#306DD7
Closest named color: Royal Blue (#4169E1). oklch(55.4% 0.175 260.6), rgb(48, 109, 215).
Aa
White text reads best on this color (4.89:1).
About this color
#306DD7 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.175 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.023 away. White text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.29:1 |
| White text | 4.89:1 |
Values
| HEX | #306DD7 |
| RGB | rgb(48, 109, 215) |
| HSL | hsl(218, 68%, 52%) |
| OKLCH | oklch(55.4% 0.175 260.6) |
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 #306DD7 | 4.89:1 | AA | Lc -78.8 | Fine for body text |
| Black text on #306DD7 | 4.29:1 | AA large text | Lc 30.7 | Non-text elements, placeholder text |
| #306DD7 text on white | 4.89:1 | AA | Lc 73.4 | Content text, not long reading |
| #306DD7 text on black | 4.29:1 | AA large text | Lc -28.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A4C2F4
oklch(81% 0.078 260.5)
-
Step 400
400
#72A0EF
oklch(70.6% 0.127 260.7)
-
Step 500
500
#4D86E9
oklch(63% 0.161 260.6)
-
Step 600
600 (this color)
#306DD7
oklch(55.4% 0.175 260.6)
-
Step 700
700
#235BBB
oklch(49.1% 0.163 260.5)
-
Step 800
800
#1F4B97
oklch(42.7% 0.134 260.5)
-
Step 900
900
#1E3F78
oklch(37.6% 0.105 260.5)
-
Step 950
950
#122546
oklch(26.8% 0.067 260.7)
#306DD7 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) | #2D79DB | 0.031 |
| Deuteranopia (no green cones) | #006AD5 | 0.024 |
| Tritanopia (no blue cones) | #008698 | 0.135 |
| Achromatopsia (no color) | #717171 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306DD7
#306DD7
oklch(55.4% 0.175 260.6)
- #956A00
#956A00
oklch(55.4% 0.115 80.5)
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 #306DD7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.023
- Cerulean Blue #056EEE ΔE 0.038
- Neon Blue #4361EE ΔE 0.048
- Windows Blue #3778BF ΔE 0.052
- Azul #1D5DEC ΔE 0.054
- Warm Blue #4B57DB ΔE 0.055
- Mid Blue #276AB3 ΔE 0.057
- Clear Blue #247AFD ΔE 0.063
Use #306DD7 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.