#634F89
Closest named color: Twilight (#4E518B). oklch(47.4% 0.094 298.7), rgb(99, 79, 137).
Aa
White text reads best on this color (6.97:1).
About this color
#634F89 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.094 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.034 away. White text reads best on it, at 6.97:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.094) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.01:1 |
| White text | 6.97:1 |
Values
| HEX | #634F89 |
| RGB | rgb(99, 79, 137) |
| HSL | hsl(261, 27%, 42%) |
| OKLCH | oklch(47.4% 0.094 298.7) |
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 #634F89 | 6.97:1 | AA | Lc -89.0 | Fine for body text |
| Black text on #634F89 | 3.01:1 | AA large text | Lc 20.0 | Dividers and decoration only |
| #634F89 text on white | 6.97:1 | AA | Lc 84.1 | Fine for body text |
| #634F89 text on black | 3.01:1 | AA large text | Lc -17.9 | 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
#EBE8F2
oklch(93.6% 0.014 299.8)
-
Step 200
200
#DBD6E8
oklch(88.5% 0.025 298.6)
-
Step 300
300
#C4BBDB
oklch(81% 0.046 298.2)
-
Step 400
400
#A697C8
oklch(70.7% 0.072 298.6)
-
Step 500
500
#917DBA
oklch(63.1% 0.092 298.8)
-
Step 600
600
#7B65A6
oklch(55.5% 0.101 298.7)
-
Step 700
700 (this color)
#634F89
oklch(47.4% 0.094 298.7)
-
Step 800
800
#554574
oklch(42.8% 0.078 298.7)
-
Step 900
900
#463A5D
oklch(37.7% 0.06 299.3)
-
Step 950
950
#292237
oklch(27% 0.039 299.1)
#634F89 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) | #3F598B | 0.057 |
| Deuteranopia (no green cones) | #435988 | 0.053 |
| Tritanopia (no blue cones) | #5C5965 | 0.074 |
| Achromatopsia (no color) | #595959 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634F89
#634F89
oklch(47.4% 0.094 298.7)
- #57631E
#57631E
oklch(47.5% 0.093 118.6)
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 #634F89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.034
- Dusk #4E5481 ΔE 0.039
- Dusty Grape #545775 ΔE 0.050
- Dusky Blue #475F94 ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.062
- Muted Purple #805B87 ΔE 0.064
- YInMn Blue #415A77 ΔE 0.069
- Blueberry #464196 ΔE 0.070
Use #634F89 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.