#633C80
Closest named color: Rebecca Purple (#663399). oklch(43.3% 0.115 308.9), rgb(99, 60, 128).
Aa
White text reads best on this color (8.43:1).
About this color
#633C80 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.115 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.048 away. White text reads best on it, at 8.43:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.115) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.48:1 |
| White text | 8.43:1 |
Values
| HEX | #633C80 |
| RGB | rgb(99, 60, 128) |
| HSL | hsl(274, 36%, 37%) |
| OKLCH | oklch(43.3% 0.115 308.9) |
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 #633C80 | 8.43:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #633C80 | 2.48:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #633C80 text on white | 8.43:1 | AAA | Lc 88.8 | Fine for body text |
| #633C80 text on black | 2.48:1 | Fails | Lc -13.4 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EEE7F4
oklch(93.7% 0.019 309.8)
-
Step 200
200
#E0D3EC
oklch(88.5% 0.037 308.8)
-
Step 300
300
#CDB5E2
oklch(80.8% 0.067 309)
-
Step 400
400
#B48ED4
oklch(70.8% 0.108 308.7)
-
Step 500
500
#A270C8
oklch(63.1% 0.138 309.1)
-
Step 600
600
#8D57B5
oklch(55.7% 0.149 308.9)
-
Step 700
700
#77469B
oklch(49% 0.138 308.8)
-
Step 800
800 (this color)
#633C80
oklch(43.3% 0.115 308.9)
-
Step 900
900
#4F3365
oklch(37.7% 0.088 308.6)
-
Step 950
950
#2E1E3B
oklch(26.9% 0.056 308.5)
#633C80 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) | #294B82 | 0.092 |
| Deuteranopia (no green cones) | #354E7E | 0.084 |
| Tritanopia (no blue cones) | #5F4858 | 0.082 |
| Achromatopsia (no color) | #4D4D4D | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633C80
#633C80
oklch(43.3% 0.115 308.9)
- #3D5C00
#3D5C00
oklch(43.4% 0.115 128.7)
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 #633C80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.062
- Twilight #4E518B ΔE 0.062
- Dusk #4E5481 ΔE 0.070
- Light Eggplant #894585 ΔE 0.079
- Dusty Grape #545775 ΔE 0.083
- Purple #800080 ΔE 0.094
Use #633C80 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.