closest named color: Rebecca Purple (#663399). oklch(43% 0.164 303.7), rgb(100, 46, 151).
Aa
White text reads best on this color (8.82:1).
About this color
#642E97 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.164 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.011 away. White text reads best on it, at 8.82:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.37:1 |
| White text | 8.82:1 |
Values
| HEX | #642E97 |
| RGB | rgb(100, 46, 151) |
| HSL | hsl(271, 53%, 39%) |
| OKLCH | oklch(43% 0.164 303.7) |
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 #642E97 | 8.82:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #642E97 | 2.37:1 | Fails | Lc 14.4 | Not readable |
| #642E97 text on white | 8.82:1 | AAA | Lc 89.5 | Fine for body text |
| #642E97 text on black | 2.37:1 | Fails | Lc -12.7 | 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
#F7F3FD
oklch(97% 0.014 304.1)
-
Step 100
100
#EEE6FA
oklch(93.7% 0.028 303.9)
-
Step 200
200
#E0D1F7
oklch(88.5% 0.054 303.2)
-
Step 300
300
#CEB2F4
oklch(81% 0.096 303.7)
-
Step 400
400
#B586EE
oklch(70.7% 0.154 303.6)
-
Step 500
500
#A463E8
oklch(63.1% 0.196 303.8)
-
Step 600
600
#8F44D6
oklch(55.5% 0.214 303.6)
-
Step 700
700
#7A34BA
oklch(49.1% 0.199 303.6)
-
Step 800
800 (this color)
#642E97
oklch(43% 0.164 303.7)
-
Step 900
900
#512A78
oklch(37.7% 0.129 303.8)
-
Step 950
950
#2F1A46
oklch(27% 0.081 303.5)
#642E97 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) | #00499A | 0.126 |
| Deuteranopia (no green cones) | #004A95 | 0.127 |
| Tritanopia (no blue cones) | #5A465F | 0.119 |
| Achromatopsia (no color) | #4A4A4A | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642E97
#642E97
oklch(43% 0.164 303.7)
- #445900
#445900
oklch(43.1% 0.107 123.9)
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 #642E97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.011
- Dark Slate Blue #483D8B ΔE 0.061
- Blueberry #464196 ΔE 0.064
- Chrysanthemum #560BAD ΔE 0.066
- Grape #7209B7 ΔE 0.066
- Purple #800080 ΔE 0.082
- Imperial Purple #480CA8 ΔE 0.082
- Bluey Purple #6241C7 ΔE 0.085
Use #642E97 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.