#2C66EF
Closest named color: Neon Blue (#4361EE). oklch(55.7% 0.215 263.6), rgb(44, 102, 239).
Aa
White text reads best on this color (4.93:1).
About this color
#2C66EF is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.215 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.021 away. White text reads best on it, at 4.93:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.215) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.25:1 |
| White text | 4.93:1 |
Values
| HEX | #2C66EF |
| RGB | rgb(44, 102, 239) |
| HSL | hsl(222, 86%, 55%) |
| OKLCH | oklch(55.7% 0.215 263.6) |
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 #2C66EF | 4.93:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #2C66EF | 4.25:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #2C66EF text on white | 4.93:1 | AA | Lc 73.5 | Content text, not long reading |
| #2C66EF text on black | 4.25:1 | AA large text | Lc -28.2 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4881FF
oklch(63.2% 0.197 263.5)
-
Step 600
600 (this color)
#2C66EF
oklch(55.7% 0.215 263.6)
-
Step 700
700
#1F53D0
oklch(49.1% 0.201 263.5)
-
Step 800
800
#1B45A8
oklch(42.7% 0.166 263.5)
-
Step 900
900
#1B3C85
oklch(37.8% 0.129 263.3)
-
Step 950
950
#11244E
oklch(27.1% 0.081 263.6)
#2C66EF 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) | #007AF4 | 0.048 |
| Deuteranopia (no green cones) | #0068EC | 0.018 |
| Tritanopia (no blue cones) | #0089A1 | 0.166 |
| Achromatopsia (no color) | #707070 | 0.216 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C66EF
#2C66EF
oklch(55.7% 0.215 263.6)
- #936C00
#936C00
oklch(55.6% 0.114 83.5)
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 #2C66EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.021
- Cerulean Blue #056EEE ΔE 0.022
- Azul #1D5DEC ΔE 0.025
- Bright Blue #0165FC ΔE 0.025
- Royal Blue #4169E1 ΔE 0.029
- Warm Blue #4B57DB ΔE 0.049
- Clear Blue #247AFD ΔE 0.051
- Electric Blue #0652FF ΔE 0.055
Use #2C66EF 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.