#5F63E1
Closest named color: Dark Periwinkle (#665FD1). oklch(56.6% 0.188 277.2), rgb(95, 99, 225).
Aa
White text reads best on this color (4.81:1).
About this color
#5F63E1 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.188 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.027 away. White text reads best on it, at 4.81:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.35:1 |
| White text | 4.81:1 |
Values
| HEX | #5F63E1 |
| RGB | rgb(95, 99, 225) |
| HSL | hsl(238, 68%, 63%) |
| OKLCH | oklch(56.6% 0.188 277.2) |
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 #5F63E1 | 4.81:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #5F63E1 | 4.35:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #5F63E1 text on white | 4.81:1 | AA | Lc 73.1 | Content text, not long reading |
| #5F63E1 text on black | 4.35:1 | AA large text | Lc -28.6 | 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 600.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D1D7F9
oklch(88.5% 0.047 277.5)
-
Step 300
300
#B2BCF7
oklch(80.8% 0.084 276.9)
-
Step 400
400
#8C97F4
oklch(70.7% 0.136 277.2)
-
Step 500
500
#727AEF
oklch(63% 0.173 277.3)
-
Step 600
600 (this color)
#5F63E1
oklch(56.6% 0.188 277.2)
-
Step 700
700
#4D4EC0
oklch(49% 0.174 277.4)
-
Step 800
800
#3F419C
oklch(42.8% 0.145 277.4)
-
Step 900
900
#34387C
oklch(37.6% 0.113 276.9)
-
Step 950
950
#1E2148
oklch(26.8% 0.071 277.1)
#5F63E1 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) | #0077E5 | 0.074 |
| Deuteranopia (no green cones) | #006DDE | 0.070 |
| Tritanopia (no blue cones) | #008198 | 0.165 |
| Achromatopsia (no color) | #727272 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F63E1
#5F63E1
oklch(56.6% 0.188 277.2)
- #897500
#897500
oklch(56.4% 0.116 97.2)
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 #5F63E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.027
- Royal Blue #4169E1 ΔE 0.036
- Light Indigo #6D5ACF ΔE 0.037
- Slate Blue #6A5ACD ΔE 0.038
- Neon Blue #4361EE ΔE 0.040
- Warm Blue #4B57DB ΔE 0.042
- Medium Slate Blue #7B68EE ΔE 0.048
- Iris #6258C4 ΔE 0.050
Use #5F63E1 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.