#305C9E
Closest named color: Denim Blue (#3B5B92). oklch(47.8% 0.118 258.4), rgb(48, 92, 158).
Aa
White text reads best on this color (6.66:1).
About this color
#305C9E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.118 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.021 away. White text reads best on it, at 6.66:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.15:1 |
| White text | 6.66:1 |
Values
| HEX | #305C9E |
| RGB | rgb(48, 92, 158) |
| HSL | hsl(216, 53%, 40%) |
| OKLCH | oklch(47.8% 0.118 258.4) |
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 #305C9E | 6.66:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #305C9E | 3.15:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #305C9E text on white | 6.66:1 | AA | Lc 82.7 | Fine for body text |
| #305C9E text on black | 3.15:1 | AA large text | Lc -19.3 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
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
#ABC2E6
oklch(80.9% 0.057 259.3)
-
Step 400
400
#7DA2D9
oklch(70.6% 0.091 258.1)
-
Step 500
500
#5C8ACF
oklch(63.1% 0.116 258.3)
-
Step 600
600
#4273BC
oklch(55.6% 0.126 258.2)
-
Step 700
700 (this color)
#305C9E
oklch(47.8% 0.118 258.4)
-
Step 800
800
#2B4F83
oklch(42.8% 0.096 257.7)
-
Step 900
900
#274269
oklch(37.7% 0.075 257.6)
-
Step 950
950
#17273E
oklch(27.1% 0.048 257.5)
#305C9E 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) | #3D62A1 | 0.024 |
| Deuteranopia (no green cones) | #2C589D | 0.013 |
| Tritanopia (no blue cones) | #006B75 | 0.094 |
| Achromatopsia (no color) | #5C5C5C | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305C9E
#305C9E
oklch(47.8% 0.118 258.4)
- #7B5500
#7B5500
oklch(47.8% 0.099 78.7)
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 #305C9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.021
- Dusky Blue #475F94 ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.036
- Dusk Blue #26538D ΔE 0.038
- Denim #3B638C ΔE 0.041
- Peacock Blue #016795 ΔE 0.042
- Mid Blue #276AB3 ΔE 0.047
- Twilight #4E518B ΔE 0.049
Use #305C9E 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.