#2C66E4
Closest named color: Royal Blue (#4169E1). oklch(54.8% 0.201 262.9), rgb(44, 102, 228).
Aa
White text reads best on this color (5.08:1).
About this color
#2C66E4 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.201 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.021 away. White text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.12:1 |
| White text | 5.08:1 |
Values
| HEX | #2C66E4 |
| RGB | rgb(44, 102, 228) |
| HSL | hsl(221, 77%, 53%) |
| OKLCH | oklch(54.8% 0.201 262.9) |
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 #2C66E4 | 5.08:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #2C66E4 | 4.12:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #2C66E4 text on white | 5.08:1 | AA | Lc 74.5 | Content text, not long reading |
| #2C66E4 text on black | 4.12:1 | AA large text | Lc -27.2 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FC
oklch(80.9% 0.091 263)
-
Step 400
400
#709EFA
oklch(70.7% 0.144 263.1)
-
Step 500
500
#4A83F8
oklch(63.2% 0.185 262.7)
-
Step 600
600 (this color)
#2C66E4
oklch(54.8% 0.201 262.9)
-
Step 700
700
#2256C9
oklch(49.2% 0.188 263)
-
Step 800
800
#1D47A2
oklch(42.7% 0.155 262.9)
-
Step 900
900
#1D3D81
oklch(37.8% 0.121 263)
-
Step 950
950
#11244B
oklch(26.9% 0.077 262.8)
#2C66E4 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) | #0077E8 | 0.042 |
| Deuteranopia (no green cones) | #0066E2 | 0.018 |
| Tritanopia (no blue cones) | #00859B | 0.155 |
| Achromatopsia (no color) | #6E6E6E | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C66E4
#2C66E4
oklch(54.8% 0.201 262.9)
- #916A00
#916A00
oklch(54.9% 0.113 83.1)
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 #2C66E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.021
- Cerulean Blue #056EEE ΔE 0.025
- Neon Blue #4361EE ΔE 0.027
- Azul #1D5DEC ΔE 0.028
- Bright Blue #0165FC ΔE 0.039
- Warm Blue #4B57DB ΔE 0.043
- Clear Blue #247AFD ΔE 0.059
- Electric Blue #0652FF ΔE 0.064
Use #2C66E4 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.