#0559B1
Closest named color: Mid Blue (#276AB3). oklch(47.3% 0.157 255.8), rgb(5, 89, 177).
Aa
White text reads best on this color (6.83:1).
About this color
#0559B1 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.157 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.053 away. White text reads best on it, at 6.83:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.07:1 |
| White text | 6.83:1 |
Values
| HEX | #0559B1 |
| RGB | rgb(5, 89, 177) |
| HSL | hsl(211, 95%, 36%) |
| OKLCH | oklch(47.3% 0.157 255.8) |
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 #0559B1 | 6.83:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #0559B1 | 3.07:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #0559B1 text on white | 6.83:1 | AA | Lc 82.9 | Fine for body text |
| #0559B1 text on black | 3.07:1 | AA large text | Lc -19.0 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A0C3F2
oklch(80.8% 0.077 255.9)
-
Step 400
400
#6CA3EB
oklch(70.7% 0.121 255.6)
-
Step 500
500
#428AE5
oklch(63.2% 0.155 255.6)
-
Step 600
600
#1E71D3
oklch(55.5% 0.169 255.8)
-
Step 700
700 (this color)
#0559B1
oklch(47.3% 0.157 255.8)
-
Step 800
800
#124E94
oklch(42.8% 0.129 255.6)
-
Step 900
900
#174176
oklch(37.7% 0.102 256)
-
Step 950
950
#0F2745
oklch(27.1% 0.064 255.3)
#0559B1 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) | #2162B4 | 0.030 |
| Deuteranopia (no green cones) | #0054AF | 0.014 |
| Tritanopia (no blue cones) | #006F7C | 0.119 |
| Achromatopsia (no color) | #5B5B5B | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0559B1
#0559B1
oklch(47.3% 0.157 255.8)
- #7B5200
#7B5200
oklch(47.2% 0.099 75.6)
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 #0559B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.053
- Dusk Blue #26538D ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.061
- Blue Blue #2242C7 ΔE 0.065
- Peacock Blue #016795 ΔE 0.065
- Cobalt #1E488F ΔE 0.067
- Light Navy Blue #2E5A88 ΔE 0.069
- Dusky Blue #475F94 ΔE 0.072
Use #0559B1 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.