#633D98
Closest named color: Rebecca Purple (#663399). oklch(45.1% 0.144 299.9), rgb(99, 61, 152).
Aa
White text reads best on this color (7.92:1).
About this color
#633D98 is a medium-dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.144 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.022 away. White text reads best on it, at 7.92:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.65:1 |
| White text | 7.92:1 |
Values
| HEX | #633D98 |
| RGB | rgb(99, 61, 152) |
| HSL | hsl(265, 43%, 42%) |
| OKLCH | oklch(45.1% 0.144 299.9) |
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 #633D98 | 7.92:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #633D98 | 2.65:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #633D98 text on white | 7.92:1 | AAA | Lc 87.1 | Fine for body text |
| #633D98 text on black | 2.65:1 | Fails | Lc -15.0 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE7F8
oklch(93.7% 0.023 299.4)
-
Step 200
200
#DDD3F4
oklch(88.5% 0.046 299.3)
-
Step 300
300
#C8B5EF
oklch(80.9% 0.083 299.6)
-
Step 400
400
#AE8CE8
oklch(70.8% 0.135 300)
-
Step 500
500
#9B6CE0
oklch(63.1% 0.172 300.2)
-
Step 600
600
#8651CE
oklch(55.6% 0.186 299.9)
-
Step 700
700
#7240B2
oklch(49.1% 0.174 300.2)
-
Step 800
800 (this color)
#633D98
oklch(45.1% 0.144 299.9)
-
Step 900
900
#4B3073
oklch(37.6% 0.112 299.6)
-
Step 950
950
#2C1D43
oklch(27% 0.07 300)
#633D98 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) | #0C519B | 0.108 |
| Deuteranopia (no green cones) | #205096 | 0.098 |
| Tritanopia (no blue cones) | #585064 | 0.110 |
| Achromatopsia (no color) | #515151 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633D98
#633D98
oklch(45.1% 0.144 299.9)
- #4E5D00
#4E5D00
oklch(45% 0.107 120)
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 #633D98, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.022
- Blueberry #464196 ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.052
- Twilight #4E518B ΔE 0.065
- Bluey Purple #6241C7 ΔE 0.075
- Blue With A Hint Of Purple #533CC6 ΔE 0.080
- Dusk #4E5481 ΔE 0.082
- Grape #7209B7 ΔE 0.085
Use #633D98 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.