#633797
Closest named color: Rebecca Purple (#663399). oklch(44.1% 0.152 301.5), rgb(99, 55, 151).
Aa
White text reads best on this color (8.32:1).
About this color
#633797 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.152 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.010 away. White text reads best on it, at 8.32:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.152) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.52:1 |
| White text | 8.32:1 |
Values
| HEX | #633797 |
| RGB | rgb(99, 55, 151) |
| HSL | hsl(267, 47%, 40%) |
| OKLCH | oklch(44.1% 0.152 301.5) |
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 #633797 | 8.32:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #633797 | 2.52:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #633797 text on white | 8.32:1 | AAA | Lc 88.3 | Fine for body text |
| #633797 text on black | 2.52:1 | Fails | Lc -13.9 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F9
oklch(93.6% 0.026 302.6)
-
Step 200
200
#DFD2F5
oklch(88.5% 0.049 302.3)
-
Step 300
300
#CBB4F1
oklch(81% 0.088 301.7)
-
Step 400
400
#B18AEA
oklch(70.8% 0.141 301.6)
-
Step 500
500
#9E69E3
oklch(63.1% 0.18 301.5)
-
Step 600
600
#8A4CD1
oklch(55.6% 0.197 301.7)
-
Step 700
700
#753CB5
oklch(49.1% 0.183 301.6)
-
Step 800
800 (this color)
#633797
oklch(44.1% 0.152 301.5)
-
Step 900
900
#4E2E75
oklch(37.8% 0.118 301.8)
-
Step 950
950
#2D1C44
oklch(27% 0.073 301.3)
#633797 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) | #004D9A | 0.117 |
| Deuteranopia (no green cones) | #164E95 | 0.110 |
| Tritanopia (no blue cones) | #584C62 | 0.114 |
| Achromatopsia (no color) | #4E4E4E | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633797
#633797
oklch(44.1% 0.152 301.5)
- #4A5B00
#4A5B00
oklch(44.1% 0.106 121.4)
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 #633797, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.010
- Dark Slate Blue #483D8B ΔE 0.053
- Blueberry #464196 ΔE 0.053
- Twilight #4E518B ΔE 0.076
- Grape #7209B7 ΔE 0.077
- Chrysanthemum #560BAD ΔE 0.078
- Bluey Purple #6241C7 ΔE 0.079
- Blue With A Hint Of Purple #533CC6 ΔE 0.082
Use #633797 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.