#055A9F
Closest named color: Dusk Blue (#26538D). oklch(46.2% 0.132 251.1), rgb(5, 90, 159).
Aa
White text reads best on this color (7.07:1).
About this color
#055A9F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.132 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.034 away. White text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.96:1 |
| White text | 7.07:1 |
Values
| HEX | #055A9F |
| RGB | rgb(5, 90, 159) |
| HSL | hsl(207, 94%, 32%) |
| OKLCH | oklch(46.2% 0.132 251.1) |
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 #055A9F | 7.07:1 | AAA | Lc -88.9 | Fine for body text |
| Black text on #055A9F | 2.96:1 | Fails | Lc 20.1 | Dividers and decoration only |
| #055A9F text on white | 7.07:1 | AAA | Lc 83.9 | Fine for body text |
| #055A9F text on black | 2.96:1 | Fails | Lc -18.1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DBF0
oklch(88.4% 0.036 250.9)
-
Step 300
300
#A3C4E9
oklch(80.9% 0.064 251.5)
-
Step 400
400
#6FA5DE
oklch(70.7% 0.102 250.7)
-
Step 500
500
#468DD5
oklch(63.1% 0.13 250.9)
-
Step 600
600
#2376C3
oklch(55.7% 0.142 250.9)
-
Step 700
700 (this color)
#055A9F
oklch(46.2% 0.132 251.1)
-
Step 800
800
#155188
oklch(42.8% 0.109 250.7)
-
Step 900
900
#19436D
oklch(37.6% 0.086 251.2)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#055A9F 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) | #365FA2 | 0.036 |
| Deuteranopia (no green cones) | #19539E | 0.019 |
| Tritanopia (no blue cones) | #006B74 | 0.098 |
| Achromatopsia (no color) | #585858 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #055A9F
#055A9F
oklch(46.2% 0.132 251.1)
- #7B4D00
#7B4D00
oklch(46.2% 0.1 70.5)
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 #055A9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.042
- Peacock Blue #016795 ΔE 0.045
- Light Navy #155084 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.049
- Cobalt #1E488F ΔE 0.053
- Dusky Blue #475F94 ΔE 0.057
Use #055A9F 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.