#306A9B
Closest named color: Muted Blue (#3B719F). oklch(50.9% 0.099 246.8), rgb(48, 106, 155).
Aa
White text reads best on this color (5.73:1).
About this color
#306A9B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.099 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.024 away. White text reads best on it, at 5.73:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 3.66:1 |
| White text | 5.73:1 |
Values
| HEX | #306A9B |
| RGB | rgb(48, 106, 155) |
| HSL | hsl(207, 53%, 40%) |
| OKLCH | oklch(50.9% 0.099 246.8) |
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 #306A9B | 5.73:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #306A9B | 3.66:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #306A9B text on white | 5.73:1 | AA | Lc 78.5 | Fine for body text |
| #306A9B text on black | 3.66:1 | AA large text | Lc -23.3 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#A8C4DE
oklch(80.8% 0.048 246.4)
-
Step 400
400
#79A6CE
oklch(70.8% 0.076 246)
-
Step 500
500
#558FC1
oklch(63.1% 0.097 246.1)
-
Step 600
600
#3978AE
oklch(55.6% 0.106 247)
-
Step 700
700 (this color)
#306A9B
oklch(50.9% 0.099 246.8)
-
Step 800
800
#255279
oklch(42.6% 0.082 247.3)
-
Step 900
900
#234462
oklch(37.6% 0.065 247.8)
-
Step 950
950
#152839
oklch(26.9% 0.04 246.9)
#306A9B 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) | #546C9D | 0.040 |
| Deuteranopia (no green cones) | #45619A | 0.031 |
| Tritanopia (no blue cones) | #00767B | 0.075 |
| Achromatopsia (no color) | #666666 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306A9B
#306A9B
oklch(50.9% 0.099 246.8)
- #8B591C
#8B591C
oklch(50.9% 0.099 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 #306A9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.024
- Ocean Blue #03719C ΔE 0.026
- Denim #3B638C ΔE 0.028
- Peacock Blue #016795 ΔE 0.028
- Flat Blue #3C73A8 ΔE 0.034
- French Blue #436BAD ΔE 0.035
- Dusky Blue #475F94 ΔE 0.036
- Sea Blue #047495 ΔE 0.037
Use #306A9B 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.