#640FB2
Closest named color: Grape (#7209B7). oklch(42.6% 0.219 299.1), rgb(100, 15, 178).
Aa
White text reads best on this color (9.32:1).
About this color
#640FB2 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.219 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape (#7209B7), ΔE 0.030 away. White text reads best on it, at 9.32:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.219) |
| Temperature | in between |
| Nearest name | Grape (#7209B7) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #640FB2 |
| RGB | rgb(100, 15, 178) |
| HSL | hsl(271, 84%, 38%) |
| OKLCH | oklch(42.6% 0.219 299.1) |
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 #640FB2 | 9.32:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #640FB2 | 2.25:1 | Fails | Lc 14.2 | Not readable |
| #640FB2 text on white | 9.32:1 | AAA | Lc 89.8 | Fine for body text |
| #640FB2 text on black | 2.25:1 | Fails | Lc -12.5 | 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
#F7F3FF
oklch(97.1% 0.016 301.2)
-
Step 100
100
#EDE5FF
oklch(93.6% 0.036 299.7)
-
Step 200
200
#DFD0FF
oklch(88.5% 0.066 299.6)
-
Step 300
300
#CAB0FF
oklch(80.8% 0.113 299)
-
Step 400
400
#B183FF
oklch(70.7% 0.179 298.9)
-
Step 500
500
#A05AFF
oklch(63% 0.233 299)
-
Step 600
600
#911CFD
oklch(55.6% 0.285 299.2)
-
Step 700
700
#7B00DC
oklch(49% 0.263 298.9)
-
Step 800
800 (this color)
#640FB2
oklch(42.6% 0.219 299.1)
-
Step 900
900
#511C8D
oklch(37.7% 0.171 299)
-
Step 950
950
#2F1352
oklch(26.9% 0.108 299.3)
#640FB2 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) | #0047B6 | 0.137 |
| Deuteranopia (no green cones) | #0045AF | 0.137 |
| Tritanopia (no blue cones) | #504568 | 0.161 |
| Achromatopsia (no color) | #474747 | 0.221 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640FB2
#640FB2
oklch(42.6% 0.219 299.1)
- #495600
#495600
oklch(42.7% 0.101 119.3)
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 #640FB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape #7209B7 ΔE 0.030
- Chrysanthemum #560BAD ΔE 0.031
- Purple Blue #5D21D0 ΔE 0.057
- Violet Blue #510AC9 ΔE 0.057
- Imperial Purple #480CA8 ΔE 0.060
- Rebecca Purple #663399 ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.076
- Blurple #5539CC ΔE 0.076
Use #640FB2 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.