#558DB8
Closest named color: Faded Blue (#658CBB). oklch(62.2% 0.088 243), rgb(85, 141, 184).
Aa
Black text reads best on this color (5.88:1).
About this color
#558DB8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.088 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.018 away. Black text reads best on it, at 5.88:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.88:1 |
| White text | 3.56:1 |
Values
| HEX | #558DB8 |
| RGB | rgb(85, 141, 184) |
| HSL | hsl(206, 41%, 53%) |
| OKLCH | oklch(62.2% 0.088 243) |
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 #558DB8 | 3.56:1 | AA large text | Lc -68.6 | Content text, not long reading |
| Black text on #558DB8 | 5.88:1 | AA | Lc 41.0 | Non-text elements, placeholder text |
| #558DB8 text on white | 3.56:1 | AA large text | Lc 63.1 | Content text, not long reading |
| #558DB8 text on black | 5.88:1 | AA | Lc -38.6 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE8
oklch(88.4% 0.024 244.2)
-
Step 300
300
#A9C5DB
oklch(81% 0.043 241.8)
-
Step 400
400
#7BA6C9
oklch(70.7% 0.069 243.5)
-
Step 500
500 (this color)
#558DB8
oklch(62.2% 0.088 243)
-
Step 600
600
#3B79A7
oklch(55.6% 0.096 243.2)
-
Step 700
700
#2D668F
oklch(49.1% 0.089 242.8)
-
Step 800
800
#265374
oklch(42.6% 0.074 243)
-
Step 900
900
#24455E
oklch(37.7% 0.058 243)
-
Step 950
950
#162837
oklch(26.9% 0.037 244.9)
#558DB8 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) | #7A8DBA | 0.043 |
| Deuteranopia (no green cones) | #6D83B7 | 0.036 |
| Tritanopia (no blue cones) | #16979C | 0.072 |
| Achromatopsia (no color) | #888888 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558DB8
#558DB8
oklch(62.2% 0.088 243)
- #AD7B4C
#AD7B4C
oklch(62.3% 0.089 63.2)
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 #558DB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.018
- Dusty Blue #5A86AD ΔE 0.022
- Off Blue #5684AE ΔE 0.026
- Cool Blue #4984B8 ΔE 0.030
- Steel Blue #4682B4 ΔE 0.036
- Silver Lake Blue #778DA9 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.046
- Blue NCS #118AB2 ΔE 0.046
Use #558DB8 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.