#633CB3
Closest named color: Bluey Purple (#6241C7). oklch(47% 0.179 293.4), rgb(99, 60, 179).
Aa
White text reads best on this color (7.42:1).
About this color
#633CB3 is a medium-dark, vivid purple. In OKLCH its lightness is 47%, its chroma 0.179 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.033 away. White text reads best on it, at 7.42:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.179) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 2.82:1 |
| White text | 7.42:1 |
Values
| HEX | #633CB3 |
| RGB | rgb(99, 60, 179) |
| HSL | hsl(260, 50%, 47%) |
| OKLCH | oklch(47% 0.179 293.4) |
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 #633CB3 | 7.42:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #633CB3 | 2.82:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #633CB3 text on white | 7.42:1 | AAA | Lc 85.3 | Fine for body text |
| #633CB3 text on black | 2.82:1 | Fails | Lc -16.8 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7FA
oklch(93.6% 0.026 293.1)
-
Step 200
200
#DAD4F7
oklch(88.6% 0.048 293.3)
-
Step 300
300
#C3B6F4
oklch(80.9% 0.087 294)
-
Step 400
400
#A58EEE
oklch(70.6% 0.139 293.6)
-
Step 500
500
#906FE9
oklch(63.1% 0.177 293.1)
-
Step 600
600
#7C53D7
oklch(55.6% 0.193 293.4)
-
Step 700
700 (this color)
#633CB3
oklch(47% 0.179 293.4)
-
Step 800
800
#553897
oklch(42.7% 0.148 293.1)
-
Step 900
900
#463278
oklch(37.8% 0.115 293.3)
-
Step 950
950
#291E46
oklch(27.1% 0.072 293.7)
#633CB3 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) | #0057B7 | 0.109 |
| Deuteranopia (no green cones) | #0053B1 | 0.108 |
| Tritanopia (no blue cones) | #4C5972 | 0.142 |
| Achromatopsia (no color) | #555555 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633CB3
#633CB3
oklch(47% 0.179 293.4)
- #5B6000
#5B6000
oklch(46.9% 0.105 113.3)
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 #633CB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.033
- Blue With A Hint Of Purple #533CC6 ΔE 0.042
- Rebecca Purple #663399 ΔE 0.046
- Blurple #5539CC ΔE 0.048
- Purple Blue #5D21D0 ΔE 0.062
- Grape #7209B7 ΔE 0.066
- Iris #6258C4 ΔE 0.066
- Blueberry #464196 ΔE 0.068
Use #633CB3 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.