#3366EC
Closest named color: Neon Blue (#4361EE). oklch(55.7% 0.21 264.6), rgb(51, 102, 236).
Aa
White text reads best on this color (4.93:1).
About this color
#3366EC is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.210 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.017 away. White text reads best on it, at 4.93:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.210) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.25:1 |
| White text | 4.93:1 |
Values
| HEX | #3366EC |
| RGB | rgb(51, 102, 236) |
| HSL | hsl(223, 83%, 56%) |
| OKLCH | oklch(55.7% 0.21 264.6) |
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 #3366EC | 4.93:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #3366EC | 4.25:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #3366EC text on white | 4.93:1 | AA | Lc 73.6 | Content text, not long reading |
| #3366EC text on black | 4.25:1 | 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
#C8D9FD
oklch(88.4% 0.053 265.3)
-
Step 300
300
#A2C0FE
oklch(80.8% 0.094 264.4)
-
Step 400
400
#719DFE
oklch(70.7% 0.15 264.4)
-
Step 500
500
#4D80FC
oklch(63% 0.193 264.6)
-
Step 600
600 (this color)
#3366EC
oklch(55.7% 0.21 264.6)
-
Step 700
700
#2653CD
oklch(49% 0.195 264.6)
-
Step 800
800
#2045A6
oklch(42.7% 0.162 264.5)
-
Step 900
900
#1F3C83
oklch(37.8% 0.125 264.4)
-
Step 950
950
#12244D
oklch(27.1% 0.079 264)
#3366EC 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 | 0.023 |
| Tritanopia (no blue cones) | #00889F | 0.164 |
| Achromatopsia (no color) | #707070 | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3366EC
#3366EC
oklch(55.7% 0.21 264.6)
- #926D00
#926D00
oklch(55.7% 0.114 85)
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 #3366EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.017
- Royal Blue #4169E1 ΔE 0.023
- Cerulean Blue #056EEE ΔE 0.024
- Azul #1D5DEC ΔE 0.028
- Bright Blue #0165FC ΔE 0.032
- Warm Blue #4B57DB ΔE 0.045
- Clear Blue #247AFD ΔE 0.052
- Electric Blue #0652FF ΔE 0.060
Use #3366EC 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.