#306FA4
Closest named color: Muted Blue (#3B719F). oklch(52.6% 0.106 247), rgb(48, 111, 164).
Aa
White text reads best on this color (5.33:1).
About this color
#306FA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.106 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.015 away. White text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #306FA4 |
| RGB | rgb(48, 111, 164) |
| HSL | hsl(207, 55%, 42%) |
| OKLCH | oklch(52.6% 0.106 247) |
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 #306FA4 | 5.33:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #306FA4 | 3.93:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #306FA4 text on white | 5.33:1 | AA | Lc 76.3 | Fine for body text |
| #306FA4 text on black | 3.93:1 | AA large text | Lc -25.5 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#A9C4DE
oklch(80.9% 0.047 247.4)
-
Step 400
400
#7AA5CE
oklch(70.6% 0.076 247.8)
-
Step 500
500
#568FC1
oklch(63.2% 0.097 246.5)
-
Step 600
600 (this color)
#306FA4
oklch(52.6% 0.106 247)
-
Step 700
700
#2B6595
oklch(49.1% 0.098 246.6)
-
Step 800
800
#255279
oklch(42.6% 0.082 247.3)
-
Step 900
900
#234461
oklch(37.6% 0.063 246.9)
-
Step 950
950
#152839
oklch(26.9% 0.04 246.9)
#306FA4 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) | #5771A6 | 0.042 |
| Deuteranopia (no green cones) | #4766A3 | 0.031 |
| Tritanopia (no blue cones) | #007C82 | 0.079 |
| Achromatopsia (no color) | #6B6B6B | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306FA4
#306FA4
oklch(52.6% 0.106 247)
- #935D19
#935D19
oklch(52.7% 0.106 66.8)
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 #306FA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.015
- Flat Blue #3C73A8 ΔE 0.017
- Ocean Blue #03719C ΔE 0.026
- French Blue #436BAD ΔE 0.026
- Mid Blue #276AB3 ΔE 0.031
- Nice Blue #107AB0 ΔE 0.033
- Dull Blue #49759C ΔE 0.035
- Sea Blue #047495 ΔE 0.037
Use #306FA4 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.