#306DC3
Closest named color: Mid Blue (#276AB3). oklch(54% 0.148 257.6), rgb(48, 109, 195).
Aa
White text reads best on this color (5.12:1).
About this color
#306DC3 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.148 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.027 away. White text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.10:1 |
| White text | 5.12:1 |
Values
| HEX | #306DC3 |
| RGB | rgb(48, 109, 195) |
| HSL | hsl(215, 60%, 48%) |
| OKLCH | oklch(54% 0.148 257.6) |
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 #306DC3 | 5.12:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #306DC3 | 4.10:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #306DC3 text on white | 5.12:1 | AA | Lc 74.9 | Content text, not long reading |
| #306DC3 text on black | 4.10:1 | AA large text | Lc -26.8 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF2
oklch(88.4% 0.037 258.4)
-
Step 300
300
#A6C3EC
oklch(81% 0.066 257)
-
Step 400
400
#76A2E3
oklch(70.7% 0.107 258)
-
Step 500
500
#518ADB
oklch(63.2% 0.137 257.4)
-
Step 600
600 (this color)
#306DC3
oklch(54% 0.148 257.6)
-
Step 700
700
#275FAD
oklch(49.1% 0.138 257.5)
-
Step 800
800
#224E8C
oklch(42.7% 0.114 257.5)
-
Step 900
900
#214170
oklch(37.6% 0.089 258)
-
Step 950
950
#142742
oklch(27.2% 0.056 257.3)
#306DC3 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) | #4275C6 | 0.029 |
| Deuteranopia (no green cones) | #2467C1 | 0.020 |
| Tritanopia (no blue cones) | #00818E | 0.115 |
| Achromatopsia (no color) | #6E6E6E | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306DC3
#306DC3
oklch(54% 0.148 257.6)
- #926500
#926500
oklch(54% 0.113 78.1)
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 #306DC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.027
- Windows Blue #3778BF ΔE 0.034
- French Blue #436BAD ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.050
- Royal Blue #4169E1 ΔE 0.051
- Nice Blue #107AB0 ΔE 0.053
- Muted Blue #3B719F ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.067
Use #306DC3 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.