#640481
Closest named color: Indigo (#4B0082). oklch(37.7% 0.182 315.3), rgb(100, 4, 129).
Aa
White text reads best on this color (11.19:1).
About this color
#640481 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.182 and its hue 315°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.058 away. White text reads best on it, at 11.19:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.182) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.87:1 |
| White text | 11.19:1 |
Values
| HEX | #640481 |
| RGB | rgb(100, 4, 129) |
| HSL | hsl(286, 94%, 26%) |
| OKLCH | oklch(37.7% 0.182 315.3) |
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 #640481 | 11.19:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #640481 | 1.87:1 | Fails | Lc 9.9 | Not readable |
| #640481 text on white | 11.19:1 | AAA | Lc 94.0 | Preferred for body text |
| #640481 text on black | 1.87:1 | Fails | Lc -8.5 | 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 900.
-
Step 50
50
#FAF2FE
oklch(97.1% 0.018 314.7)
-
Step 100
100
#F4E2FC
oklch(93.5% 0.04 315.6)
-
Step 200
200
#EDCBFC
oklch(88.6% 0.075 315.5)
-
Step 300
300
#E2A5FD
oklch(81% 0.136 315.1)
-
Step 400
400
#D36CFB
oklch(70.7% 0.219 315.5)
-
Step 500
500
#C631F8
oklch(63.1% 0.279 315.4)
-
Step 600
600
#AC00DC
oklch(55.6% 0.273 315.3)
-
Step 700
700
#9100BA
oklch(49% 0.241 315.3)
-
Step 800
800
#78009A
oklch(42.7% 0.21 315.5)
-
Step 900
900 (this color)
#640481
oklch(37.7% 0.182 315.3)
-
Step 950
950
#3B0A4C
oklch(27.1% 0.116 315.3)
#640481 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) | #003684 | 0.157 |
| Deuteranopia (no green cones) | #003D7F | 0.160 |
| Tritanopia (no blue cones) | #612A4A | 0.115 |
| Achromatopsia (no color) | #3B3B3B | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #640481
#640481
oklch(37.7% 0.182 315.3)
- #244E00
#244E00
oklch(37.8% 0.111 135.4)
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 #640481, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.058
- Purple #800080 ΔE 0.062
- Royal Purple #4B006E ΔE 0.064
- Rebecca Purple #663399 ΔE 0.076
- Rich Purple #720058 ΔE 0.080
- Chrysanthemum #560BAD ΔE 0.084
- Grape Purple #5D1451 ΔE 0.085
- Dark Magenta #8B008B ΔE 0.085
Use #640481 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.