#4D66F7
Closest named color: Neon Blue (#4361EE). oklch(57.7% 0.217 270.6), rgb(77, 102, 247).
Aa
White text reads best on this color (4.60:1).
About this color
#4D66F7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.217 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.022 away. White text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.217) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.55:1 |
| White text | 4.60:1 |
Values
| HEX | #4D66F7 |
| RGB | rgb(77, 102, 247) |
| HSL | hsl(231, 91%, 64%) |
| OKLCH | oklch(57.7% 0.217 270.6) |
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 #4D66F7 | 4.60:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #4D66F7 | 4.55:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #4D66F7 text on white | 4.60:1 | AA | Lc 71.5 | Content text, not long reading |
| #4D66F7 text on black | 4.55:1 | AA | Lc -30.2 | Non-text elements, placeholder text |
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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CBD8FE
oklch(88.5% 0.054 270.4)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500
#5E7BFF
oklch(63.1% 0.198 270.4)
-
Step 600
600 (this color)
#4D66F7
oklch(57.7% 0.217 270.6)
-
Step 700
700
#3A4DD1
oklch(49.1% 0.203 270.5)
-
Step 800
800
#3040A9
oklch(42.7% 0.168 270.8)
-
Step 900
900
#293885
oklch(37.6% 0.13 270.6)
-
Step 950
950
#18224E
oklch(27.1% 0.082 270.4)
#4D66F7 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) | #007DFC | 0.061 |
| Deuteranopia (no green cones) | #006DF4 | 0.045 |
| Tritanopia (no blue cones) | #008AA5 | 0.175 |
| Achromatopsia (no color) | #757575 | 0.218 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D66F7
#4D66F7
oklch(57.7% 0.217 270.6)
- #947500
#947500
oklch(57.6% 0.118 90.2)
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 #4D66F7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.022
- Royal Blue #4169E1 ΔE 0.037
- Cerulean Blue #056EEE ΔE 0.047
- Bright Blue #0165FC ΔE 0.047
- Clear Blue #247AFD ΔE 0.051
- Azul #1D5DEC ΔE 0.053
- Warm Blue #4B57DB ΔE 0.054
- Cornflower #6A79F7 ΔE 0.061
Use #4D66F7 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.