#5B68CE
Closest named color: Dark Periwinkle (#665FD1). oklch(55.9% 0.156 274.7), rgb(91, 104, 206).
Aa
White text reads best on this color (4.86:1).
About this color
#5B68CE is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.156 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.026 away. White text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #5B68CE |
| RGB | rgb(91, 104, 206) |
| HSL | hsl(233, 54%, 58%) |
| OKLCH | oklch(55.9% 0.156 274.7) |
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 #5B68CE | 4.86:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #5B68CE | 4.31:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #5B68CE text on white | 4.86:1 | AA | Lc 73.5 | Content text, not long reading |
| #5B68CE text on black | 4.31:1 | AA large text | Lc -28.2 | 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
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F4
oklch(88.6% 0.039 274.4)
-
Step 300
300
#B3BEEF
oklch(81% 0.07 274.9)
-
Step 400
400
#8C9BE7
oklch(70.8% 0.113 274.6)
-
Step 500
500
#7180DF
oklch(63.1% 0.143 274.8)
-
Step 600
600 (this color)
#5B68CE
oklch(55.9% 0.156 274.7)
-
Step 700
700
#4A55B1
oklch(49% 0.145 274.6)
-
Step 800
800
#3D4690
oklch(42.7% 0.121 274.8)
-
Step 900
900
#343C73
oklch(37.8% 0.094 274.8)
-
Step 950
950
#1E2343
oklch(26.9% 0.06 275)
#5B68CE 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) | #3576D2 | 0.048 |
| Deuteranopia (no green cones) | #236DCC | 0.053 |
| Tritanopia (no blue cones) | #1A7F91 | 0.139 |
| Achromatopsia (no color) | #717171 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B68CE
#5B68CE
oklch(55.9% 0.156 274.7)
- #8A7200
#8A7200
oklch(55.9% 0.115 94.3)
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 #5B68CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.026
- Slate Blue #6A5ACD ΔE 0.038
- Light Indigo #6D5ACF ΔE 0.040
- Royal Blue #4169E1 ΔE 0.040
- Iris #6258C4 ΔE 0.041
- Warm Blue #4B57DB ΔE 0.054
- Neon Blue #4361EE ΔE 0.061
- Windows Blue #3778BF ΔE 0.061
Use #5B68CE 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.