#642B81
Closest named color: Rebecca Purple (#663399). oklch(41% 0.144 312.3), rgb(100, 43, 129).
Aa
White text reads best on this color (9.52:1).
About this color
#642B81 is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.144 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 0.042 away. White text reads best on it, at 9.52:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.20:1 |
| White text | 9.52:1 |
Values
| HEX | #642B81 |
| RGB | rgb(100, 43, 129) |
| HSL | hsl(280, 50%, 34%) |
| OKLCH | oklch(41% 0.144 312.3) |
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 #642B81 | 9.52:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #642B81 | 2.20:1 | Fails | Lc 12.5 | Not readable |
| #642B81 text on white | 9.52:1 | AAA | Lc 91.5 | Preferred for body text |
| #642B81 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
#E4D1F0
oklch(88.6% 0.047 312.5)
-
Step 300
300
#D3B1E8
oklch(80.8% 0.084 312.3)
-
Step 400
400
#BD86DD
oklch(70.6% 0.136 312.3)
-
Step 500
500
#AC65D3
oklch(63.1% 0.172 312.2)
-
Step 600
600
#9749C0
oklch(55.6% 0.186 312.1)
-
Step 700
700
#8139A6
oklch(49.1% 0.174 312.1)
-
Step 800
800 (this color)
#642B81
oklch(41% 0.144 312.3)
-
Step 900
900
#552C6C
oklch(37.7% 0.112 311.8)
-
Step 950
950
#321A3F
oklch(26.9% 0.072 312.5)
#642B81 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) | #004384 | 0.133 |
| Deuteranopia (no green cones) | #24477F | 0.116 |
| Tritanopia (no blue cones) | #613C52 | 0.097 |
| Achromatopsia (no color) | #454545 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #642B81
#642B81
oklch(41% 0.144 312.3)
- #315600
#315600
oklch(40.9% 0.114 132.2)
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 #642B81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.064
- Purple #800080 ΔE 0.069
- Blueberry #464196 ΔE 0.076
- Indigo #4B0082 ΔE 0.084
- Dark Magenta #8B008B ΔE 0.086
- Rich Purple #720058 ΔE 0.087
- Grape Purple #5D1451 ΔE 0.089
Use #642B81 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.