#6537AB
Closest named color: Rebecca Purple (#663399). oklch(45.8% 0.176 297.1), rgb(101, 55, 171).
Aa
White text reads best on this color (7.81:1).
About this color
#6537AB is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.176 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.030 away. White text reads best on it, at 7.81:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #6537AB |
| RGB | rgb(101, 55, 171) |
| HSL | hsl(264, 51%, 44%) |
| OKLCH | oklch(45.8% 0.176 297.1) |
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 #6537AB | 7.81:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #6537AB | 2.68:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #6537AB text on white | 7.81:1 | AAA | Lc 86.5 | Fine for body text |
| #6537AB text on black | 2.68:1 | Fails | Lc -15.6 | 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 800.
-
Step 50
50
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#ECE6FC
oklch(93.6% 0.03 298.3)
-
Step 200
200
#DDD2FB
oklch(88.6% 0.057 297.5)
-
Step 300
300
#C7B3FB
oklch(80.9% 0.102 296.8)
-
Step 400
400
#AD87F9
oklch(70.7% 0.165 297.4)
-
Step 500
500
#9A64F6
oklch(63.2% 0.209 297)
-
Step 600
600
#8644E5
oklch(55.6% 0.228 297)
-
Step 700
700
#7233C7
oklch(49.1% 0.213 297.2)
-
Step 800
800 (this color)
#6537AB
oklch(45.8% 0.176 297.1)
-
Step 900
900
#4B2A80
oklch(37.6% 0.138 296.9)
-
Step 950
950
#2C1A4B
oklch(27% 0.087 297.1)
#6537AB 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) | #0052AF | 0.116 |
| Deuteranopia (no green cones) | #0051A9 | 0.117 |
| Tritanopia (no blue cones) | #54536C | 0.136 |
| Achromatopsia (no color) | #525252 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6537AB
#6537AB
oklch(45.8% 0.176 297.1)
- #545F00
#545F00
oklch(46% 0.106 117.3)
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 #6537AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.030
- Bluey Purple #6241C7 ΔE 0.049
- Blue With A Hint Of Purple #533CC6 ΔE 0.055
- Grape #7209B7 ΔE 0.059
- Blurple #5539CC ΔE 0.061
- Blueberry #464196 ΔE 0.065
- Purple Blue #5D21D0 ΔE 0.069
- Chrysanthemum #560BAD ΔE 0.069
Use #6537AB 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.