#634F83
Closest named color: Twilight (#4E518B). oklch(47% 0.085 300.9), rgb(99, 79, 131).
Aa
White text reads best on this color (7.05:1).
About this color
#634F83 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.085 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.035 away. White text reads best on it, at 7.05:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.085) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #634F83 |
| RGB | rgb(99, 79, 131) |
| HSL | hsl(263, 25%, 41%) |
| OKLCH | oklch(47% 0.085 300.9) |
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 #634F83 | 7.05:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #634F83 | 2.97:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #634F83 text on white | 7.05:1 | AAA | Lc 84.4 | Fine for body text |
| #634F83 text on black | 2.97:1 | Fails | Lc -17.6 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EBE8F1
oklch(93.6% 0.012 301.3)
-
Step 200
200
#DBD6E6
oklch(88.5% 0.022 300.2)
-
Step 300
300
#C5BBD8
oklch(80.9% 0.042 301.2)
-
Step 400
400
#A798C4
oklch(70.8% 0.065 300.3)
-
Step 500
500
#927EB5
oklch(63.2% 0.084 300.7)
-
Step 600
600
#7C66A0
oklch(55.5% 0.091 300.9)
-
Step 700
700 (this color)
#634F83
oklch(47% 0.085 300.9)
-
Step 800
800
#55466F
oklch(42.7% 0.069 300.3)
-
Step 900
900
#463B5A
oklch(37.7% 0.054 300.1)
-
Step 950
950
#292235
oklch(26.9% 0.036 300.9)
#634F83 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) | #425885 | 0.053 |
| Deuteranopia (no green cones) | #465882 | 0.049 |
| Tritanopia (no blue cones) | #5D5863 | 0.066 |
| Achromatopsia (no color) | #595959 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634F83
#634F83
oklch(47% 0.085 300.9)
- #546227
#546227
oklch(47% 0.085 120.9)
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 #634F83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.035
- Dusk #4E5481 ΔE 0.036
- Dusty Grape #545775 ΔE 0.043
- Dusky Blue #475F94 ΔE 0.058
- Muted Purple #805B87 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.064
- YInMn Blue #415A77 ΔE 0.064
- Dull Purple #84597E ΔE 0.069
Use #634F83 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.