#305B9A
Closest named color: Denim Blue (#3B5B92). oklch(47.3% 0.113 258), rgb(48, 91, 154).
Aa
White text reads best on this color (6.79:1).
About this color
#305B9A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.113 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.017 away. White text reads best on it, at 6.79:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.08:1 |
| White text | 6.79:1 |
Values
| HEX | #305B9A |
| RGB | rgb(48, 91, 154) |
| HSL | hsl(216, 52%, 40%) |
| OKLCH | oklch(47.3% 0.113 258) |
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 #305B9A | 6.79:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #305B9A | 3.08:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #305B9A text on white | 6.79:1 | AA | Lc 83.2 | Fine for body text |
| #305B9A text on black | 3.08:1 | AA large text | Lc -18.7 | 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
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ABC2E4
oklch(80.8% 0.054 258)
-
Step 400
400
#7EA2D7
oklch(70.6% 0.088 257.9)
-
Step 500
500
#5E8ACD
oklch(63.1% 0.113 258.6)
-
Step 600
600
#4373B9
oklch(55.5% 0.121 257.8)
-
Step 700
700 (this color)
#305B9A
oklch(47.3% 0.113 258)
-
Step 800
800
#2C4F81
oklch(42.7% 0.093 257.5)
-
Step 900
900
#284268
oklch(37.7% 0.073 257.8)
-
Step 950
950
#18273D
oklch(27.1% 0.046 257.8)
#305B9A 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) | #3E609C | 0.022 |
| Deuteranopia (no green cones) | #2E5699 | 0.015 |
| Tritanopia (no blue cones) | #006A73 | 0.091 |
| Achromatopsia (no color) | #5B5B5B | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305B9A
#305B9A
oklch(47.3% 0.113 258)
- #7A5300
#7A5300
oklch(47.3% 0.099 77.4)
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 #305B9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.017
- Light Navy Blue #2E5A88 ΔE 0.030
- Dusky Blue #475F94 ΔE 0.031
- Dusk Blue #26538D ΔE 0.032
- Denim #3B638C ΔE 0.039
- Peacock Blue #016795 ΔE 0.042
- Twilight #4E518B ΔE 0.045
- Dusk #4E5481 ΔE 0.051
Use #305B9A 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.