#5F5BDB
Closest named color: Dark Periwinkle (#665FD1). oklch(54.7% 0.19 279.5), rgb(95, 91, 219).
Aa
White text reads best on this color (5.24:1).
About this color
#5F5BDB is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.190 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.022 away. White text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #5F5BDB |
| RGB | rgb(95, 91, 219) |
| HSL | hsl(242, 64%, 61%) |
| OKLCH | oklch(54.7% 0.19 279.5) |
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 #5F5BDB | 5.24:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #5F5BDB | 4.00:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #5F5BDB text on white | 5.24:1 | AA | Lc 75.6 | Fine for body text |
| #5F5BDB text on black | 4.00:1 | AA large text | Lc -26.1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E9FB
oklch(93.7% 0.024 278.4)
-
Step 200
200
#D2D6F9
oklch(88.4% 0.048 280.2)
-
Step 300
300
#B5BBF8
oklch(80.9% 0.086 279.9)
-
Step 400
400
#9096F4
oklch(70.8% 0.137 279.5)
-
Step 500
500
#7778F0
oklch(63.1% 0.176 279.7)
-
Step 600
600 (this color)
#5F5BDB
oklch(54.7% 0.19 279.5)
-
Step 700
700
#514CC1
oklch(49% 0.177 279.5)
-
Step 800
800
#423F9C
oklch(42.6% 0.147 279.6)
-
Step 900
900
#37377C
oklch(37.7% 0.114 279.4)
-
Step 950
950
#202149
oklch(27.1% 0.073 279.3)
#5F5BDB 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) | #0071DF | 0.079 |
| Deuteranopia (no green cones) | #0067D8 | 0.075 |
| Tritanopia (no blue cones) | #187A92 | 0.165 |
| Achromatopsia (no color) | #6C6C6C | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F5BDB
#5F5BDB
oklch(54.7% 0.19 279.5)
- #817100
#817100
oklch(54.7% 0.113 99.4)
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 #5F5BDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.022
- Slate Blue #6A5ACD ΔE 0.027
- Light Indigo #6D5ACF ΔE 0.028
- Warm Blue #4B57DB ΔE 0.030
- Iris #6258C4 ΔE 0.036
- Neon Blue #4361EE ΔE 0.045
- Royal Blue #4169E1 ΔE 0.045
- Medium Slate Blue #7B68EE ΔE 0.061
Use #5F5BDB 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.