#305F91
Closest named color: Denim Blue (#3B5B92). oklch(47.7% 0.096 251.8), rgb(48, 95, 145).
Aa
White text reads best on this color (6.62:1).
About this color
#305F91 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.096 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.015 away. White text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.17:1 |
| White text | 6.62:1 |
Values
| HEX | #305F91 |
| RGB | rgb(48, 95, 145) |
| HSL | hsl(211, 50%, 38%) |
| OKLCH | oklch(47.7% 0.096 251.8) |
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 #305F91 | 6.62:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #305F91 | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #305F91 text on white | 6.62:1 | AA | Lc 82.5 | Fine for body text |
| #305F91 text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ABC3DE
oklch(80.8% 0.046 251.5)
-
Step 400
400
#7FA4CE
oklch(70.7% 0.074 252)
-
Step 500
500
#5D8DC2
oklch(63.1% 0.096 251.8)
-
Step 600
600
#4376AE
oklch(55.6% 0.104 252.1)
-
Step 700
700 (this color)
#305F91
oklch(47.7% 0.096 251.8)
-
Step 800
800
#2C5179
oklch(42.7% 0.079 251.8)
-
Step 900
900
#284362
oklch(37.6% 0.063 252.8)
-
Step 950
950
#182839
oklch(27.1% 0.038 250.8)
#305F91 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) | #496293 | 0.030 |
| Deuteranopia (no green cones) | #3C5890 | 0.022 |
| Tritanopia (no blue cones) | #006B71 | 0.077 |
| Achromatopsia (no color) | #5D5D5D | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305F91
#305F91
oklch(47.7% 0.096 251.8)
- #7E520E
#7E520E
oklch(47.7% 0.097 71.3)
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 #305F91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.015
- Light Navy Blue #2E5A88 ΔE 0.019
- Denim #3B638C ΔE 0.020
- Dusky Blue #475F94 ΔE 0.026
- Peacock Blue #016795 ΔE 0.029
- Dusk Blue #26538D ΔE 0.038
- YInMn Blue #415A77 ΔE 0.043
- Dusk #4E5481 ΔE 0.046
Use #305F91 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.