#3166EC
Closest named color: Neon Blue (#4361EE). oklch(55.6% 0.21 264.2), rgb(49, 102, 236).
Aa
White text reads best on this color (4.95:1).
About this color
#3166EC is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.210 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.018 away. White text reads best on it, at 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.210) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.24:1 |
| White text | 4.95:1 |
Values
| HEX | #3166EC |
| RGB | rgb(49, 102, 236) |
| HSL | hsl(223, 83%, 56%) |
| OKLCH | oklch(55.6% 0.21 264.2) |
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 #3166EC | 4.95:1 | AA | Lc -79.1 | Fine for body text |
| Black text on #3166EC | 4.24:1 | AA large text | Lc 30.4 | Non-text elements, placeholder text |
| #3166EC text on white | 4.95:1 | AA | Lc 73.6 | Content text, not long reading |
| #3166EC text on black | 4.24:1 | AA large text | Lc -28.1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8DAFD
oklch(88.6% 0.052 263.7)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#709DFE
oklch(70.7% 0.151 264.1)
-
Step 500
500
#4C81FD
oklch(63.2% 0.193 264.2)
-
Step 600
600 (this color)
#3166EC
oklch(55.6% 0.21 264.2)
-
Step 700
700
#2453CD
oklch(49% 0.196 264.2)
-
Step 800
800
#1F45A6
oklch(42.7% 0.162 264.3)
-
Step 900
900
#1E3C83
oklch(37.8% 0.125 264.1)
-
Step 950
950
#12244D
oklch(27.1% 0.079 264)
#3166EC 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) | #0079F1 | 0.046 |
| Deuteranopia (no green cones) | #0068E9 | 0.021 |
| Tritanopia (no blue cones) | #00889F | 0.164 |
| Achromatopsia (no color) | #707070 | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3166EC
#3166EC
oklch(55.6% 0.21 264.2)
- #926C00
#926C00
oklch(55.5% 0.114 84.1)
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 #3166EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.018
- Cerulean Blue #056EEE ΔE 0.023
- Royal Blue #4169E1 ΔE 0.024
- Azul #1D5DEC ΔE 0.027
- Bright Blue #0165FC ΔE 0.031
- Warm Blue #4B57DB ΔE 0.046
- Clear Blue #247AFD ΔE 0.052
- Electric Blue #0652FF ΔE 0.059
Use #3166EC 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.