#09558A
Closest named color: Deep Sea Blue (#015482). oklch(43.7% 0.11 246.8), rgb(9, 85, 138).
Aa
White text reads best on this color (7.84:1).
About this color
#09558A is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.110 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.014 away. White text reads best on it, at 7.84:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.67:1 |
| White text | 7.84:1 |
Values
| HEX | #09558A |
| RGB | rgb(9, 85, 138) |
| HSL | hsl(205, 88%, 29%) |
| OKLCH | oklch(43.7% 0.11 246.8) |
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 #09558A | 7.84:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #09558A | 2.67:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #09558A text on white | 7.84:1 | AAA | Lc 86.7 | Fine for body text |
| #09558A text on black | 2.67:1 | Fails | Lc -15.4 | 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 800.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#A0C5E8
oklch(80.9% 0.064 247.2)
-
Step 400
400
#69A6DD
oklch(70.6% 0.103 247)
-
Step 500
500
#3C8FD4
oklch(63.1% 0.131 247)
-
Step 600
600
#0A78C1
oklch(55.6% 0.142 246.7)
-
Step 700
700
#0065A5
oklch(49.2% 0.128 246.7)
-
Step 800
800 (this color)
#09558A
oklch(43.7% 0.11 246.8)
-
Step 900
900
#12446C
oklch(37.6% 0.086 247.3)
-
Step 950
950
#0D283F
oklch(26.9% 0.054 247.3)
#09558A 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) | #3B588C | 0.041 |
| Deuteranopia (no green cones) | #284D89 | 0.027 |
| Tritanopia (no blue cones) | #006269 | 0.077 |
| Achromatopsia (no color) | #525252 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09558A
#09558A
oklch(43.7% 0.11 246.8)
- #744500
#744500
oklch(43.6% 0.096 66.9)
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 #09558A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.014
- Light Navy #155084 ΔE 0.016
- Dusk Blue #26538D ΔE 0.018
- Light Navy Blue #2E5A88 ΔE 0.030
- Cobalt #1E488F ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.046
- Peacock Blue #016795 ΔE 0.054
- Twilight Blue #0A437A ΔE 0.057
Use #09558A 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.