#306BE6
Closest named color: Royal Blue (#4169E1). oklch(56.1% 0.197 262.6), rgb(48, 107, 230).
Aa
White text reads best on this color (4.80:1).
About this color
#306BE6 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.197 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.016 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.197) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.37:1 |
| White text | 4.80:1 |
Values
| HEX | #306BE6 |
| RGB | rgb(48, 107, 230) |
| HSL | hsl(221, 78%, 55%) |
| OKLCH | oklch(56.1% 0.197 262.6) |
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 #306BE6 | 4.80:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #306BE6 | 4.37:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #306BE6 text on white | 4.80:1 | AA | Lc 72.8 | Content text, not long reading |
| #306BE6 text on black | 4.37:1 | AA large text | Lc -28.9 | 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
#A2C1FB
oklch(80.9% 0.089 262.7)
-
Step 400
400
#709FF9
oklch(70.8% 0.142 262.4)
-
Step 500
500
#4B83F5
oklch(63% 0.181 262.7)
-
Step 600
600 (this color)
#306BE6
oklch(56.1% 0.197 262.6)
-
Step 700
700
#2257C6
oklch(49.1% 0.182 262.5)
-
Step 800
800
#1D48A0
oklch(42.7% 0.151 262.4)
-
Step 900
900
#1D3D7F
oklch(37.6% 0.118 262.7)
-
Step 950
950
#12244A
oklch(26.9% 0.075 263.2)
#306BE6 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) | #007BEA | 0.040 |
| Deuteranopia (no green cones) | #006AE4 | 0.021 |
| Tritanopia (no blue cones) | #00899E | 0.153 |
| Achromatopsia (no color) | #727272 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306BE6
#306BE6
oklch(56.1% 0.197 262.6)
- #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 #306BE6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.016
- Cerulean Blue #056EEE ΔE 0.020
- Neon Blue #4361EE ΔE 0.029
- Azul #1D5DEC ΔE 0.039
- Bright Blue #0165FC ΔE 0.042
- Clear Blue #247AFD ΔE 0.048
- Warm Blue #4B57DB ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.068
Use #306BE6 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.