#5D66E7
Closest named color: Royal Blue (#4169E1). oklch(57.4% 0.192 275.5), rgb(93, 102, 231).
Aa
White text reads best on this color (4.64:1).
About this color
#5D66E7 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.192 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.034 away. White text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.51:1 |
| White text | 4.64:1 |
Values
| HEX | #5D66E7 |
| RGB | rgb(93, 102, 231) |
| HSL | hsl(236, 74%, 64%) |
| OKLCH | oklch(57.4% 0.192 275.5) |
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 #5D66E7 | 4.64:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #5D66E7 | 4.51:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #5D66E7 text on white | 4.64:1 | AA | Lc 71.9 | Content text, not long reading |
| #5D66E7 text on black | 4.51:1 | AA | Lc -29.8 | 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
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#D0D7FA
oklch(88.5% 0.049 276.4)
-
Step 300
300
#B0BDF9
oklch(81% 0.086 274.8)
-
Step 400
400
#8998F6
oklch(70.8% 0.138 275.4)
-
Step 500
500
#6E7BF2
oklch(63.1% 0.176 275.5)
-
Step 600
600 (this color)
#5D66E7
oklch(57.4% 0.192 275.5)
-
Step 700
700
#494FC3
oklch(49.2% 0.178 275.5)
-
Step 800
800
#3C419E
oklch(42.7% 0.148 275.8)
-
Step 900
900
#32387D
oklch(37.6% 0.115 275.6)
-
Step 950
950
#1D2249
oklch(27% 0.072 275)
#5D66E7 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) | #007AEB | 0.070 |
| Deuteranopia (no green cones) | #006FE4 | 0.065 |
| Tritanopia (no blue cones) | #00859D | 0.165 |
| Achromatopsia (no color) | #747474 | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5D66E7
#5D66E7
oklch(57.4% 0.192 275.5)
- #8E7700
#8E7700
oklch(57.4% 0.118 95.5)
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 #5D66E7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.034
- Neon Blue #4361EE ΔE 0.037
- Dark Periwinkle #665FD1 ΔE 0.037
- Medium Slate Blue #7B68EE ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.048
- Warm Blue #4B57DB ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.049
- Cornflower #6A79F7 ΔE 0.055
Use #5D66E7 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.