#4D66E2
Closest named color: Royal Blue (#4169E1). oklch(56.1% 0.19 270.5), rgb(77, 102, 226).
Aa
White text reads best on this color (4.86:1).
About this color
#4D66E2 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.190 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.014 away. White text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.31:1 |
| White text | 4.86:1 |
Values
| HEX | #4D66E2 |
| RGB | rgb(77, 102, 226) |
| HSL | hsl(230, 72%, 59%) |
| OKLCH | oklch(56.1% 0.19 270.5) |
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 #4D66E2 | 4.86:1 | AA | Lc -78.8 | Fine for body text |
| Black text on #4D66E2 | 4.31:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #4D66E2 text on white | 4.86:1 | AA | Lc 73.3 | Content text, not long reading |
| #4D66E2 text on black | 4.31:1 | AA large text | Lc -28.4 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBEF9
oklch(80.8% 0.086 270.6)
-
Step 400
400
#809BF6
oklch(70.8% 0.137 270.1)
-
Step 500
500
#637FF2
oklch(63.2% 0.174 270.5)
-
Step 600
600 (this color)
#4D66E2
oklch(56.1% 0.19 270.5)
-
Step 700
700
#3D52C3
oklch(49% 0.177 270.5)
-
Step 800
800
#32449E
oklch(42.7% 0.147 270.4)
-
Step 900
900
#2C3B7D
oklch(37.8% 0.113 270.5)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#4D66E2 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) | #0078E6 | 0.056 |
| Deuteranopia (no green cones) | #006BE0 | 0.047 |
| Tritanopia (no blue cones) | #00849A | 0.157 |
| Achromatopsia (no color) | #717171 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D66E2
#4D66E2
oklch(56.1% 0.19 270.5)
- #8E7100
#8E7100
oklch(56.1% 0.115 90.8)
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 #4D66E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.014
- Neon Blue #4361EE ΔE 0.025
- Warm Blue #4B57DB ΔE 0.037
- Dark Periwinkle #665FD1 ΔE 0.042
- Cerulean Blue #056EEE ΔE 0.047
- Azul #1D5DEC ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.055
Use #4D66E2 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.