#0366F6
Closest named color: Bright Blue (#0165FC). oklch(55.6% 0.23 260.4), rgb(3, 102, 246).
Aa
White text reads best on this color (4.95:1).
About this color
#0366F6 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.230 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Blue (#0165FC), ΔE 0.009 away. White text reads best on it, at 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.230) |
| Temperature | cool |
| Nearest name | Bright Blue (#0165FC) |
| Black text | 4.23:1 |
| White text | 4.95:1 |
Values
| HEX | #0366F6 |
| RGB | rgb(3, 102, 246) |
| HSL | hsl(216, 98%, 49%) |
| OKLCH | oklch(55.6% 0.23 260.4) |
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 #0366F6 | 4.95:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #0366F6 | 4.23:1 | AA large text | Lc 30.8 | Non-text elements, placeholder text |
| #0366F6 text on white | 4.95:1 | AA | Lc 73.3 | Content text, not long reading |
| #0366F6 text on black | 4.23:1 | AA large text | Lc -28.4 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3A83FF
oklch(63.1% 0.199 260.3)
-
Step 600
600 (this color)
#0366F6
oklch(55.6% 0.23 260.4)
-
Step 700
700
#0055D2
oklch(49.1% 0.205 260.4)
-
Step 800
800
#0145AD
oklch(42.6% 0.177 260.4)
-
Step 900
900
#0E3C89
oklch(37.7% 0.138 260.5)
-
Step 950
950
#0A2450
oklch(27% 0.087 260.3)
#0366F6 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) | #007AFB | 0.049 |
| Deuteranopia (no green cones) | #0066F3 | 0.005 |
| Tritanopia (no blue cones) | #008BA4 | 0.173 |
| Achromatopsia (no color) | #707070 | 0.230 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0366F6
#0366F6
oklch(55.6% 0.23 260.4)
- #966A00
#966A00
oklch(55.5% 0.115 79.9)
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 #0366F6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Blue #0165FC ΔE 0.009
- Cerulean Blue #056EEE ΔE 0.023
- Azul #1D5DEC ΔE 0.025
- Neon Blue #4361EE ΔE 0.037
- Electric Blue #0652FF ΔE 0.044
- Royal Blue #4169E1 ΔE 0.047
- Clear Blue #247AFD ΔE 0.053
- Warm Blue #4B57DB ΔE 0.064
Use #0366F6 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.