#63559B
Closest named color: Twilight (#4E518B). oklch(49.6% 0.11 291.1), rgb(99, 85, 155).
Aa
White text reads best on this color (6.35:1).
About this color
#63559B is a medium-dark, moderately saturated purple. In OKLCH its lightness is 50%, its chroma 0.110 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.044 away. White text reads best on it, at 6.35:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.30:1 |
| White text | 6.35:1 |
Values
| HEX | #63559B |
| RGB | rgb(99, 85, 155) |
| HSL | hsl(252, 29%, 47%) |
| OKLCH | oklch(49.6% 0.11 291.1) |
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 #63559B | 6.35:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #63559B | 3.30:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #63559B text on white | 6.35:1 | AA | Lc 81.5 | Fine for body text |
| #63559B text on black | 3.30:1 | AA large text | Lc -20.4 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D9D6EC
oklch(88.5% 0.03 292)
-
Step 300
300
#C0BBE1
oklch(80.9% 0.053 291.2)
-
Step 400
400
#A097D2
oklch(70.6% 0.086 291)
-
Step 500
500
#8A7DC6
oklch(63.1% 0.109 291.1)
-
Step 600
600
#7465B3
oklch(55.6% 0.119 290.9)
-
Step 700
700 (this color)
#63559B
oklch(49.6% 0.11 291.1)
-
Step 800
800
#50457D
oklch(42.8% 0.091 291.1)
-
Step 900
900
#423A64
oklch(37.7% 0.071 291.4)
-
Step 950
950
#27223B
oklch(27% 0.046 292.2)
#63559B 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) | #3E609E | 0.055 |
| Deuteranopia (no green cones) | #3F5E99 | 0.054 |
| Tritanopia (no blue cones) | #556270 | 0.091 |
| Achromatopsia (no color) | #5F5F5F | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63559B
#63559B
oklch(49.6% 0.11 291.1)
- #656700
#656700
oklch(49.5% 0.109 111.1)
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 #63559B, closest first.
No curated palette has a color within ΔE 0.04 of #63559B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.044
- Dusky Blue #475F94 ΔE 0.049
- Dusk #4E5481 ΔE 0.055
- Denim Blue #3B5B92 ΔE 0.060
- Iris #6258C4 ΔE 0.064
- Muted Purple #805B87 ΔE 0.064
- Dusty Grape #545775 ΔE 0.069
- French Blue #436BAD ΔE 0.069
Use #63559B 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.