#6337A1
Closest named color: Rebecca Purple (#663399). oklch(44.8% 0.164 298.7), rgb(99, 55, 161).
Aa
White text reads best on this color (8.10:1).
About this color
#6337A1 is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.164 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.016 away. White text reads best on it, at 8.10:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.164) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.59:1 |
| White text | 8.10:1 |
Values
| HEX | #6337A1 |
| RGB | rgb(99, 55, 161) |
| HSL | hsl(265, 49%, 42%) |
| OKLCH | oklch(44.8% 0.164 298.7) |
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 #6337A1 | 8.10:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #6337A1 | 2.59:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #6337A1 text on white | 8.10:1 | AAA | Lc 87.5 | Fine for body text |
| #6337A1 text on black | 2.59:1 | Fails | Lc -14.6 | 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
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#ECE6FA
oklch(93.6% 0.027 299.5)
-
Step 200
200
#DDD2F8
oklch(88.5% 0.053 298.5)
-
Step 300
300
#C8B3F6
oklch(80.8% 0.096 298.6)
-
Step 400
400
#AE89F2
oklch(70.7% 0.153 298.7)
-
Step 500
500
#9B67ED
oklch(63.1% 0.195 298.6)
-
Step 600
600
#8749DC
oklch(55.7% 0.213 298.6)
-
Step 700
700
#7339BE
oklch(49.2% 0.197 298.9)
-
Step 800
800 (this color)
#6337A1
oklch(44.8% 0.164 298.7)
-
Step 900
900
#4C2C7B
oklch(37.7% 0.129 298.7)
-
Step 950
950
#2C1B48
oklch(27% 0.081 298.2)
#6337A1 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) | #0050A4 | 0.115 |
| Deuteranopia (no green cones) | #004F9F | 0.116 |
| Tritanopia (no blue cones) | #554F67 | 0.124 |
| Achromatopsia (no color) | #505050 | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6337A1
#6337A1
oklch(44.8% 0.164 298.7)
- #4F5C00
#4F5C00
oklch(44.8% 0.105 118.8)
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 #6337A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.016
- Blueberry #464196 ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.060
- Bluey Purple #6241C7 ΔE 0.064
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
- Grape #7209B7 ΔE 0.067
- Chrysanthemum #560BAD ΔE 0.070
- Blurple #5539CC ΔE 0.074
Use #6337A1 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.