#306DA3
Closest named color: Muted Blue (#3B719F). oklch(52% 0.106 248.1), rgb(48, 109, 163).
Aa
White text reads best on this color (5.46:1).
About this color
#306DA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.106 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.018 away. White text reads best on it, at 5.46:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 3.84:1 |
| White text | 5.46:1 |
Values
| HEX | #306DA3 |
| RGB | rgb(48, 109, 163) |
| HSL | hsl(208, 55%, 41%) |
| OKLCH | oklch(52% 0.106 248.1) |
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 #306DA3 | 5.46:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #306DA3 | 3.84:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #306DA3 text on white | 5.46:1 | AA | Lc 77.0 | Fine for body text |
| #306DA3 text on black | 3.84:1 | AA large text | Lc -24.7 | 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
#A7C4E1
oklch(80.8% 0.052 248.5)
-
Step 400
400
#77A5D2
oklch(70.6% 0.083 248.5)
-
Step 500
500
#528EC6
oklch(63% 0.106 248.3)
-
Step 600
600
#3578B3
oklch(55.7% 0.114 248.1)
-
Step 700
700 (this color)
#306DA3
oklch(52% 0.106 248.1)
-
Step 800
800
#22527D
oklch(42.7% 0.088 248.5)
-
Step 900
900
#214464
oklch(37.6% 0.069 248.2)
-
Step 950
950
#14283B
oklch(27% 0.044 248.6)
#306DA3 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) | #556FA5 | 0.040 |
| Deuteranopia (no green cones) | #4564A2 | 0.030 |
| Tritanopia (no blue cones) | #007A80 | 0.080 |
| Achromatopsia (no color) | #696969 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306DA3
#306DA3
oklch(52% 0.106 248.1)
- #915C14
#915C14
oklch(52.2% 0.107 68.1)
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 #306DA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.018
- Flat Blue #3C73A8 ΔE 0.022
- French Blue #436BAD ΔE 0.026
- Ocean Blue #03719C ΔE 0.027
- Mid Blue #276AB3 ΔE 0.029
- Peacock Blue #016795 ΔE 0.038
- Nice Blue #107AB0 ΔE 0.039
- Dull Blue #49759C ΔE 0.039
Use #306DA3 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.