#306A8F
Closest named color: Denim (#3B638C). oklch(50.2% 0.084 239.5), rgb(48, 106, 143).
Aa
White text reads best on this color (5.85:1).
About this color
#306A8F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.084 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.021 away. White text reads best on it, at 5.85:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #306A8F |
| RGB | rgb(48, 106, 143) |
| HSL | hsl(203, 50%, 37%) |
| OKLCH | oklch(50.2% 0.084 239.5) |
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 #306A8F | 5.85:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #306A8F | 3.58:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #306A8F text on white | 5.85:1 | AA | Lc 79.1 | Fine for body text |
| #306A8F text on black | 3.58:1 | AA large text | Lc -22.7 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE7
oklch(88.6% 0.023 237.7)
-
Step 300
300
#A9C5D9
oklch(80.9% 0.041 239.1)
-
Step 400
400
#7BA7C5
oklch(70.8% 0.065 238.7)
-
Step 500
500
#5790B7
oklch(63% 0.084 239.9)
-
Step 600
600
#3B7AA3
oklch(55.6% 0.091 239.8)
-
Step 700
700 (this color)
#306A8F
oklch(50.2% 0.084 239.5)
-
Step 800
800
#265471
oklch(42.7% 0.07 239)
-
Step 900
900
#24455C
oklch(37.6% 0.055 240.8)
-
Step 950
950
#162936
oklch(27.1% 0.035 239.7)
#306A8F 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) | #596A91 | 0.046 |
| Deuteranopia (no green cones) | #4C608E | 0.038 |
| Tritanopia (no blue cones) | #007377 | 0.059 |
| Achromatopsia (no color) | #656565 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306A8F
#306A8F
oklch(50.2% 0.084 239.5)
- #87572F
#87572F
oklch(50.1% 0.084 58.9)
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 #306A8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.021
- Peacock Blue #016795 ΔE 0.028
- Ocean Blue #03719C ΔE 0.029
- Sea Blue #047495 ΔE 0.032
- Muted Blue #3B719F ΔE 0.033
- Dusky Blue #475F94 ΔE 0.040
- Metallic Blue #4F738E ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.046
Use #306A8F 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.