#5B6ACC
Closest named color: Dark Periwinkle (#665FD1). oklch(56.1% 0.151 274), rgb(91, 106, 204).
Aa
White text reads best on this color (4.79:1).
About this color
#5B6ACC is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.151 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.031 away. White text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.37:1 |
| White text | 4.79:1 |
Values
| HEX | #5B6ACC |
| RGB | rgb(91, 106, 204) |
| HSL | hsl(232, 53%, 58%) |
| OKLCH | oklch(56.1% 0.151 274) |
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 #5B6ACC | 4.79:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #5B6ACC | 4.37:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #5B6ACC text on white | 4.79:1 | AA | Lc 73.1 | Content text, not long reading |
| #5B6ACC text on black | 4.37:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B2BEED
oklch(80.8% 0.068 273.6)
-
Step 400
400
#8B9BE4
oklch(70.6% 0.109 273.9)
-
Step 500
500
#7081DD
oklch(63.2% 0.139 273.9)
-
Step 600
600 (this color)
#5B6ACC
oklch(56.1% 0.151 274)
-
Step 700
700
#4A56AF
oklch(49.1% 0.141 274.2)
-
Step 800
800
#3C478E
oklch(42.7% 0.117 273.8)
-
Step 900
900
#333C71
oklch(37.6% 0.091 274)
-
Step 950
950
#1E2442
oklch(27.1% 0.056 273.5)
#5B6ACC 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) | #3B77D0 | 0.043 |
| Deuteranopia (no green cones) | #2C6ECA | 0.047 |
| Tritanopia (no blue cones) | #1D8091 | 0.134 |
| Achromatopsia (no color) | #727272 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B6ACC
#5B6ACC
oklch(56.1% 0.151 274)
- #8B7300
#8B7300
oklch(56.2% 0.115 94.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #5B6ACC
These curated palettes and gradients contain exactly #5B6ACC. Open one to see the full color scheme around it.
Gradients
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.031
- Slate Blue #6A5ACD ΔE 0.042
- Royal Blue #4169E1 ΔE 0.043
- Light Indigo #6D5ACF ΔE 0.045
- Iris #6258C4 ΔE 0.045
- Windows Blue #3778BF ΔE 0.056
- French Blue #436BAD ΔE 0.058
- Warm Blue #4B57DB ΔE 0.060
Use #5B6ACC 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.