#63599E
Closest named color: Dusky Blue (#475F94). oklch(50.5% 0.108 288.6), rgb(99, 89, 158).
Aa
White text reads best on this color (6.08:1).
About this color
#63599E is a medium-dark, moderately saturated purple. In OKLCH its lightness is 51%, its chroma 0.108 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.046 away. White text reads best on it, at 6.08:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.45:1 |
| White text | 6.08:1 |
Values
| HEX | #63599E |
| RGB | rgb(99, 89, 158) |
| HSL | hsl(249, 28%, 48%) |
| OKLCH | oklch(50.5% 0.108 288.6) |
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 #63599E | 6.08:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #63599E | 3.45:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #63599E text on white | 6.08:1 | AA | Lc 80.3 | Fine for body text |
| #63599E text on black | 3.45:1 | AA large text | Lc -21.6 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D6EC
oklch(88.4% 0.03 289.9)
-
Step 300
300
#BFBCE1
oklch(81% 0.052 288.9)
-
Step 400
400
#9E98D2
oklch(70.6% 0.084 288.8)
-
Step 500
500
#877EC6
oklch(63% 0.107 288.7)
-
Step 600
600
#7167B2
oklch(55.6% 0.114 288.2)
-
Step 700
700 (this color)
#63599E
oklch(50.5% 0.108 288.6)
-
Step 800
800
#4E467C
oklch(42.8% 0.088 288.9)
-
Step 900
900
#403B64
oklch(37.7% 0.069 288.2)
-
Step 950
950
#26233B
oklch(27.1% 0.044 288.8)
#63599E 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) | #4264A1 | 0.050 |
| Deuteranopia (no green cones) | #42619C | 0.049 |
| Tritanopia (no blue cones) | #546674 | 0.089 |
| Achromatopsia (no color) | #626262 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63599E
#63599E
oklch(50.5% 0.108 288.6)
- #6A6905
#6A6905
oklch(50.5% 0.108 109)
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 #63599E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.046
- Twilight #4E518B ΔE 0.050
- Dusk #4E5481 ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.060
- French Blue #436BAD ΔE 0.060
- Iris #6258C4 ΔE 0.061
- Muted Purple #805B87 ΔE 0.062
- Denim #3B638C ΔE 0.069
Use #63599E 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.