#5663DD
Closest named color: Royal Blue (#4169E1). oklch(55.7% 0.184 274.2), rgb(86, 99, 221).
Aa
White text reads best on this color (4.97:1).
About this color
#5663DD is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.184 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.026 away. White text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.22:1 |
| White text | 4.97:1 |
Values
| HEX | #5663DD |
| RGB | rgb(86, 99, 221) |
| HSL | hsl(234, 67%, 60%) |
| OKLCH | oklch(55.7% 0.184 274.2) |
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 #5663DD | 4.97:1 | AA | Lc -79.4 | Fine for body text |
| Black text on #5663DD | 4.22:1 | AA large text | Lc 30.1 | Non-text elements, placeholder text |
| #5663DD text on white | 4.97:1 | AA | Lc 74.0 | Content text, not long reading |
| #5663DD text on black | 4.22:1 | AA large text | Lc -27.7 | 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
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#CFD8F8
oklch(88.5% 0.045 273)
-
Step 300
300
#B0BDF7
oklch(80.9% 0.083 274.6)
-
Step 400
400
#8899F3
oklch(70.7% 0.133 274.4)
-
Step 500
500
#6C7DEE
oklch(63.1% 0.169 274.1)
-
Step 600
600 (this color)
#5663DD
oklch(55.7% 0.184 274.2)
-
Step 700
700
#4751C0
oklch(49.2% 0.172 274.3)
-
Step 800
800
#3A439B
oklch(42.7% 0.142 274.3)
-
Step 900
900
#313A7B
oklch(37.8% 0.11 274)
-
Step 950
950
#1C2248
oklch(26.9% 0.07 274)
#5663DD 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) | #0076E1 | 0.065 |
| Deuteranopia (no green cones) | #006ADB | 0.059 |
| Tritanopia (no blue cones) | #008096 | 0.158 |
| Achromatopsia (no color) | #707070 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5663DD
#5663DD
oklch(55.7% 0.184 274.2)
- #897100
#897100
oklch(55.5% 0.114 94.1)
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 #5663DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.026
- Dark Periwinkle #665FD1 ΔE 0.029
- Warm Blue #4B57DB ΔE 0.034
- Neon Blue #4361EE ΔE 0.035
- Slate Blue #6A5ACD ΔE 0.040
- Light Indigo #6D5ACF ΔE 0.041
- Iris #6258C4 ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.061
Use #5663DD 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.