#634A9D
Closest named color: Twilight (#4E518B). oklch(47.6% 0.13 294.9), rgb(99, 74, 157).
Aa
White text reads best on this color (7.00:1).
About this color
#634A9D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.130 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.049 away. White text reads best on it, at 7.00:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #634A9D |
| RGB | rgb(99, 74, 157) |
| HSL | hsl(258, 36%, 45%) |
| OKLCH | oklch(47.6% 0.13 294.9) |
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 #634A9D | 7.00:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #634A9D | 2.99:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #634A9D text on white | 7.00:1 | AAA | Lc 84.0 | Fine for body text |
| #634A9D text on black | 2.99:1 | Fails | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#DAD5EE
oklch(88.5% 0.034 294.9)
-
Step 300
300
#C3B9E6
oklch(80.9% 0.064 295.1)
-
Step 400
400
#A594D9
oklch(70.7% 0.101 295)
-
Step 500
500
#8F78CF
oklch(63.1% 0.129 294.6)
-
Step 600
600
#7A5FBC
oklch(55.5% 0.141 294.8)
-
Step 700
700 (this color)
#634A9D
oklch(47.6% 0.13 294.9)
-
Step 800
800
#544183
oklch(42.8% 0.107 294.7)
-
Step 900
900
#453769
oklch(37.6% 0.084 294.9)
-
Step 950
950
#28213E
oklch(27.1% 0.053 293.6)
#634A9D 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) | #295AA0 | 0.082 |
| Deuteranopia (no green cones) | #2F589B | 0.077 |
| Tritanopia (no blue cones) | #555B6C | 0.105 |
| Achromatopsia (no color) | #595959 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634A9D
#634A9D
oklch(47.6% 0.13 294.9)
- #5B6300
#5B6300
oklch(47.6% 0.108 115.1)
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 #634A9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.049
- Rebecca Purple #663399 ΔE 0.052
- Blueberry #464196 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.065
- Dusk #4E5481 ΔE 0.066
- Iris #6258C4 ΔE 0.067
- Dusky Blue #475F94 ΔE 0.070
- Bluey Purple #6241C7 ΔE 0.071
Use #634A9D 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.