#3660EB
Closest named color: Neon Blue (#4361EE). oklch(54.6% 0.215 266.3), rgb(54, 96, 235).
Aa
White text reads best on this color (5.21:1).
About this color
#3660EB is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.215 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.014 away. White text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.215) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.02:1 |
| White text | 5.21:1 |
Values
| HEX | #3660EB |
| RGB | rgb(54, 96, 235) |
| HSL | hsl(226, 82%, 57%) |
| OKLCH | oklch(54.6% 0.215 266.3) |
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 #3660EB | 5.21:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #3660EB | 4.02:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #3660EB text on white | 5.21:1 | AA | Lc 75.2 | Fine for body text |
| #3660EB text on black | 4.02:1 | AA large text | Lc -26.5 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FE
oklch(88.5% 0.054 266.8)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500
#517EFF
oklch(63% 0.198 266.3)
-
Step 600
600 (this color)
#3660EB
oklch(54.6% 0.215 266.3)
-
Step 700
700
#2C51D0
oklch(49.1% 0.2 266.3)
-
Step 800
800
#2543A8
oklch(42.7% 0.166 266.5)
-
Step 900
900
#213A85
oklch(37.6% 0.13 266.3)
-
Step 950
950
#14234E
oklch(27.1% 0.082 266.5)
#3660EB 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) | #0075F0 | 0.050 |
| Deuteranopia (no green cones) | #0064E8 | 0.026 |
| Tritanopia (no blue cones) | #00839C | 0.168 |
| Achromatopsia (no color) | #6D6D6D | 0.215 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3660EB
#3660EB
oklch(54.6% 0.215 266.3)
- #8D6B00
#8D6B00
oklch(54.7% 0.112 86.6)
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 #3660EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.014
- Azul #1D5DEC ΔE 0.020
- Royal Blue #4169E1 ΔE 0.030
- Bright Blue #0165FC ΔE 0.034
- Cerulean Blue #056EEE ΔE 0.036
- Warm Blue #4B57DB ΔE 0.036
- Electric Blue #0652FF ΔE 0.052
- Clear Blue #247AFD ΔE 0.065
Use #3660EB 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.