#6637B8
Closest named color: Bluey Purple (#6241C7). oklch(47% 0.191 294.6), rgb(102, 55, 184).
Aa
White text reads best on this color (7.49:1).
About this color
#6637B8 is a medium-dark, vivid purple. In OKLCH its lightness is 47%, its chroma 0.191 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.031 away. White text reads best on it, at 7.49:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.191) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 2.80:1 |
| White text | 7.49:1 |
Values
| HEX | #6637B8 |
| RGB | rgb(102, 55, 184) |
| HSL | hsl(262, 54%, 47%) |
| OKLCH | oklch(47% 0.191 294.6) |
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 #6637B8 | 7.49:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #6637B8 | 2.80:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #6637B8 text on white | 7.49:1 | AAA | Lc 85.3 | Fine for body text |
| #6637B8 text on black | 2.80:1 | Fails | Lc -16.7 | 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 700.
-
Step 50
50
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#EBE7FA
oklch(93.7% 0.026 295.5)
-
Step 200
200
#DBD3F8
oklch(88.5% 0.051 295.2)
-
Step 300
300
#C4B5F7
oklch(80.9% 0.093 294.7)
-
Step 400
400
#A78CF3
oklch(70.7% 0.148 294.4)
-
Step 500
500
#936BEE
oklch(63% 0.189 294.4)
-
Step 600
600
#7F4EDC
oklch(55.5% 0.206 294.6)
-
Step 700
700 (this color)
#6637B8
oklch(47% 0.191 294.6)
-
Step 800
800
#58349B
oklch(42.7% 0.159 294.8)
-
Step 900
900
#482F7B
oklch(37.7% 0.124 294.9)
-
Step 950
950
#2A1D48
oklch(27.1% 0.077 294.7)
#6637B8 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) | #0056BC | 0.116 |
| Deuteranopia (no green cones) | #0053B5 | 0.116 |
| Tritanopia (no blue cones) | #4F5773 | 0.149 |
| Achromatopsia (no color) | #555555 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6637B8
#6637B8
oklch(47% 0.191 294.6)
- #5A6100
#5A6100
oklch(47% 0.106 114.6)
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 #6637B8, closest first.
No curated palette has a color within ΔE 0.04 of #6637B8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.031
- Blue With A Hint Of Purple #533CC6 ΔE 0.041
- Blurple #5539CC ΔE 0.045
- Rebecca Purple #663399 ΔE 0.050
- Purple Blue #5D21D0 ΔE 0.053
- Grape #7209B7 ΔE 0.056
- Burple #6832E3 ΔE 0.067
- Chrysanthemum #560BAD ΔE 0.072
Use #6637B8 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.