#0559AC
Closest named color: Dusk Blue (#26538D). oklch(46.9% 0.15 254.8), rgb(5, 89, 172).
Aa
White text reads best on this color (6.92:1).
About this color
#0559AC is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.150 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.051 away. White text reads best on it, at 6.92:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #0559AC |
| RGB | rgb(5, 89, 172) |
| HSL | hsl(210, 94%, 35%) |
| OKLCH | oklch(46.9% 0.15 254.8) |
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 #0559AC | 6.92:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #0559AC | 3.03:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #0559AC text on white | 6.92:1 | AA | Lc 83.3 | Fine for body text |
| #0559AC text on black | 3.03:1 | AA large text | Lc -18.7 | 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 700.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A1C3F0
oklch(80.8% 0.074 255.6)
-
Step 400
400
#6DA3E8
oklch(70.6% 0.117 255.1)
-
Step 500
500
#438BE1
oklch(63.2% 0.149 254.5)
-
Step 600
600
#2073CF
oklch(55.7% 0.162 254.6)
-
Step 700
700 (this color)
#0559AC
oklch(46.9% 0.15 254.8)
-
Step 800
800
#134E91
oklch(42.6% 0.125 255)
-
Step 900
900
#184274
oklch(37.8% 0.097 254.8)
-
Step 950
950
#0F2744
oklch(27% 0.062 254.6)
#0559AC 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) | #2861AF | 0.031 |
| Deuteranopia (no green cones) | #0053AA | 0.017 |
| Tritanopia (no blue cones) | #006D7A | 0.111 |
| Achromatopsia (no color) | #5A5A5A | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0559AC
#0559AC
oklch(46.9% 0.15 254.8)
- #7B5100
#7B5100
oklch(47% 0.099 74.6)
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 #0559AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.051
- Mid Blue #276AB3 ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.055
- Peacock Blue #016795 ΔE 0.060
- Cobalt #1E488F ΔE 0.062
- Light Navy Blue #2E5A88 ΔE 0.062
- Light Navy #155084 ΔE 0.067
- Dusky Blue #475F94 ΔE 0.067
Use #0559AC 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.