#634FDF
Closest named color: Warm Blue (#4B57DB). oklch(53.4% 0.209 283), rgb(99, 79, 223).
Aa
White text reads best on this color (5.65:1).
About this color
#634FDF is a medium-dark, vivid purple. In OKLCH its lightness is 53%, its chroma 0.209 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.036 away. White text reads best on it, at 5.65:1.
| Hue family | Purples |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.209) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #634FDF |
| RGB | rgb(99, 79, 223) |
| HSL | hsl(248, 69%, 59%) |
| OKLCH | oklch(53.4% 0.209 283) |
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 #634FDF | 5.65:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #634FDF | 3.71:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #634FDF text on white | 5.65:1 | AA | Lc 77.7 | Fine for body text |
| #634FDF text on black | 3.71:1 | AA large text | Lc -24.1 | 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 600.
-
Step 50
50
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E7E8FC
oklch(93.6% 0.027 283.6)
-
Step 200
200
#D4D5FC
oklch(88.5% 0.053 284.1)
-
Step 300
300
#B8B9FC
oklch(80.9% 0.094 283.4)
-
Step 400
400
#9592FB
oklch(70.8% 0.151 283.1)
-
Step 500
500
#7D73F8
oklch(63.2% 0.192 282.8)
-
Step 600
600 (this color)
#634FDF
oklch(53.4% 0.209 283)
-
Step 700
700
#5845C9
oklch(49.1% 0.195 283.1)
-
Step 800
800
#473AA2
oklch(42.6% 0.161 282.8)
-
Step 900
900
#3B3381
oklch(37.6% 0.127 283.1)
-
Step 950
950
#221F4B
oklch(27% 0.079 282.8)
#634FDF 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) | #006CE4 | 0.093 |
| Deuteranopia (no green cones) | #0062DC | 0.087 |
| Tritanopia (no blue cones) | #257390 | 0.176 |
| Achromatopsia (no color) | #676767 | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634FDF
#634FDF
oklch(53.4% 0.209 283)
- #796F00
#796F00
oklch(53.4% 0.112 103.3)
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 #634FDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.036
- Light Indigo #6D5ACF ΔE 0.040
- Slate Blue #6A5ACD ΔE 0.040
- Dark Periwinkle #665FD1 ΔE 0.043
- Iris #6258C4 ΔE 0.047
- Bluey Purple #6241C7 ΔE 0.047
- Purpley Blue #5F34E7 ΔE 0.049
- Burple #6832E3 ΔE 0.049
Use #634FDF 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.