#306BD6
Closest named color: Royal Blue (#4169E1). oklch(54.9% 0.176 261.1), rgb(48, 107, 214).
Aa
White text reads best on this color (5.00:1).
About this color
#306BD6 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.176 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 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #306BD6 |
| RGB | rgb(48, 107, 214) |
| HSL | hsl(219, 67%, 51%) |
| OKLCH | oklch(54.9% 0.176 261.1) |
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 #306BD6 | 5.00:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #306BD6 | 4.19:1 | AA large text | Lc 30.0 | Dividers and decoration only |
| #306BD6 text on white | 5.00:1 | AA | Lc 74.1 | Content text, not long reading |
| #306BD6 text on black | 4.19:1 | AA large text | Lc -27.6 | 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
#73A0EF
oklch(70.7% 0.126 261.1)
-
Step 500
500
#4E86EA
oklch(63.1% 0.162 261)
-
Step 600
600 (this color)
#306BD6
oklch(54.9% 0.176 261.1)
-
Step 700
700
#255ABC
oklch(49% 0.165 261.3)
-
Step 800
800
#204A98
oklch(42.6% 0.136 261.4)
-
Step 900
900
#1F3F79
oklch(37.7% 0.106 261.2)
-
Step 950
950
#132547
oklch(26.9% 0.068 261.9)
#306BD6 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) | #2877DA | 0.031 |
| Deuteranopia (no green cones) | #0068D4 | 0.024 |
| Tritanopia (no blue cones) | #008596 | 0.138 |
| Achromatopsia (no color) | #6F6F6F | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306BD6
#306BD6
oklch(54.9% 0.176 261.1)
- #936900
#936900
oklch(55% 0.114 81)
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 #306BD6, 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 0.039
- Neon Blue #4361EE ΔE 0.047
- Warm Blue #4B57DB ΔE 0.052
- Azul #1D5DEC ΔE 0.052
- Windows Blue #3778BF ΔE 0.054
- Mid Blue #276AB3 ΔE 0.056
- Bright Blue #0165FC ΔE 0.063
Use #306BD6 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.