#306AF3
Closest named color: Cerulean Blue (#056EEE). oklch(56.9% 0.215 263.6), rgb(48, 106, 243).
Aa
White text reads best on this color (4.68:1).
About this color
#306AF3 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.215 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.020 away. White text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.215) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.48:1 |
| White text | 4.68:1 |
Values
| HEX | #306AF3 |
| RGB | rgb(48, 106, 243) |
| HSL | hsl(222, 89%, 57%) |
| OKLCH | oklch(56.9% 0.215 263.6) |
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 #306AF3 | 4.68:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #306AF3 | 4.48:1 | AA large text | Lc 32.2 | Non-text elements, placeholder text |
| #306AF3 text on white | 4.68:1 | AA | Lc 71.9 | Content text, not long reading |
| #306AF3 text on black | 4.48:1 | AA large text | Lc -29.8 | 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4881FF
oklch(63.2% 0.197 263.5)
-
Step 600
600 (this color)
#306AF3
oklch(56.9% 0.215 263.6)
-
Step 700
700
#2053CF
oklch(49% 0.199 263.6)
-
Step 800
800
#1C45A8
oklch(42.7% 0.166 263.7)
-
Step 900
900
#1C3C85
oklch(37.8% 0.129 263.6)
-
Step 950
950
#11244E
oklch(27.1% 0.081 263.6)
#306AF3 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) | #007DF8 | 0.046 |
| Deuteranopia (no green cones) | #006BF0 | 0.020 |
| Tritanopia (no blue cones) | #008CA4 | 0.166 |
| Achromatopsia (no color) | #747474 | 0.215 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306AF3
#306AF3
oklch(56.9% 0.215 263.6)
- #987000
#987000
oklch(57% 0.117 83.7)
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 #306AF3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.020
- Neon Blue #4361EE ΔE 0.024
- Bright Blue #0165FC ΔE 0.028
- Royal Blue #4169E1 ΔE 0.030
- Azul #1D5DEC ΔE 0.037
- Clear Blue #247AFD ΔE 0.040
- Warm Blue #4B57DB ΔE 0.057
- Electric Blue #0652FF ΔE 0.062
Use #306AF3 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.