#6633AC
Closest named color: Rebecca Purple (#663399). oklch(45.5% 0.182 298), rgb(102, 51, 172).
Aa
White text reads best on this color (7.97:1).
About this color
#6633AC is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.182 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.031 away. White text reads best on it, at 7.97:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.182) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #6633AC |
| RGB | rgb(102, 51, 172) |
| HSL | hsl(265, 54%, 44%) |
| OKLCH | oklch(45.5% 0.182 298) |
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 #6633AC | 7.97:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #6633AC | 2.63:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #6633AC text on white | 7.97:1 | AAA | Lc 86.9 | Fine for body text |
| #6633AC text on black | 2.63:1 | Fails | Lc -15.2 | 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
#DDD1FC
oklch(88.4% 0.06 297.9)
-
Step 300
300
#C9B2FD
oklch(81% 0.107 298.1)
-
Step 400
400
#AF85FB
oklch(70.6% 0.17 298.4)
-
Step 500
500
#9D61F9
oklch(63.2% 0.217 298.1)
-
Step 600
600
#893FE8
oklch(55.6% 0.237 298.1)
-
Step 700
700
#742FC9
oklch(49% 0.219 298)
-
Step 800
800 (this color)
#6633AC
oklch(45.5% 0.182 298)
-
Step 900
900
#4D2881
oklch(37.7% 0.142 298.3)
-
Step 950
950
#2D194C
oklch(27.1% 0.091 298.2)
#6633AC 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) | #0051B0 | 0.121 |
| Deuteranopia (no green cones) | #004FAA | 0.121 |
| Tritanopia (no blue cones) | #55516C | 0.139 |
| Achromatopsia (no color) | #515151 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6633AC
#6633AC
oklch(45.5% 0.182 298)
- #525E00
#525E00
oklch(45.6% 0.106 118)
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 #6633AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.031
- Bluey Purple #6241C7 ΔE 0.051
- Grape #7209B7 ΔE 0.051
- Blue With A Hint Of Purple #533CC6 ΔE 0.057
- Blurple #5539CC ΔE 0.062
- Chrysanthemum #560BAD ΔE 0.063
- Purple Blue #5D21D0 ΔE 0.065
- Blueberry #464196 ΔE 0.070
Use #6633AC 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.