#643174
Closest named color: Rebecca Purple (#663399). oklch(41% 0.12 317.5), rgb(100, 49, 116).
Aa
White text reads best on this color (9.40:1).
About this color
#643174 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.120 and its hue 318°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.061 away. White text reads best on it, at 9.40:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.120) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.23:1 |
| White text | 9.40:1 |
Values
| HEX | #643174 |
| RGB | rgb(100, 49, 116) |
| HSL | hsl(286, 41%, 32%) |
| OKLCH | oklch(41% 0.12 317.5) |
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 #643174 | 9.40:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #643174 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #643174 text on white | 9.40:1 | AAA | Lc 91.3 | Preferred for body text |
| #643174 text on black | 2.23:1 | Fails | Lc -11.0 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#F0E6F3
oklch(93.7% 0.02 318.4)
-
Step 200
200
#E4D2EA
oklch(88.6% 0.038 317.7)
-
Step 300
300
#D4B3DF
oklch(80.9% 0.071 317.6)
-
Step 400
400
#BD8ACE
oklch(70.7% 0.111 317.5)
-
Step 500
500
#AC6BC2
oklch(63.1% 0.143 317.2)
-
Step 600
600
#9851AE
oklch(55.7% 0.156 317.7)
-
Step 700
700
#814195
oklch(49.1% 0.144 317.5)
-
Step 800
800 (this color)
#643174
oklch(41% 0.12 317.5)
-
Step 900
900
#552F62
oklch(37.6% 0.095 317)
-
Step 950
950
#321C39
oklch(26.9% 0.06 317.7)
#643174 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) | #224376 | 0.110 |
| Deuteranopia (no green cones) | #334872 | 0.098 |
| Tritanopia (no blue cones) | #643B4D | 0.077 |
| Achromatopsia (no color) | #464646 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643174
#643174
oklch(41% 0.12 317.5)
- #255807
#255807
oklch(40.9% 0.12 137.4)
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 #643174, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.067
- Grape Purple #5D1451 ΔE 0.079
- Purple #800080 ΔE 0.080
- Rich Purple #720058 ΔE 0.080
- Blueberry #464196 ΔE 0.082
- Velvet #750851 ΔE 0.083
- Twilight #4E518B ΔE 0.089
Use #643174 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.