#558FBA
Closest named color: Faded Blue (#658CBB). oklch(62.8% 0.089 242.1), rgb(85, 143, 186).
Aa
Black text reads best on this color (6.02:1).
About this color
#558FBA is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.089 and its hue 242°. 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 6.02:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.02:1 |
| White text | 3.48:1 |
Values
| HEX | #558FBA |
| RGB | rgb(85, 143, 186) |
| HSL | hsl(206, 42%, 53%) |
| OKLCH | oklch(62.8% 0.089 242.1) |
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 #558FBA | 3.48:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #558FBA | 6.02:1 | AA | Lc 41.8 | Non-text elements, placeholder text |
| #558FBA text on white | 3.48:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #558FBA text on black | 6.02:1 | AA | Lc -39.4 | 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
#CCDCE8
oklch(88.6% 0.024 240.1)
-
Step 300
300
#A9C5DB
oklch(81% 0.043 241.8)
-
Step 400
400
#7AA6C9
oklch(70.6% 0.07 242.9)
-
Step 500
500 (this color)
#558FBA
oklch(62.8% 0.089 242.1)
-
Step 600
600
#397AA7
oklch(55.7% 0.096 241.6)
-
Step 700
700
#2B668F
oklch(49.1% 0.09 242.2)
-
Step 800
800
#255374
oklch(42.6% 0.075 242.5)
-
Step 900
900
#23455E
oklch(37.7% 0.059 242.4)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#558FBA 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) | #7C8FBC | 0.045 |
| Deuteranopia (no green cones) | #6F85B9 | 0.037 |
| Tritanopia (no blue cones) | #109A9E | 0.074 |
| Achromatopsia (no color) | #898989 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558FBA
#558FBA
oklch(62.8% 0.089 242.1)
- #AF7C4E
#AF7C4E
oklch(62.8% 0.089 62.1)
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 #558FBA, 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 0.028
- Off Blue #5684AE ΔE 0.032
- Cool Blue #4984B8 ΔE 0.035
- Steel Blue #4682B4 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.049
Use #558FBA 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.