#558FC6
Closest named color: Faded Blue (#658CBB). oklch(63.4% 0.103 248.6), rgb(85, 143, 198).
Aa
Black text reads best on this color (6.13:1).
About this color
#558FC6 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.103 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.022 away. Black text reads best on it, at 6.13:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.13:1 |
| White text | 3.42:1 |
Values
| HEX | #558FC6 |
| RGB | rgb(85, 143, 198) |
| HSL | hsl(209, 50%, 55%) |
| OKLCH | oklch(63.4% 0.103 248.6) |
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 #558FC6 | 3.42:1 | AA large text | Lc -67.1 | Content text, not long reading |
| Black text on #558FC6 | 6.13:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #558FC6 text on white | 3.42:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #558FC6 text on black | 6.13:1 | AA | Lc -40.1 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CBDBEB
oklch(88.4% 0.028 248.1)
-
Step 300
300
#A8C4E0
oklch(80.9% 0.05 248.4)
-
Step 400
400
#78A5D1
oklch(70.6% 0.081 248.5)
-
Step 500
500 (this color)
#558FC6
oklch(63.4% 0.103 248.6)
-
Step 600
600
#3777B2
oklch(55.5% 0.113 248.9)
-
Step 700
700
#296499
oklch(49.1% 0.105 248.7)
-
Step 800
800
#24527C
oklch(42.7% 0.086 248.7)
-
Step 900
900
#224464
oklch(37.7% 0.068 248.8)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#558FC6 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) | #7891C8 | 0.041 |
| Deuteranopia (no green cones) | #6986C5 | 0.030 |
| Tritanopia (no blue cones) | #009CA2 | 0.087 |
| Achromatopsia (no color) | #8B8B8B | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558FC6
#558FC6
oklch(63.4% 0.103 248.6)
- #B37E3F
#B37E3F
oklch(63.4% 0.103 68.7)
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 #558FC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.022
- Cool Blue #4984B8 ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.040
- Off Blue #5684AE ΔE 0.042
- Steel Blue #4682B4 ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.048
- Water Blue #0E87CC ΔE 0.053
- Silver Lake Blue #778DA9 ΔE 0.055
Use #558FC6 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.