#09558F
Closest named color: Dusk Blue (#26538D). oklch(44% 0.116 248.9), rgb(9, 85, 143).
Aa
White text reads best on this color (7.75:1).
About this color
#09558F is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.116 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.016 away. White text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #09558F |
| RGB | rgb(9, 85, 143) |
| HSL | hsl(206, 88%, 30%) |
| OKLCH | oklch(44% 0.116 248.9) |
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 #09558F | 7.75:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #09558F | 2.70:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #09558F text on white | 7.75:1 | AAA | Lc 86.4 | Fine for body text |
| #09558F text on black | 2.70:1 | Fails | Lc -15.7 | 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 800.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#9FC5EB
oklch(80.9% 0.068 248.7)
-
Step 400
400
#68A6E1
oklch(70.7% 0.108 248.4)
-
Step 500
500
#3A8ED9
oklch(63.1% 0.139 248.9)
-
Step 600
600
#0677C7
oklch(55.7% 0.151 248.8)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800 (this color)
#09558F
oklch(44% 0.116 248.9)
-
Step 900
900
#11446F
oklch(37.7% 0.09 248.7)
-
Step 950
950
#0C2841
oklch(27% 0.058 248.6)
#09558F 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) | #385991 | 0.038 |
| Deuteranopia (no green cones) | #234D8E | 0.025 |
| Tritanopia (no blue cones) | #00636B | 0.083 |
| Achromatopsia (no color) | #525252 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09558F
#09558F
oklch(44% 0.116 248.9)
- #744700
#744700
oklch(44% 0.096 69.1)
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 #09558F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.016
- Light Navy #155084 ΔE 0.021
- Deep Sea Blue #015482 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.032
- Cobalt #1E488F ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.044
- Peacock Blue #016795 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.060
Use #09558F 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.