#306CE3
Closest named color: Royal Blue (#4169E1). oklch(56.1% 0.192 262.1), rgb(48, 108, 227).
Aa
White text reads best on this color (4.79:1).
About this color
#306CE3 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.192 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.015 away. White text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.37:1 |
| White text | 4.79:1 |
Values
| HEX | #306CE3 |
| RGB | rgb(48, 108, 227) |
| HSL | hsl(220, 76%, 54%) |
| OKLCH | oklch(56.1% 0.192 262.1) |
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 #306CE3 | 4.79:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #306CE3 | 4.37:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #306CE3 text on white | 4.79:1 | AA | Lc 72.7 | Content text, not long reading |
| #306CE3 text on black | 4.37:1 | AA large text | Lc -29.0 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A2C1F9
oklch(80.8% 0.087 262)
-
Step 400
400
#709FF6
oklch(70.7% 0.138 261.9)
-
Step 500
500
#4B84F3
oklch(63.1% 0.177 262.1)
-
Step 600
600 (this color)
#306CE3
oklch(56.1% 0.192 262.1)
-
Step 700
700
#2258C4
oklch(49.2% 0.179 262.1)
-
Step 800
800
#1D499E
oklch(42.8% 0.147 261.8)
-
Step 900
900
#1D3E7E
oklch(37.8% 0.115 262)
-
Step 950
950
#12254A
oklch(27.1% 0.073 262.2)
#306CE3 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) | #0F7BE7 | 0.038 |
| Deuteranopia (no green cones) | #006AE1 | 0.022 |
| Tritanopia (no blue cones) | #00899D | 0.149 |
| Achromatopsia (no color) | #727272 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306CE3
#306CE3
oklch(56.1% 0.192 262.1)
- #966D00
#966D00
oklch(56.1% 0.116 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 #306CE3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.015
- Cerulean Blue #056EEE ΔE 0.023
- Neon Blue #4361EE ΔE 0.033
- Azul #1D5DEC ΔE 0.043
- Bright Blue #0165FC ΔE 0.047
- Clear Blue #247AFD ΔE 0.050
- Warm Blue #4B57DB ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.067
Use #306CE3 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.