#305F8F
Closest named color: Denim Blue (#3B5B92). oklch(47.6% 0.094 250.8), rgb(48, 95, 143).
Aa
White text reads best on this color (6.64:1).
About this color
#305F8F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.094 and its hue 251°. 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 6.64:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.15:1 |
| White text | 6.64:1 |
Values
| HEX | #305F8F |
| RGB | rgb(48, 95, 143) |
| HSL | hsl(210, 50%, 37%) |
| OKLCH | oklch(47.6% 0.094 250.8) |
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 #305F8F | 6.64:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #305F8F | 3.15:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #305F8F text on white | 6.64:1 | AA | Lc 82.6 | Fine for body text |
| #305F8F 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ACC3DE
oklch(80.9% 0.046 252.5)
-
Step 400
400
#7FA4CD
oklch(70.7% 0.073 251.4)
-
Step 500
500
#5E8DC0
oklch(63.1% 0.093 251.4)
-
Step 600
600
#4377AC
oklch(55.7% 0.1 250.5)
-
Step 700
700 (this color)
#305F8F
oklch(47.6% 0.094 250.8)
-
Step 800
800
#2C5178
oklch(42.6% 0.078 251.2)
-
Step 900
900
#284461
oklch(37.8% 0.061 250.5)
-
Step 950
950
#182839
oklch(27.1% 0.038 250.8)
#305F8F 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) | #4A6191 | 0.031 |
| Deuteranopia (no green cones) | #3D588E | 0.023 |
| Tritanopia (no blue cones) | #006A70 | 0.074 |
| Achromatopsia (no color) | #5C5C5C | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305F8F
#305F8F
oklch(47.6% 0.094 250.8)
- #7D5213
#7D5213
oklch(47.5% 0.094 71)
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 #305F8F, 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 0.017
- Denim #3B638C ΔE 0.019
- Dusky Blue #475F94 ΔE 0.027
- Peacock Blue #016795 ΔE 0.029
- Dusk Blue #26538D ΔE 0.038
- YInMn Blue #415A77 ΔE 0.040
- Dusk #4E5481 ΔE 0.045
Use #305F8F 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.