#2C66D8
Closest named color: Royal Blue (#4169E1). oklch(53.9% 0.186 262), rgb(44, 102, 216).
Aa
White text reads best on this color (5.25:1).
About this color
#2C66D8 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.186 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.025 away. White text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #2C66D8 |
| RGB | rgb(44, 102, 216) |
| HSL | hsl(220, 69%, 51%) |
| OKLCH | oklch(53.9% 0.186 262) |
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 #2C66D8 | 5.25:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #2C66D8 | 3.99:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #2C66D8 text on white | 5.25:1 | AA | Lc 75.5 | Fine for body text |
| #2C66D8 text on black | 3.99:1 | AA large text | Lc -26.2 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAF9
oklch(88.5% 0.047 262.5)
-
Step 300
300
#A3C1F7
oklch(80.8% 0.084 262)
-
Step 400
400
#729FF4
oklch(70.7% 0.134 262.3)
-
Step 500
500
#4D85EF
oklch(63.1% 0.17 261.8)
-
Step 600
600 (this color)
#2C66D8
oklch(53.9% 0.186 262)
-
Step 700
700
#2459C1
oklch(49.2% 0.173 262)
-
Step 800
800
#1F499C
oklch(42.7% 0.144 262.1)
-
Step 900
900
#1E3E7C
oklch(37.7% 0.112 262)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#2C66D8 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) | #0A74DC | 0.035 |
| Deuteranopia (no green cones) | #0065D6 | 0.019 |
| Tritanopia (no blue cones) | #008295 | 0.144 |
| Achromatopsia (no color) | #6C6C6C | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C66D8
#2C66D8
oklch(53.9% 0.186 262)
- #8E6700
#8E6700
oklch(53.9% 0.111 82.4)
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 #2C66D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.025
- Cerulean Blue #056EEE ΔE 0.038
- Azul #1D5DEC ΔE 0.040
- Neon Blue #4361EE ΔE 0.041
- Warm Blue #4B57DB ΔE 0.042
- Bright Blue #0165FC ΔE 0.056
- Mid Blue #276AB3 ΔE 0.060
- Dark Periwinkle #665FD1 ΔE 0.065
Use #2C66D8 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.