#634579
Closest named color: Twilight (#4E518B). oklch(44.6% 0.089 309.7), rgb(99, 69, 121).
Aa
White text reads best on this color (7.90:1).
About this color
#634579 is a dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.089 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.050 away. White text reads best on it, at 7.90:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.089) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #634579 |
| RGB | rgb(99, 69, 121) |
| HSL | hsl(275, 27%, 37%) |
| OKLCH | oklch(44.6% 0.089 309.7) |
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 #634579 | 7.90:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #634579 | 2.65:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #634579 text on white | 7.90:1 | AAA | Lc 87.3 | Fine for body text |
| #634579 text on black | 2.65:1 | Fails | Lc -14.8 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EDE7F2
oklch(93.6% 0.016 310.1)
-
Step 200
200
#DFD4E8
oklch(88.5% 0.03 310.1)
-
Step 300
300
#CBB8DB
oklch(81% 0.053 309.5)
-
Step 400
400
#B092C8
oklch(70.6% 0.084 309.6)
-
Step 500
500
#9D77BA
oklch(63.2% 0.106 309.6)
-
Step 600
600
#885EA6
oklch(55.5% 0.117 309.9)
-
Step 700
700
#734E8E
oklch(49.1% 0.107 309.6)
-
Step 800
800 (this color)
#634579
oklch(44.6% 0.089 309.7)
-
Step 900
900
#4D375D
oklch(37.8% 0.068 310)
-
Step 950
950
#2D2037
oklch(27% 0.045 309.5)
#634579 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) | #3A507B | 0.068 |
| Deuteranopia (no green cones) | #415278 | 0.063 |
| Tritanopia (no blue cones) | #604D59 | 0.064 |
| Achromatopsia (no color) | #515151 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634579
#634579
oklch(44.6% 0.089 309.7)
- #445E24
#445E24
oklch(44.7% 0.09 129.6)
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 #634579, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.050
- Dusk #4E5481 ΔE 0.050
- Dusty Grape #545775 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.064
- Blueberry #464196 ΔE 0.072
- Rebecca Purple #663399 ΔE 0.072
- Light Eggplant #894585 ΔE 0.074
- YInMn Blue #415A77 ΔE 0.077
Use #634579 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.