#5F63C4
Closest named color: Dark Periwinkle (#665FD1). oklch(54.5% 0.148 278.5), rgb(95, 99, 196).
Aa
White text reads best on this color (5.16:1).
About this color
#5F63C4 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.148 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.025 away. White text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #5F63C4 |
| RGB | rgb(95, 99, 196) |
| HSL | hsl(238, 46%, 57%) |
| OKLCH | oklch(54.5% 0.148 278.5) |
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 #5F63C4 | 5.16:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #5F63C4 | 4.06:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #5F63C4 text on white | 5.16:1 | AA | Lc 75.3 | Fine for body text |
| #5F63C4 text on black | 4.06:1 | AA large text | Lc -26.4 | 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 600.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D3D7F2
oklch(88.4% 0.037 278.9)
-
Step 300
300
#B6BDEC
oklch(80.9% 0.067 278.2)
-
Step 400
400
#929AE2
oklch(70.8% 0.105 278.5)
-
Step 500
500
#787FDA
oklch(63.1% 0.136 278.4)
-
Step 600
600 (this color)
#5F63C4
oklch(54.5% 0.148 278.5)
-
Step 700
700
#5154AD
oklch(49% 0.139 278.5)
-
Step 800
800
#42468C
oklch(42.8% 0.114 278)
-
Step 900
900
#383B70
oklch(37.7% 0.089 278.7)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#5F63C4 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) | #3571C7 | 0.054 |
| Deuteranopia (no green cones) | #2A69C2 | 0.057 |
| Tritanopia (no blue cones) | #35788A | 0.129 |
| Achromatopsia (no color) | #6D6D6D | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F63C4
#5F63C4
oklch(54.5% 0.148 278.5)
- #817000
#817000
oklch(54.5% 0.113 98.7)
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 #5F63C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.025
- Iris #6258C4 ΔE 0.027
- Slate Blue #6A5ACD ΔE 0.030
- Light Indigo #6D5ACF ΔE 0.034
- Royal Blue #4169E1 ΔE 0.055
- French Blue #436BAD ΔE 0.056
- Warm Blue #4B57DB ΔE 0.057
- Windows Blue #3778BF ΔE 0.067
Use #5F63C4 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.