#055191
Closest named color: Dusk Blue (#26538D). oklch(43.1% 0.124 251.5), rgb(5, 81, 145).
Aa
White text reads best on this color (8.10:1).
About this color
#055191 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.124 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.021 away. White text reads best on it, at 8.10:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.59:1 |
| White text | 8.10:1 |
Values
| HEX | #055191 |
| RGB | rgb(5, 81, 145) |
| HSL | hsl(207, 93%, 29%) |
| OKLCH | oklch(43.1% 0.124 251.5) |
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 #055191 | 8.10:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #055191 | 2.59:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #055191 text on white | 8.10:1 | AAA | Lc 87.5 | Fine for body text |
| #055191 text on black | 2.59:1 | Fails | Lc -14.7 | Not readable |
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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DCF4
oklch(88.6% 0.041 250.6)
-
Step 300
300
#9FC4EF
oklch(80.9% 0.073 252.5)
-
Step 400
400
#68A5E7
oklch(70.8% 0.116 251.5)
-
Step 500
500
#3A8CDF
oklch(63% 0.148 251.6)
-
Step 600
600
#0875CD
oklch(55.7% 0.16 251.3)
-
Step 700
700
#0062AF
oklch(49.2% 0.144 251.3)
-
Step 800
800 (this color)
#055191
oklch(43.1% 0.124 251.5)
-
Step 900
900
#114373
oklch(37.8% 0.097 251.5)
-
Step 950
950
#0C2743
oklch(26.8% 0.062 251.9)
#055191 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) | #2F5693 | 0.033 |
| Deuteranopia (no green cones) | #144A90 | 0.020 |
| Tritanopia (no blue cones) | #00616A | 0.091 |
| Achromatopsia (no color) | #505050 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #055191
#055191
oklch(43.1% 0.124 251.5)
- #6F4600
#6F4600
oklch(43.1% 0.093 71.6)
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 #055191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.021
- Light Navy #155084 ΔE 0.022
- Cobalt #1E488F ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.044
- Twilight Blue #0A437A ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.053
- Peacock Blue #016795 ΔE 0.065
Use #055191 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.