#305597
Closest named color: Dusk Blue (#26538D). oklch(45.7% 0.116 261), rgb(48, 85, 151).
Aa
White text reads best on this color (7.31:1).
About this color
#305597 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.116 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.020 away. White text reads best on it, at 7.31:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.87:1 |
| White text | 7.31:1 |
Values
| HEX | #305597 |
| RGB | rgb(48, 85, 151) |
| HSL | hsl(218, 52%, 39%) |
| OKLCH | oklch(45.7% 0.116 261) |
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 #305597 | 7.31:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #305597 | 2.87:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #305597 text on white | 7.31:1 | AAA | Lc 85.1 | Fine for body text |
| #305597 text on black | 2.87:1 | Fails | Lc -16.9 | 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 800.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A8C2ED
oklch(80.9% 0.067 260.4)
-
Step 400
400
#7AA1E4
oklch(70.7% 0.108 260.9)
-
Step 500
500
#5888DD
oklch(63.2% 0.139 261.1)
-
Step 600
600
#3D70CA
oklch(55.6% 0.15 260.8)
-
Step 700
700
#2F5DAF
oklch(49.1% 0.14 260.9)
-
Step 800
800 (this color)
#305597
oklch(45.7% 0.116 261)
-
Step 900
900
#254071
oklch(37.7% 0.09 261.4)
-
Step 950
950
#162642
oklch(27% 0.057 260.9)
#305597 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) | #365B9A | 0.019 |
| Deuteranopia (no green cones) | #255296 | 0.015 |
| Tritanopia (no blue cones) | #00646E | 0.095 |
| Achromatopsia (no color) | #565656 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305597
#305597
oklch(45.7% 0.116 261)
- #725100
#725100
oklch(45.8% 0.095 81.4)
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 #305597, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.020
- Denim Blue #3B5B92 ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.031
- Twilight #4E518B ΔE 0.041
- Light Navy #155084 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.043
- Cobalt #1E488F ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.048
Use #305597 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.