#4A66DF
Closest named color: Royal Blue (#4169E1). oklch(55.7% 0.187 269.6), rgb(74, 102, 223).
Aa
White text reads best on this color (4.93:1).
About this color
#4A66DF is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.187 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.011 away. White text reads best on it, at 4.93:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.25:1 |
| White text | 4.93:1 |
Values
| HEX | #4A66DF |
| RGB | rgb(74, 102, 223) |
| HSL | hsl(229, 70%, 58%) |
| OKLCH | oklch(55.7% 0.187 269.6) |
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 #4A66DF | 4.93:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #4A66DF | 4.25:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #4A66DF text on white | 4.93:1 | AA | Lc 73.7 | Content text, not long reading |
| #4A66DF text on black | 4.25:1 | AA large text | Lc -28.0 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBFF8
oklch(81% 0.084 269.5)
-
Step 400
400
#7F9BF4
oklch(70.6% 0.134 269.5)
-
Step 500
500
#6180F0
oklch(63.2% 0.171 269.4)
-
Step 600
600 (this color)
#4A66DF
oklch(55.7% 0.187 269.6)
-
Step 700
700
#3C54C1
oklch(49.2% 0.172 269.6)
-
Step 800
800
#31459C
oklch(42.6% 0.143 269.6)
-
Step 900
900
#2B3B7C
oklch(37.7% 0.112 269.9)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#4A66DF 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) | #0077E3 | 0.052 |
| Deuteranopia (no green cones) | #006ADD | 0.044 |
| Tritanopia (no blue cones) | #008399 | 0.153 |
| Achromatopsia (no color) | #707070 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4A66DF
#4A66DF
oklch(55.7% 0.187 269.6)
- #8E6F00
#8E6F00
oklch(55.6% 0.114 89.2)
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 #4A66DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.011
- Neon Blue #4361EE ΔE 0.028
- Warm Blue #4B57DB ΔE 0.035
- Dark Periwinkle #665FD1 ΔE 0.042
- Cerulean Blue #056EEE ΔE 0.046
- Azul #1D5DEC ΔE 0.051
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.056
Use #4A66DF 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.