#558AC4
Closest named color: Faded Blue (#658CBB). oklch(62.1% 0.105 251.8), rgb(85, 138, 196).
Aa
Black text reads best on this color (5.81:1).
About this color
#558AC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.105 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.023 away. Black text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.81:1 |
| White text | 3.60:1 |
Values
| HEX | #558AC4 |
| RGB | rgb(85, 138, 196) |
| HSL | hsl(211, 48%, 55%) |
| OKLCH | oklch(62.1% 0.105 251.8) |
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 #558AC4 | 3.60:1 | AA large text | Lc -69.0 | Content text, not long reading |
| Black text on #558AC4 | 5.81:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #558AC4 text on white | 3.60:1 | AA large text | Lc 63.5 | Content text, not long reading |
| #558AC4 text on black | 5.81:1 | AA | Lc -38.1 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#A9C3E2
oklch(80.8% 0.052 253)
-
Step 400
400
#7BA4D3
oklch(70.7% 0.082 252.3)
-
Step 500
500 (this color)
#558AC4
oklch(62.1% 0.105 251.8)
-
Step 600
600
#3C76B4
oklch(55.6% 0.115 251.9)
-
Step 700
700
#2E639B
oklch(49.1% 0.106 251.9)
-
Step 800
800
#27517D
oklch(42.7% 0.087 251.5)
-
Step 900
900
#254365
oklch(37.6% 0.069 252.8)
-
Step 950
950
#16283B
oklch(27.1% 0.043 250.9)
#558AC4 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) | #728DC7 | 0.035 |
| Deuteranopia (no green cones) | #6482C3 | 0.025 |
| Tritanopia (no blue cones) | #00979E | 0.091 |
| Achromatopsia (no color) | #878787 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558AC4
#558AC4
oklch(62.1% 0.105 251.8)
- #AE7B37
#AE7B37
oklch(62.1% 0.105 71.4)
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 #558AC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.023
- Cool Blue #4984B8 ΔE 0.027
- Off Blue #5684AE ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.034
- Steel Blue #4682B4 ΔE 0.036
- Water Blue #0E87CC ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.048
- Blue NCS #118AB2 ΔE 0.054
Use #558AC4 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.