#643EC5
Closest named color: Bluey Purple (#6241C7). oklch(48.8% 0.198 290), rgb(100, 62, 197).
Aa
White text reads best on this color (6.91:1).
About this color
#643EC5 is a medium-dark, vivid purple. In OKLCH its lightness is 49%, its chroma 0.198 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.007 away. White text reads best on it, at 6.91:1.
| Hue family | Purples |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.198) |
| Temperature | cool |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #643EC5 |
| RGB | rgb(100, 62, 197) |
| HSL | hsl(257, 54%, 51%) |
| OKLCH | oklch(48.8% 0.198 290) |
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 #643EC5 | 6.91:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #643EC5 | 3.03:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #643EC5 text on white | 6.91:1 | AA | Lc 83.3 | Fine for body text |
| #643EC5 text on black | 3.03:1 | AA large text | Lc -18.7 | Dividers and decoration only |
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 700.
-
Step 50
50
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FC
oklch(93.6% 0.028 290.2)
-
Step 200
200
#D8D4FB
oklch(88.5% 0.053 290)
-
Step 300
300
#BFB6FB
oklch(80.8% 0.097 290)
-
Step 400
400
#A08EF8
oklch(70.7% 0.152 289.7)
-
Step 500
500
#8B6DF5
oklch(63.1% 0.195 289.8)
-
Step 600
600
#7750E4
oklch(55.6% 0.212 289.8)
-
Step 700
700 (this color)
#643EC5
oklch(48.8% 0.198 290)
-
Step 800
800
#5235A0
oklch(42.7% 0.164 290.1)
-
Step 900
900
#43307F
oklch(37.7% 0.128 290)
-
Step 950
950
#271D4A
oklch(27% 0.08 290.2)
#643EC5 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) | #005CC9 | 0.106 |
| Deuteranopia (no green cones) | #0057C2 | 0.104 |
| Tritanopia (no blue cones) | #43607D | 0.159 |
| Achromatopsia (no color) | #5A5A5A | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643EC5
#643EC5
oklch(48.8% 0.198 290)
- #646400
#646400
oklch(48.7% 0.106 109.8)
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 #643EC5, closest first.
No curated palette has a color within ΔE 0.04 of #643EC5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.007
- Blue With A Hint Of Purple #533CC6 ΔE 0.030
- Blurple #5539CC ΔE 0.031
- Burple #6832E3 ΔE 0.049
- Purple Blue #5D21D0 ΔE 0.049
- Purpley Blue #5F34E7 ΔE 0.056
- Iris #6258C4 ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.063
Use #643EC5 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.