#558AB7
Closest named color: Dusty Blue (#5A86AD). oklch(61.5% 0.089 245.5), rgb(85, 138, 183).
Aa
Black text reads best on this color (5.70:1).
About this color
#558AB7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.089 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.016 away. Black text reads best on it, at 5.70:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.70:1 |
| White text | 3.68:1 |
Values
| HEX | #558AB7 |
| RGB | rgb(85, 138, 183) |
| HSL | hsl(208, 40%, 53%) |
| OKLCH | oklch(61.5% 0.089 245.5) |
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 #558AB7 | 3.68:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #558AB7 | 5.70:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #558AB7 text on white | 3.68:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #558AB7 text on black | 5.70:1 | AA | Lc -37.4 | 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
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#AAC4DC
oklch(80.9% 0.044 246.2)
-
Step 400
400
#7CA6CA
oklch(70.8% 0.07 244.9)
-
Step 500
500 (this color)
#558AB7
oklch(61.5% 0.089 245.5)
-
Step 600
600
#3E78A8
oklch(55.5% 0.097 245.7)
-
Step 700
700
#306590
oklch(49.1% 0.089 245.6)
-
Step 800
800
#285375
oklch(42.8% 0.074 244.7)
-
Step 900
900
#26455F
oklch(37.9% 0.058 245.5)
-
Step 950
950
#172837
oklch(26.9% 0.036 246.3)
#558AB7 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) | #778BB9 | 0.041 |
| Deuteranopia (no green cones) | #6A81B6 | 0.032 |
| Tritanopia (no blue cones) | #199599 | 0.076 |
| Achromatopsia (no color) | #858585 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #558AB7
#558AB7
oklch(61.5% 0.089 245.5)
- #A97948
#A97948
oklch(61.4% 0.089 65.4)
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 #558AB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.016
- Off Blue #5684AE ΔE 0.019
- Faded Blue #658CBB ΔE 0.020
- Cool Blue #4984B8 ΔE 0.023
- Steel Blue #4682B4 ΔE 0.029
- Blue NCS #118AB2 ΔE 0.044
- Silver Lake Blue #778DA9 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.049
Use #558AB7 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.