#306DA9
Closest named color: French Blue (#436BAD). oklch(52.4% 0.114 250.6), rgb(48, 109, 169).
Aa
White text reads best on this color (5.40:1).
About this color
#306DA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.114 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.019 away. White text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #306DA9 |
| RGB | rgb(48, 109, 169) |
| HSL | hsl(210, 56%, 43%) |
| OKLCH | oklch(52.4% 0.114 250.6) |
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 #306DA9 | 5.40:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #306DA9 | 3.88:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #306DA9 text on white | 5.40:1 | AA | Lc 76.7 | Fine for body text |
| #306DA9 text on black | 3.88:1 | AA large text | Lc -25.1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#A9C4E1
oklch(81% 0.051 250.3)
-
Step 400
400
#7AA5D2
oklch(70.8% 0.081 250.1)
-
Step 500
500
#568DC7
oklch(63% 0.106 251)
-
Step 600
600 (this color)
#306DA9
oklch(52.4% 0.114 250.6)
-
Step 700
700
#2C639A
oklch(49% 0.106 250.9)
-
Step 800
800
#25517D
oklch(42.6% 0.088 250.7)
-
Step 900
900
#234465
oklch(37.8% 0.069 250.1)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#306DA9 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) | #5270AC | 0.037 |
| Deuteranopia (no green cones) | #4065A8 | 0.025 |
| Tritanopia (no blue cones) | #007B83 | 0.086 |
| Achromatopsia (no color) | #6A6A6A | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306DA9
#306DA9
oklch(52.4% 0.114 250.6)
- #925D00
#925D00
oklch(52.4% 0.113 71.1)
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 #306DA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.019
- Mid Blue #276AB3 ΔE 0.021
- Flat Blue #3C73A8 ΔE 0.022
- Muted Blue #3B719F ΔE 0.024
- Ocean Blue #03719C ΔE 0.033
- Nice Blue #107AB0 ΔE 0.037
- Dull Blue #49759C ΔE 0.043
- Windows Blue #3778BF ΔE 0.044
Use #306DA9 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.