#5B5CD7
Closest named color: Dark Periwinkle (#665FD1). oklch(54.3% 0.184 278), rgb(91, 92, 215).
Aa
White text reads best on this color (5.30:1).
About this color
#5B5CD7 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.184 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.021 away. White text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 3.95:1 |
| White text | 5.30:1 |
Values
| HEX | #5B5CD7 |
| RGB | rgb(91, 92, 215) |
| HSL | hsl(240, 61%, 60%) |
| OKLCH | oklch(54.3% 0.184 278) |
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 #5B5CD7 | 5.30:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #5B5CD7 | 3.95:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #5B5CD7 text on white | 5.30:1 | AA | Lc 76.0 | Fine for body text |
| #5B5CD7 text on black | 3.95:1 | AA large text | Lc -25.7 | 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
#E6E9FA
oklch(93.7% 0.023 277.9)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B4BCF6
oklch(80.9% 0.082 278.3)
-
Step 400
400
#8E97F2
oklch(70.7% 0.133 278.1)
-
Step 500
500
#747AED
oklch(63% 0.17 278.1)
-
Step 600
600 (this color)
#5B5CD7
oklch(54.3% 0.184 278)
-
Step 700
700
#4E4FBE
oklch(49.1% 0.17 277.7)
-
Step 800
800
#40419A
oklch(42.7% 0.142 278.1)
-
Step 900
900
#36387B
oklch(37.7% 0.111 278.3)
-
Step 950
950
#1F2148
oklch(26.9% 0.071 278.2)
#5B5CD7 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) | #0070DB | 0.074 |
| Deuteranopia (no green cones) | #0066D4 | 0.069 |
| Tritanopia (no blue cones) | #057990 | 0.161 |
| Achromatopsia (no color) | #6B6B6B | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B5CD7
#5B5CD7
oklch(54.3% 0.184 278)
- #816F00
#816F00
oklch(54.2% 0.112 97.9)
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 #5B5CD7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.021
- Slate Blue #6A5ACD ΔE 0.027
- Warm Blue #4B57DB ΔE 0.027
- Light Indigo #6D5ACF ΔE 0.029
- Iris #6258C4 ΔE 0.031
- Royal Blue #4169E1 ΔE 0.041
- Neon Blue #4361EE ΔE 0.045
- Bluey Purple #6241C7 ΔE 0.062
Use #5B5CD7 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.