#6333A5
Closest named color: Rebecca Purple (#663399). oklch(44.6% 0.174 298.3), rgb(99, 51, 165).
Aa
White text reads best on this color (8.24:1).
About this color
#6333A5 is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.174 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 0.021 away. White text reads best on it, at 8.24:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.54:1 |
| White text | 8.24:1 |
Values
| HEX | #6333A5 |
| RGB | rgb(99, 51, 165) |
| HSL | hsl(265, 53%, 42%) |
| OKLCH | oklch(44.6% 0.174 298.3) |
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 #6333A5 | 8.24:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #6333A5 | 2.54:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #6333A5 text on white | 8.24:1 | AAA | Lc 87.9 | Fine for body text |
| #6333A5 text on black | 2.54:1 | Fails | Lc -14.3 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#ECE6FB
oklch(93.6% 0.029 298.9)
-
Step 200
200
#DDD2FA
oklch(88.5% 0.056 297.8)
-
Step 300
300
#C9B3FA
oklch(81% 0.101 298.3)
-
Step 400
400
#AE87F7
oklch(70.7% 0.162 298.2)
-
Step 500
500
#9C63F3
oklch(63% 0.208 298.5)
-
Step 600
600
#8844E2
oklch(55.6% 0.225 298.4)
-
Step 700
700
#7434C4
oklch(49.2% 0.209 298.6)
-
Step 800
800 (this color)
#6333A5
oklch(44.6% 0.174 298.3)
-
Step 900
900
#4C2A7E
oklch(37.6% 0.136 298.2)
-
Step 950
950
#2D1A4A
oklch(27.1% 0.086 298.8)
#6333A5 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) | #004FA8 | 0.118 |
| Deuteranopia (no green cones) | #004DA3 | 0.118 |
| Tritanopia (no blue cones) | #534E68 | 0.131 |
| Achromatopsia (no color) | #4F4F4F | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6333A5
#6333A5
oklch(44.6% 0.174 298.3)
- #4F5B00
#4F5B00
oklch(44.5% 0.104 118.2)
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 #6333A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.021
- Grape #7209B7 ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.061
- Blueberry #464196 ΔE 0.061
- Chrysanthemum #560BAD ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.066
- Blurple #5539CC ΔE 0.069
Use #6333A5 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.