#306BA4
Closest named color: French Blue (#436BAD). oklch(51.6% 0.109 250.1), rgb(48, 107, 164).
Aa
White text reads best on this color (5.57:1).
About this color
#306BA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.109 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.024 away. White text reads best on it, at 5.57:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #306BA4 |
| RGB | rgb(48, 107, 164) |
| HSL | hsl(209, 55%, 42%) |
| OKLCH | oklch(51.6% 0.109 250.1) |
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 #306BA4 | 5.57:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #306BA4 | 3.76:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #306BA4 text on white | 5.57:1 | AA | Lc 77.6 | Fine for body text |
| #306BA4 text on black | 3.76:1 | AA large text | Lc -24.2 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A7C4E2
oklch(80.9% 0.053 249.4)
-
Step 400
400
#78A5D4
oklch(70.8% 0.085 250.2)
-
Step 500
500
#538EC8
oklch(63.1% 0.108 249.5)
-
Step 600
600
#3677B5
oklch(55.6% 0.117 249.8)
-
Step 700
700 (this color)
#306BA4
oklch(51.6% 0.109 250.1)
-
Step 800
800
#23517E
oklch(42.6% 0.09 250.4)
-
Step 900
900
#224466
oklch(37.8% 0.071 250.2)
-
Step 950
950
#14283B
oklch(27% 0.044 248.6)
#306BA4 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) | #516EA6 | 0.036 |
| Deuteranopia (no green cones) | #4163A3 | 0.025 |
| Tritanopia (no blue cones) | #007880 | 0.082 |
| Achromatopsia (no color) | #686868 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306BA4
#306BA4
oklch(51.6% 0.109 250.1)
- #8F5B07
#8F5B07
oklch(51.7% 0.109 70.3)
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 #306BA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.024
- Muted Blue #3B719F ΔE 0.024
- Mid Blue #276AB3 ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.027
- Ocean Blue #03719C ΔE 0.030
- Peacock Blue #016795 ΔE 0.037
- Denim #3B638C ΔE 0.040
- Dusky Blue #475F94 ΔE 0.041
Use #306BA4 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.